BE546849A - - Google Patents

Description

       

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 the present invention relates to magnetic recording and reproducing apparatuses. its on tape and in a more particular way to an improved tape spool and a mechanism for storing, placing and feeding a simple tape using removable magazines to receive the tape.



   Hitherto recording devices using a recording material such as magnetic tape or magnetic wire have been wound or unwound by hand and the reels used to store the recording material are assembled and disassembled by hand. In fact they did not compare to the recording discs of old type which could be put on a record player or be removed from it in an automatic way.

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 and which, despite their fragility, could be stored appropriately.



   The apparatus according to the invention enables automatic or semi-automatic handling of magnetic recording tapes as well in relatively inexpensive tape recording and / or reproducing machines as in high quality machines. One embodiment of the invention is a simple, inexpensive apparatus permitting the placement, entry, release and removal of magnetic tape in an automatic manner, in response to movement. a single control element operated dwarf or automatically.



  This device works. with high efficiency and allows a person to load a recording or reproducing machine with magnetic tape without touching the tape, to trigger the tape drive and to produce the output from the tape recorder by moving an element control, to release the tape from the machine by actuating a control and to extract the tape in a simple way, without touching it,
Since there is no difficulty in changing the recordings or feeding the tape when using this device, and since the placement can be adjusted,

     With the supply and extraction of the tape by a single control element, this apparatus is of practical use even when it is used in an automobile by its driver. As the recordings can be changed quickly and easily, a machine for recording and / or reproducing sound on tape comprising the apparatus according to the invention is particularly suitable for use in an automatic music distributor or

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 "juke box", a radio broadcast studio,

   a warship or any other place where there is a lot of noise and where a number of different signals or messages chosen in advance must be relayed by radio.



   In accordance with the intention, a winding of magnetic tape, preferably endless tape, is placed in a removable magazine capable of being easily placed on a recording mechanism and / or. reproduction of sound and removed from this mechanism. This magazine has a shape which preferably allows it to completely wrap the tape when the latter is not in use and is preferably protected against contact so that the tape is protected from damage due to rough handling of the tape. shop.



  Means may be provided to allow relative movement between a portion of the tape and the magazine to expose the tape for engagement with the magnetic head of the machine and with feed rollers or other tape drive members. The positioning or engagement of the ribbon and the triggering of the ribbon feeding can be carried out at different times or at substantially the same time as in the embodiment indicated above thanks to the automatic actuation. a single control element,

   by means of suitable electrical controls or similar devices or by manual operation of the control element. With this control element it was easily possible to release, remove and replace the tape by bringing the control element to a stop position and replacing the magazine with another magazine containing a different tape.



   After a magazine is placed in the active position near the magnetic head and the tape feed members of the recording or reproducing machine, it is possible to

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 actuate the control element to put the tape in position between said feed members and against the magnetic head and cause the feed members to be driven against the tape to bring them into their tape feed position, which allows you to trigger the ribbon feed. By activating the control element it is possible to interrupt the feeding of the ribbon at any time or to remove the magazine from its active position. We can then bring another magazine against the magnetic head.

   The magazines or cartridges according to the invention are of a simple and inexpensive construction, which makes it possible to provide economically a separate magazine for each magnetic tape.



   It is preferable to use an endless reel of tape in the rear of each magazine and to provide a device for guiding the tape at the end of the magazine to lower the tape for exposure. The tape can be exposed in response to movement of the magazine brought into its active position or by operating a control element before the tape feed begins.



   The tape spool employed in each magazine may be of a removable type keeping the tape properly stored and may be of a type which guides the tape in its movement towards or out of the turns of the endless tape winding. This coil can be of a type usable on as many different types of tape recorders as possible, so that it can be easily recorded on the tape when it is removed from the magazine.



   According to another embodiment of the invention, there is still provided a. endless tape reel that / activates when tilted or turned, like this ppent be the

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 case, for example, in a recording or reproducing machine placed in an airplane.

   In normal operation such a reel behaves like the endless reel of tape described in United States Patent Application No. 459,313 filed September 30, 1954, but it differs from the latter in that it has a rotating plate placed immediately above the wound tape, the lower surface of this plate serving as a support for the wound tape when the spool is turned over and allowing friction between the turns of the winding to be reduced when the spool is operated in this position overturned.



   The main aims and characteristics of the invention are as follows: - it proposes to provide a magazine facilitating the positioning and automatic feeding of an endless ribbon and adapted to receive a reel of ribbon capable of being used on most types of recording machines, which makes it easy to record signals or messages on the tape while it is removed from the magazine; the invention aims to provide an economical mechanism for setting up and feeding ten strips that is easily adjustable by means of a single control member;

   -said ribbon feeding mechanism used from interchangeable magazines of a low price and which put in exact position in contact with a magnetic head and feed 1,.; tape with minimum friction at uniform speed to suit high fidelity machines ;;

   - The invention aims to provide an up-to-date apparatus for setting up and feeding a tape using magazines protected against any contact so as to protect the tape from damage due to rough handling '.:?

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 - The apparatus according to the invention is designed to automatically perform the establishment, feeding, disengagement and extraction of a magnetic tape; - the apparatus is suitable for setting up and feeding a tape, small and not cumbersome, suitable for small tape recorders and reproducers, of low value, as well as for more expensive machines;

   - The invention also aims to provide a spool support for the wound tape, usable for endless tapes, reducing the friction between the turns of the winding when the reel operates in the normal or inverted position.



   Other characteristics and advantages will emerge from the description which follows.



   In the accompanying drawing, given by way of example only: FIG. 1 is a plan view, on a reduced scale, of a tape recording and / or reproducing apparatus comprising a tape supply apparatus, according to one embodiment embodiment of the invention, the magazine being in the active position and the control button in the stop position, for which the tape is lifted out of the feed position;
Fig. 2 is a partial plan view similar to FIG. 1 and shown on a larger scale, the cover being removed and the magazine cover torn off;
Fig. 3 is a partial Vertical sectional view, taken substantially along the line indicated at 3-3 in Fig.2, with certain parts intersected;

    
Fig. 4 is a partial plan view similar to FIG. 2. some parts being torn off to show the position of the parts during ribbon feeding when the main control tool is in the on position;

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Fig. 5 is a partial view in vertical section along substantially the line indicated at 5-5 in Fig.4 with certain parts broken away and shown in section;

     Fig. 6 is a partial plan view, some parts removed or broken away and showing the position of the parts when the control knob is in the "eject" position and the magazine removed;
Fig. 7 is a partial view in vertical section, certain parts being torn off and others removed, substantially along the line indicated at 7-7 on Pig.6, the upper part of the magazine lock being shown in broken lines;
Fig. 8 is a partial view in vertical section, some parts being broken away and others removed, along substantially the line / indicated at 8-8 in FIG. 7;
Fig. 9 shows a plan of a small-size magazine, the cover of which is partially cut away;

  
Fig. 10 is a vertical sectional view substantially along the line indicated at 10-10 in Fig.9, with some parts broken away and shown in section, the normal position of the latch when the magazine is held in the active position being shown in broken line;
Fig.

   It is a partial view in vertical section, substantially along the line indicated at 11-11 in Fig.9;
Fig. 12 is a partial vertical sectional view on an enlarged scale, with the tape torn off, showing one of the corners of the magazine, the lower position of the removing tape guide shown in broken line;
Fig. 13 shows in plan on a reduced scale a variant: of the magazine for larger reels of tape;

   

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Fig. 14 is a partial plan, some parts removed and showing the magazine of FIG. 13 in the active position while the ribbon is being fed;
Fig. 15 shows in plan on a reduced scale an apparatus for recording and / or reproducing sound on tape comprising a device for storing and feeding the tape, the active position of a magazine or tape cartridge. endless being shown in phantom and the active position of the two usual reels of tape being shown in solid lines;
Fig. 16 is a partial plan view, some parts being torn away and others removed from the device of Fig. 15, showing more gr:

     ! 1 (the scale the endless tape magazine according to the invention in the active position and / the fingers lowering the tape raised and put in their advanced position, the positions of the actuators of the mechanism actuating the fingers when the fingers are lowered and when the fingers are erased being shown in phantom;

  
Fig. 17 is a partial view in longitudinal section taken substantially along a straight line passing through the axes of the drive shaft and the tape spool, the tape lowering fingers being shown in solid lines in their forward raised position and in mixed tral in their erased position;
Fig, 18 is a: partial view in longitudinal section, certain parts being raised, substantially along the line indicated at 18-18 in Fig.16 and showing the fingers in the lowering position of the tape;

  
Fig.19 is a partial view in transverse vertical section, certain parts being deleted, showing the ladies which control the fingers for lowering the flap;

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Fig. 20 is a partial vertical cross-sectional view of the magazine, certain parts being omitted, substantially along the line indicated at 20-20 in FIG.



   19; Fig. 21 shows in plan, certain parts being torn off and shown in section, the magazine according to the invention of Figs. 16 to 20, the tape being arranged along a Mobius surface; Fig. 22 is a partial view in longitudinal vertical section taken on line 22-22 of Fig.21;
Fig. 23 is a partial vertical sectional view, taken substantially along the line indicated at 23-23 in Fig 21;
Fig. 24 is a partial plan view similar to the
Fig, 16 showing a variant of the invention, the parts being in the positions they occupy when the tape lowering fingers are retracted in the magazine shown in Figs. 21 to 23, and shown in phantom in their active position;

  
Fig. 25 is a partial view in vertical longitudinal section, some parts removed, substantially along the line indicated at 25-25 in Fig. 24 and on a slightly larger scale, the tape guides movable vertically in the magazine and the fingers of 'lowering the tape being shown in phantom in the position they occupy when the tape is lowered,
Fig. 26 is a partial plan view of the embodiment of the invention shown in FIGS. 24 and 25 and on the same scale as in FIG. 24, showing in blue line the positions of the parts when the ribbon lowering fingers are lowered (as indicated in phantom in Fig. 25) the magazine being shown in phantom in its active position;

   

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   Fig. 27 is a partial view in vertical section, with certain parts deleted, substantially along the line indicated at 27-27 in FIG. 26 and on the same scale as in FIG. 25;
Fig. 28 is a plan view, some parts broken away and shown in horizontal section, of another variant of a magazine in which a variant of the spool is mounted, the active positions of the spool drive roller being shown in lines mixed;
Fig. 29 is a vertical longitudinal sectional view on a larger scale taken substantially along the line indicated at 29-29 in Fig. 28, the spool drive roller being shown in phantom;

  
Fig. 30 is a partial plan view showing the magazine or cartridge visible in FIGS. 28 and 29, in the active position on a recording and / or sound reproduction mechanism, of the type shown in Fig. 1, the tape feed rollers and reel drive being shown in the active position during feeding the ribbon;
Fig. 3l is a partial view in vertical longitudinal section taken substantially along the line indicated at 31-31 in Fig.30 and on an enlarged scale;
Fig. 32 is a perspective view, certain parts being torn off and shown in section.:, Of the reel of tape shown:

     in Figs. 28 to 31 and of the expandable member which is attached to the coil when not in use in a magazine or cartridge, the normal position of this member on the coil being indicated in phantom;
Fig. 33 is a partial perspective view on an enlarged scale of the double-layer magnetic tape;

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Fig. 34 is a partial vertical sectional view taken on line 34-34 of FIG. 33.



   In all of the different figuras, the pieces are represented roughly to scale in such a way
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 that their relative shapes and dimensions are clearly apparent and like parts are identified by like references so as to facilitate a quick understanding of the invention. However, it is obvious that it is possible to produce devices of dimensions and type
 EMI11.2
 significantly different implementing the original principles of the invention.



   The placement and feeding mechanism
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 duruban according to the invention is suitable for 6trc; used in combination with usuul REC electronic equipment <.. git3trment and / or magnetic reproduction of sound..Although the electrical approach is not represented, it is obvious that it is possible to achieve a t5tu m% n-tic transmission of a recording or reproduction t; t an endless ribbon an Ót:;, blissU1t d,:,; s flow links mgnÓtiqu0 nv, 3o donations successive portions of the ribbon.



  As seen in the drawing 1 invention comprises a portable device 1 for unrogistrà-n-¯-nt and reproduction provided with an electric 3PPr0i11g comprising an electric motor at constinto speed, a hut-p:, r1c. : ur, un i1.ffiplific,: t ", ur due to ¯ - ^, utrs usual electronic equipment housed in a", box0 rçctjul ...... ir0 2. L'ùppùI ^ v11. : pc: 10ctriquc p, ui ctrv adjusts bia moyu-n of switches and buttons ... 1 ..; co <a.xd .: suitable for resel-r 1 sound, vitus3-, tone, 1-L pui.ssrnoé t / or L: 8 o ': r, ct ": resistiqucs: n? .. logu. <,; s, 0t for t,; xcit, r or blow,.; r the app-r. .1¯zg -l1 == striqno.

   Coniim we see 14, 1 available: 6i tL 1 st provided with .. dtix

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 vertical annular control knobs 3 and 4 aligned
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 laterally, arranged on the des. us of the box ..., 2 and provided with shafts penetrate downwards d: rxs the box and connected to suitable mechanisms d0 co: ù = Ji; n. places d: Jl1s the box. The top of the box is formed by a tray of
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 horizontal and flat metal sheet 5 assèda.xt a flat and smooth horizontal upper surface 6.

   A magnetic recording and reproducing head 7 protrudes a short distance above the surface 6 and is provided with suitable electrical means for establishing magnetic flux links with successive portions of a magnetic tape 17.



   The transmission tappet 7 is supported in an adjustable manner on the plate 5 by a substantially triangular plate 8 placed below the plate 5 and by three
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 fixing screws Q1 9 which penetrate towards 1 .; At the bottom of the circular openings formed in the plate 5, the fixing screws are received in circular threaded openings arranged at the three angles of the plate 8, and can be adjusted to put 1 plate and 1ft magnetic head that they support in the desired position. Head 7 is bolted .; or fixed rigidly in another way on the plate 8 so that its position can be changed
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 by setting 1: position of 1.plate 8.

   If desired, springs or other suitable elastic devices can be fitted on the screws 9,, 3ntr = 1 == p17t.: at 5 .a the plate 8 for axara, .r on 13 r: 1 ": qu. Jtt. :: 8 unù downward pressure.



  A guide a sheet metal Üliqu,.: 10 n for: ... 1 .: d; TJ ust rigidly fixed to the plt, c.u 5 by means of the flanges 11 t c5nstitu: l.:s walls v'- -ctiC'Ü08 dl unI .; substantially rectangular chamber forming ... ï .sin 12, ives opposas arms of i ,,, uid,.; in I7 forman ten p.uois p: ralllvs d .. guid--.gi for 1 'J ills-.g ". 3in. Un cou-

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 EMI13.1
 symmetrical decorative circle of fa2. . ,, isscur 13 is mounted on the box 2 above the plate 5, the guide 10 and the chamber 12 so as to cover the main tape feed mechanism and the shafts of the buttons 3 and 4, A
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 vertical drive shaft. 14 is mounted rc ¯¯ ¯.f on plate 5 and protrudes upward on top of cover 13.

   A decorative round commando button 15 is rigidly fixed to this shaft above the cover 13 so as to be able to turn the shaft as seen in Fig.3.



   The cover is provided with a flap part of sheet metal 16 of substantially uniform width and length, articulated on a fixed part of the cover so as to be able to swing around a horizontal fixed. A cantilever spring 18 rests on a protruding ledge
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 towards the bao 19 of the flap 16 so as to mnintdnir the latter in an open position tilted to the vertical or in a substantially horizontal position, COrDI! l <;; "can be seen in Fig. 3 where the flap covers the chamber 12. We can easily switch ilibattant to the open position when it is necessary to access the store.
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  We can bring a store provided with an antericure part having a 12rguur bt unG thickness corresponding to the width and height of the ohsmbru 12, dp-ns a 2ctiv0 position, as in Fig.l, by moving it longitudin :: lm: nt on 1 ^ SU1: 'f1C0 smooth 6. The posterior part of the ma2sin p, ut have an appropriate fppropriate form, whatever, according to 1. length of the ffisgnétiqu0 rubi-n it contains and the type d ,. coil used by c, him r. = meadows, znt6 in Figs. 9 and 13. If the ribbon sj unwinds from one spool winding onto another, part y, ost6ri tU '(; of the magazine p' - 'ut have a very different shape depending on whether the spools arranged in the magazine must revolve around axes

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 vertical, horizontal or inclined.

   However, if the tape is endless, the magazine contains only one spool and the spool is mounted so as to rotate about a vertical axis. It is preferable to use an endless tape winding in the magazine and to mount this winding on a plate or disc mounted to rotate and rotate about a vertical axis, so that the tape can be driven by internal cylindrical turns of the winding to the outer turns with a minimum of friction between the adjacent turns of the winding.



   The successive portions of the strip 17 are guided and driven in a path which goes from the inner peripheral coil, through the anterior part of the magazine, to the peripheral outer coil and returns by successive turns wound in a spiral to the internal coil. This path is approximately horizontal because the magazine must be introduced horizontally into the chamber 12 and the front part of the magazine which fits into the chamber is horizontal and at the same height as the rear part of the magazine which supports the chamber. tape spool.



  Since a spool of tape without., End is preferably placed in a horizontal position so as to rotate around a vertical axis, regardless of the direction in which the magazine must be moved to bring it into its active position in the magazine chamber and whatever shape or inclination the front part of the magazine must have in order to fit into this chamber, it is obvious that the positioning and feeding device can be modified tape according to the invention in many ways and that the magazine employed in any given machine can be of widely varying shape depending on the type of machine.

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   As seen in Figs. 1 to 15 each magazine is provided with a reel of tape of the type described in the aforementioned patent application and entitled "Endless reel of tape for recording and reproduction on magnetic tape" which follows application No. 324.449 filed on
December 6, 1952 and titled "Reel of Sound Tape". The small magazine A and the large magazine A 'shown in the drawing are constructed to receive a small or a large reel 20 and 20', respectively.

   The basic elements of the small and large spools are a horizontal annular plate or disc 21 arranged to support the wound tape, an annular frusto-conical hub 22 extending upwardly rigidly fixed to the plate and an annular bearing 23 supporting the hub and the plate carried by it with a view to their rotation about the vertical axis of said paller.



   The interior of the hub 22 has a shape corresponding to the outer shape of the bearing 23 and is provided with smooth cylindrical bearing surfaces which are arranged to match the smooth outer cylindrical bearing surfaces of the bearing 23. In order to achieve an economical construction, the hub discs are preferably of an inexpensive plastic material and the bearing 23 is preferably nylon, or some other suitable material. The hub preferably has an axial taper and its diameter increases as it moves away from the plate 21 or in the direction of extraction of the strip so as to guide the strip from the inner peripheral cylindrical turn of the winding.



   Although this is not essential for the proper feeding of the tape into the magazine of the type described herein, it is often preferable to provide stationary guides near the take-up of the tape so as to direct the tape.

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 from the inner turn of the winding 29 towards the front part of the store. As well as. As can be seen, the coil 20 or 20 'is provided with a thin annular cover 24 of plastic or similar material, provided with a rim 25 forming a skirt surrounding the cylindrical turns of the winding and concentric with them.



   The bearing 23 is press-engaged in a circular opening drilled in the center of the cover 24 so that the spool is held together, at least by friction, and the bearing supports the cover in a fixed horizontal position out of contact with the plate 21. Adequate openings are provided in the cover to allow movement of the tape 17 through the spool and out of it, formed by a symmetrical V-shaped slot 26 terminating at the edge of the cover.

   The cover is stretched between the opposing ends of the slot 26 so as to form a narrow free opening 27 extending from the center of the slot 26 radially outward and downward to the bottom of the cover to allow the opening. inserting an endless strip of magnetic tape 17 into the slot 26 without cutting the tape. The parts / of the cover with which the tape is in contact have a suitable shape as described in application N 459.313 so as to guide the tape precisely as it leaves the inner cylindrical turn of the wound tape.



   The tape 17 is spirally wound in an annular cavity 28 formed in the spool between the plate 21 and the horizontal central part of the cover 24 so as to form an annular winding 29 whose adjacent turns are in contact and which is concentric with the vertical axis of rotation of the plate 21 and of the hub 22 and capable of

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 rotate around this axis.

   The winding 29 rests on the flat surface of the top of the plate or disc 21, its inner cylindrical turn being substantially in contact with the conical hub 22 over its entire circumference, this inner turn preferably having an angular speed slightly lower than the speed. angular plate 21 during ribbon feeding, so as to reduce the friction between the turns in contact with the winding, so that the tension required to pull the ribbon is reduced to a minimum and the torque required to rotate the winding 29 is substantially uniform.



   Because the top of the plate 21 is flat and does not present an obstacle in the radial direction, towards the outside of the hub 22, the tape can move horizontally towards the outer peripheral turn of the winding as it enters the coil.



     It should be noted that the tape reel 20 is susceptible to general application and is suitable for use in most types of tape recorders. As can be seen the tape winding is done in a clockwise direction with an "A" winding (the magnetic coated side of the tape facing radially inwardly of the winding. ) in such a way that the tape can be easily mounted on the greatest possible number of conventional tape recorders.

   This facilitates the recording of a message in the different types of tape recorders available, the reel being removed from the magazine according to the invention, for example after the original message has been erased. on the ribbon.

   Although the complete tape spool with its cover requires a magazine of one. greater height than a coil without cover and is more expensive to manufacture, it is often desirable to

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   hard cover 24 in the spool to facilitate correct ribbon storage when the ribbon is in the
 EMI18.1
 r: 1 ,:

  , g8.j n ct when using the rrbem or keeping it outside the I! lsg.sin and to ensure a suitable guide of the ribbon during feeding of the latter.
 EMI18.2
 It is evident that the coil 20 employed in the reduced dimension magnifier A shown in Fig. 9 may be of similar construction to that of the coil 20 'used.
 EMI18.3
 in the larger store rt,.,; rescnt, - read Fig. 13, except that it is ds.amèt, ^ reduced and has a shorter length of ribbon. It is also of course understood that the front parts of the small and the large stores shown here are of substantially identical construction so that both fit into the chamber 12.

   As can be seen in FIG. 9, the coil 20 is mounted in a
 EMI18.4
 cavity 30, or r6ccptclo, mnqgée in 1 ^ posterior part of the store or c: irtouche li, the bearing 23 being slidably mounted, in a fixed position, on a -.3ce 32 provided against said cavity.

   The outer surface of axis 38 has a \ :) shape-
 EMI18.5
 adapted to fit the interior surface of the bearing 23 so as to support the bearing in an upright position, and preferably has a non-circular portion capable of being
 EMI18.6
 to engage with the p ', ". 1: T c r for ,,; Flpêcjl1n.c the rotation of cc last \ .;' ensure a suitable angular position of the reel with respect to the magazine. l ,, ': "n :: i that it is seen the axis 32 is r nnuLÜr0 and made ar E¯ s; ac 1 .; bottom 31 of ma-. ., ^ ¯-in, .n so qu-j c: bottom n.:Fat be 1 r maul ;; at the same time <. :: r..p3 that L: H :: f; ... "1; i03 i.'YfC: ¯ 'Zc: S du (: 1 r: .S1! in a single mold at: II' . ". 2.É?" :;: s'G7.qLl:

   ,

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The reduced-size warehouse A shown in
Fig. 9 to 12 comprises the essential characteristics of the invention. Such a magazine is arranged to form an enclosure around the tape 17 when not in use and it is preferably protected from external contacts to prevent deterioration of the tape by small children or careless persons. A suitable device is provided allowing relative movement between the tape and part of the magazine for the exposure of part of the tell tape:

   so that the tape can be applied against the magnetic head 7 when the magazine is in its active position, As can be seen, the magazine A has a substantially rectangular anterior part 33 and a rounded posterior part 34 with a semi-cylindrical rear wall 35 concentric with the axis 32. As can be seen the wall 35 is separated by a small gap from the edge of the small reel and in this way prohibits the use of a larger reel in the magazine A. However, one can mount a smaller coil on axis 32, if desired.



   The rectangular part 33 has parallel side walls 36 and 37 visible in FIG. 9; they are tangent to the posterior wall 35 and extend @ rière in. before. This rectangular part also comprises a substantially rectangular cavity 38 in its lower part at mid-distaiico between the walls 36 and 37 and provided with a vertical U-shaped partition 39 with a height corresponding to that of the partitions 35, 36 and 37 .

   The front part 33 also comprises a horizontal straight part 40 intended to receive the rubr and perpendicular to the laterite walls.

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 and located above the hollow part 38 so as to form the front partition of the store.



   There may be provided in the magazine members making it possible to guide the tape 17 forward from the inner peripheral turn of the tape winding, between the parallel parts of the partitions 37 and 39 depriving one of the sides of the tape. magazine to an anterior corner of the magazine, then laterally to the other corner of the magazine and finally from front to back, between the parallel parts of partitions 36 and 37 following the other side of the magazine, up to the coil outer peripheral of the winding. As can be seen, the parallel parts of the partitions 36,

   37 and 39 forming rectangular corridors for the passage of the tape and the tape is engaged on dux annular grooved guides 41 to allow it to move up and down in these corridors substantially between the bottom of the store 31 and its cover 50.



   The guides 41 can be mounted on the magazine in any way so that they can slide or tilt
 EMI20.1
 vertic '":'. 10ment. As can be seen the dutu: angles -iiiterieurs of the magazine are provided with vertical axes 43 integral with the bottom 31 and having a cylindrical outer surface on which can slide the cylindrical inner surface of the guides 41. The pins protrude from the bottom and extend substantially to the cover 50 so as to direct the guides 41 in the vertical direction.

   The guides are compressed from bottom to top towards the cover 50 by means of helical compression springs 42 which are mounted on the pins 43 and fit into clear cavities in the lower part of the guides and rest on the bottom. 31. As best seen in Fig. 42, each spring is arranged to allow the lowering of a

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 guide to a position in which it rests against the bottom 31 as shown in phantom on the
Fig. 12, and the raising of the guide in the position where it bears against the cover 50, as shown in solid lines in this figure.



   In order to support the tape and prevent the axial movement of the tape relative to the guides 41, each guide has a low curvature groove intended to receive the tape, of uniform width corresponding to that of the tape 17.



  The guide groove is preferably annular for ease of manufacture and preferably has smooth horizontal guide surfaces for contacting the top and bottom edges of the tape, and a smooth, vertical outer tape contact surface. and cylindrical, with a view to keeping the lateral faces of the straight part of the tape stretched between the guides 41 in a vertical position.



   The straight part of the tape 17 is supported by the annular guides 41 inside a narrow straight slot 52 made in the top of the front part 40 of the magazine, when the guides are in the upper position shown in FIGS. 9 to 12, so that the ribbon is completely inside the magazine. Because the slit 52 is very narrow and almost completely covers the tape engaged therein, the magazine has been found to be virtually shielded from outside contact and the tape is protected from careless handling.



   The magazine is provided with a forint cover plate 50 which covers the anterior and posterior parts 33 and 34 of the magazine including the exterior cavity 38 and the interior cavity 30, so as to cover the entire length of the ru-

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 ban. This cover can be removed to release the tape from the guides, remove the spool 20 from the housing 30, and release the guides 41 and springs 42 from the pins 43, so as to allow the replacement of worn parts or the insertion of a other tape reel with or without a reel cover 24.

   It is obvious that the magazine may have a lower height than that shown in the drawing if the spool cover 24 is removed and / or if the fixed tape guides, located near the take-up are disposed on the magazine cover or the partition 39 and not on the cover 24.



   Although the cover 50 can be removed, it is often desirable to arrange the magazine in such a way that this cover cannot be easily removed by unauthorized persons or young children who could damage the tape. As can be seen, the shaft 32 is threaded to receive a screw 51 removably fixing the cover 50 to the parts of the magazine which cannot be removed. The head of the screw is preferably shaped to open with a special tool and not an ordinary household screwdriver so that the magazine is protected from external contact.



   Any suitable device may be provided for producing the relative movement of the tape with respect to the front portion 40 of the magazine containing the tape, in order to expose the tape. As can be seen, the part 40 is fixed and the tape moves relative to the magazine under the effect of a U-shaped lever 44 mounted to pivot, comprising at each of its ends a flat lower face 144 arranged for come into contact with one of the tape guides 41.

   The 1 Avoid 44 acts axially on the guides and

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 simultaneously lowers them until they move a predetermined distance below cover 50 and the tape is to be exposed in cavity 38 below portion 40 of the magazine.



   On each side of the magazine there are narrow longitudinal slots 45 allowing the necessary movement of the lever 44 through the cover 50 ;, and slots 54 of equal width are provided in the lateral part of the magazine guide 10 in the same goal. A slot 46 is managed in the middle of each of the pins 43 and is aligned longitudinally with the slots 45 and 54 to receive the lever 44 as it is lowered to its lower position.



     The upper part of each of the guides 41 is preferably provided with a shallow slot 47 for receiving the lever 44, the bottom of this slot being horizontal and parallel to the lower surface of the tape guide. Surfaces 144 are preferably horizontal when lever 44 is in its lowest position so that guides 41 are kept in a substantially horizontal position when lowered even when! il .: have some play on the axes 43.



   Preferably the guides 41 at least partially provide some resistance to rotation so that they slightly oppose the movement of the tape and thus maintain the tape in an approximately rectilinear position. As can be seen, each guide 41 is provided with a radial projection 48 or tab, and each of the front corners of the magazine is provided with a vertical slot 49 intended to receive the tab 48 by sliding contact and to prevent retation of the tab and the. guide 41 which is solidire.

     The slots 49 feel

  <Desc / Clms Page number 24>

 sibly the same shape in horizontal section as the legs 48 and allow the latter cases to slide freely in the vertical without.



   If desired, the disc 21 can be driven by a motor as will be described below, in order to reduce
 EMI24.1
 the friction between the turns in contact with the winding. As can be seen each store has a sample
 EMI24.2
 crtà-z <53 provided in the Pirois 31 and 39, preferably midway between the opposite edges of the magazine to receive a roller 105 of entry :: '. ÎnOi1l0nt of the disc which will be described below. However, since the small magazine A uses a short length of the ribbon, it is usually unnecessary to drive the disc 21 because there is only one
 EMI24.3
 reduced friction untrc the spirus of 1W Coiled, ::

  2int 29, especially in the case where the magnetic tape is coated with a uniform and continuous thin film of graphite,
 EMI24.4
 for example as described in the aforementioned d0 brwva application? 459 13, an arrangement which will efficiently conduct static electricity along its entire length.



   The large magazine or cartridge l 'is identical to the small magazine A with the difference that the posterior part
 EMI24.5
 higher is = gr: u.ïie in the direction r-.di 1 outwardly of f,. to receive a larger spool ost a greater length of the tape. The gr'nd m'gasin A 'having 1--; firm indented on .rig.l3 at 14 may contain a length of tape approximately three times the length of tape normally cor: t ", nuv in p,: tit m., g,; sii-1 A.

   When the disc carrying the winding and the spool have a diameter of about 110 to 125 millimeters it has been found that a magnetic tape of a length of 1.6- 1.6-

  <Desc / Clms Page number 25>

 higher at 180 meters especially when using a thin ribbon of cellulose acetate. However, when the endless tapes have lengths of 180 to 560 meters it is generally necessary to drive the spool by means of the drive roller 105 as seen in FIG. 15 to minimize the friction between the turns of the wound tape.



   The front part of the large store A 'is analogous to the front part 33 of the small store A, so as to fit into the' housing 12; however the rear part of the large magazine is larger than the rear 34- of the small container magazine to accommodate a larger spool 20 '. Spool 20' is identical to the smaller spool 20 described above except that it has a larger diameter and contains a greater length of ribbon.

   As can be seen, the edges of the rear part of the large store A 'are defined by a semi-cylindrical rear wall 35' and side walls offset towards the outside 36 'and 37', which can be selected from the walls 55, 36 and 37 of the small store A.



   It is easy to see that the magazine A or A ', or another magazine of any convensble dimension, can be slid horizontally, longitudinally on the smooth horizontal top 6, in order to penetrate into the chamber 12 and bring it into a psed-determined active position. The parallel longitudinal arms of the. guide 10 are in sliding contact with the opposite sides of the.

     magazine, so as to guide it to its activated position, and the lateral part of the guide 10 serves as a stop to stop the movement of the magazine when it reaches this position.

  <Desc / Clms Page number 26>

 



   It is preferable to provide a removable device for locking or maintaining the magazine in its active position in the chamber 12. As can be seen in the drawing, the main tape feed mechanism mounted in the box 2 comprises two parallel longitudinal locks. 55 laterally aligned and rigidly interconnected so as to tilt simultaneously under the action of a side bar 153, as best seen in Figs. 7 and 8. The locks enter the tray '5 through narrow longitudinal slits 56, and are arranged to engage with the narrow laterally spaced slits 156 provided in the bottom 31 of the store, and to exit therefrom.



  The slits 156 coincide with the slits 56 when the magazine is brought into its active position, and on the front edges of the first slots the latches 55 engage, so as to prevent the magazine from leaving its active position.



   The locks are pivotally mounted on a plate 101 bolted to the plate 5 by means of bolts or pins 58 aligned laterally, as seen in Fig. 8, so that the triangular parts 57 in contact with the magazine, located at the rear ends of the locks tilt around a horizontal axis, engaging in the slots 156 and / or moving away. Any suitable device can be provided for tilting the locks into their locked position or into their retracted position.



  As can be seen in the drawing, the rear ends 57 are brought above the surface 6 in the locking position and below this surface in the retracted position by means of a cam device acting in response.

  <Desc / Clms Page number 27>

 to the rotation of the control button 15 and of the control shaft 14. This elm device comprises a projection or cam 59 provided laterally on the bar 155 halfway between its ends, a roller 160, cooperating with the cam
59 to actuate the latches and a compression spring 61 pressing the cam against the roller.

   The roller 160 is rotatably mounted on a redial arm 60 or shaft integral with a hub 162 rigidly fixed to the lower part of the control shaft 14. and is held on the arm by a screw 161.



   The angular position of the arm 60 can be easily adjusted such that the parts 57 of the latches are brought into the locking position for any predetermined angular position of the shaft 14.



   A suitable device can be provided for keeping the magazine in contact with the front part of the bolts 57 and / or for ejecting the magazine rearwardly out of the guide 10 and of the magnetic head 7. Cossue as seen in the drawing, these two functions are accomplished by a set of two parallel ejector rods 63 spaced laterally and will compress by a spring, which push the magazine backwards and provide elastic resistance to the magazine's movement forward as it comes in. active position.

   Each rod 63 is mounted in a horizontal position so as to be able to slide longitudinally in longitudinally aligned holes provided in the lateral part of the guide 10 and in a vertical tab 62 curved upwards from the edge II of the guide.



   Each rod preferably has an enlarged head 163 at its rear end, capable of being applied against the rear face of the guide 10 with a view to

  <Desc / Clms Page number 28>

 limit the movement of the rod forward when it moves away from the magnetic head 7; each of the rods 63 has an annular front portion 66 which slides through one of the tabs 62 and is internally tapped in order to receive a bolt 67 whose head can engage against the tab so as to limit the movement of the rod towards the head 7.

   Each rod is provided with a collar 64 at the rear end of the annular part 66 and an ejector spring 65 mounted around this annular part and placed between the tab 62 and the collar 64 in order to compress the rod vera l 'back.



   As can be seen, the rods 63 are substantially in line with the locks 55 and are located near the inner faces of the lever 44 so as to come into contact with the front corners of the magazine on the two opposite sides of the cavity 38 When the rear magazine is engaged forwards in chamber 12 in contact with the heads of the ejector rods 163, the springs 65 are compressed and the heads 163 are brought against the guide 10 to stop the magazine when it reaches its point. active position.



   During will move it from the store forward to its. active position, the bottom of the magazine which rested on the smooth surface 6 cooperates with the inclined posterior surfaces of the triangular partios 57 of the bolts so as to lower them below the surface 6, thus compressing the springs 61.

   When the magazine reaches its active position the locks come to be housed in the slots 156 of the magazine and the springs 61 relax so as to bring the locks into the locking position in said slots and to bring the roller 160 back to a position adjacent to the slot. cam 59.

  <Desc / Clms Page number 29>

 When you turn button 15 in the direction
 EMI29.1
 clockwise to the "éjOctiOn" position, the roller 160 cooperates with the cam so as to bring the latch portions 57 out of the slots 156 by lowering them below the surface 6 and releasing the bolts .



  When the magazine is released the springs 65 relax and the rods 63 eject the magazine rearwardly away from the tape drive mechanism and the magnetic head of the box 2, to facilitate removal from the magazine.



   To prevent an unwanted rotation of the shaft 14 in the opposite direction of the needles of a watch, it is advantageous to provide a temporary stop device to prevent a rotation tiller when there is no ma-
 EMI29.2
 gasin in chamber 12. It is IJ1'éféJ: 'D.b18 to provide a stopping device for the shaft 14 which can be erased in response to movement V0rs 1''forward of an ejector rod by: mi t 0 d: .T the engagement of an amenà store in the activated position in chamber 11? . 00nt. <i <1 as seen in the drawing, the arbro 14 is provided with a plate r'1dir the abutment dG 68 forming a parallel projection ,, u platjiu 5 and located above it and fixed r4-gid ,, risiit to tree 14 will defeat 0 U rt 'l'r n.'VGC him.

   This projection 68 constitutes a; stop likely to come into contact with a horizontal pawl 69 form an angled lever arranged 2u-dcs.::us du j; 1t = t.Jna 5 to prevent any new drns in the opposite direction of .iijjaill.àa dtun-ù shows of button 15 that is to say for the 0chor do move from the stop position to the hook position when the chamber 12 is empty. The pawl has a b,; c 70 at the front end which may be> Jngi; gô

  <Desc / Clms Page number 30>

 
 EMI30.1
 away from it and an upwardly curved portion 71, at its opposite end which is in the path of the head 67 of one of the rods 63 with which this portion can get in touch.

   A vertical pin or bolt 72 is provided on the pawl between the ends 70 and 71 thereof, intended to ensure its mounting on the plate 5 and to allow it
 EMI30.2
 of oscillor horizontally, U-d0SSUS of the plate 5.



   A suitable device is provided for urging the pawl 69 and its beak 70 towards a locking position on the path of the stop 68, and this device
 EMI30.3
 tif is formed of a tension spring 73 fixed aa pl'1te: 1u 5 and extending from front to back from a portion of the pawl located between the axis 72 and the part 71 in contact
 EMI30.4
 with 1-ejector rod, so as to urge the pawl to rotate in the opposite direction of the watches of a watch. The spring 73 maintains the pawl against one of the rods
 EMI30.5
 Ójectric0s and is conjugated wac the spring 65 to push the rod back and forth towards the magazine.

   Cunç3. the rod 63 is pushed forward: ':. 7. moment when the IW "'. g: 1sin A or Art slides on the surface 6 until it'. position '1ctiv in the chamber 12, the head of the bolt 67 comes to push the part 71 of the cisctvet which tilts thus, oscillates in clockwise around its vertical axis to an erased position, outside the path of the stop 68, the shaft 14 then being free to turn in the counterclockwise direction of the clockwise the position of
 EMI30.6
 market.

   When the magazine is extracted from the chay-ibrj 12, the spring 73 returns the pawl to its normal locking position for which it is engaged on the path of

  <Desc / Clms Page number 31>

   -the stop 69 to prevent the control shaft from rotating in the opposite direction of the needles of a watch.



   Two tabs 74 are cut out in the top 5 and are curved upwards so as to form vertical supports for the U-shaped lever 44, thus leaving windows 174 in the tray 5. The lever 44 is pivotally mounted on it. the legs 74, so as to tilt vertically around a horizontal axis located in the vicinity of the shaft, 14, by means of two horizontal bolts or axes 75 aligned laterally and each placed at equal diatenve of the guide 10, L ' pivot axis of lever 44 is parallel to the front part of the magazine and is preferably placed at a certain distance above the horizon plate ':

       it, 5, equal at least to the level of the surface 144 when the lever is in its most basic position and not visibly exceeding the level of this surface when the lever is in its highest position so that this surface does not s 'not deviate significantly from the horizontal position.



  It is also preferable that the pivot axis of the lever is a certain horizontal distance from the part of the surface 144 resting against the tape guide, for the same reason.



   Retort as seen in the drawing, the lever 44 is formed of a metal strip having a semi-cylindrical front part 76 concentric with the shaft 14 and straight lateral branches 77 parallel to the sides of the guide 10 and comprising the surfaces 144 co-operating with the tape guides 41. Any suitable device may be provided for pivoting the lever 44 about its horizontal axis in response to the movements of the control button

  <Desc / Clms Page number 32>

 15. As can be seen, the shaft 14. is rigidly fixed to a hub 178 integral with a horizontal radial arm 78.

   A cylindrical support roller 179 and a cylindrical cam roller 79 are mounted at the outer end of the arm 78 so as to rotate about the horizontal axis of this arm and are retained against any axial displacement on the arm by suitable members comprising a screw 180. The roller 179 is disposed inside the part 76 of the lever 44 and has a diameter which allows it to roll on the smooth top 6 of the plate 5, but the roller 79 preferably has a smaller diameter of such that it is not in contact with this surface 6.



   The semicircular portion 76 of the lever 44 comprises a surface 80 forming a ca.ne on its lower edge with which the roller 79 cooperates, which makes it possible to determine the angular position of the lever for each angular position of the arm 78. The surface 80 is shaped such that it lifts part 76 when knob 15 is turned to the "on" position, so as to expose tape 17 in cavity 38. Any suitable device may be provided for lowering part 76. when turning the knob 15 clockwise from the "on" position to the "off" position so that the tape can be lifted out of the cavity 38.

   As can be seen in the drawing, the lever 44 with its surface 80 are urged to move angularly in contact with the roller 79 by means of a tension spring 81 fixed to the plate 5 in front of the lever 44 and out of the way. path of the arm 78 and its screw 180. The erssort is placed vertically on the plate 5 and is attached to a stud 181 in gssillie forward on

  <Desc / Clms Page number 33>

 part 76. It is obvious that any other spring device capable of resiliently opposing the movement of lever 44 under the effect of arm 78 can be employed.



   It can be seen that the part of the tape which is included between the guides 41 can be moved vertically between a high position inside the slot 52, and an exposed position inside the cavity 38. The position of the head magnetic recording and reproduction
7 on box 2 is as it is in space
38 between the parallel parts of the partition 39 and behind the slot 52 when the magazine A or A 'is brought into its active position in the chamber 12. In the drawing the head is relatively small and has a substantially rectangular shape in section. which allows it to fit easily in the cavity 38 without touching the partition 39.



  The top of the magnetic head 7 is lower than the bottom of the front part 40 and the bottom of the tape when the tape is in the up position so that the magazine can slide on the surface 6 over the magnetic head. The part of the tape suspended in the high position and included between the guides 41 therefore passes over the head 7 when the magazine is moved to put it in the active position or in the inactive position,
When the magazine is in the active position and the tape is exposed as a result of the movement of the lever 44 and the lowering of the guides 41, the tape is level with the vertical front face 82 of the magnetic head 7. This face is very smooth and is preferably curved so that the tape can be held firmly against the head.

   The magnetic head can be provided with a groove or

  <Desc / Clms Page number 34>

 recessed part of a width allowing it to receive and guide the tape, but as can be seen in the drawing the face 82 of the head 7 in contact with the tape, has the shape of an arc having a regular cylindrical surface and smooth.



   The magnetic head may have on its front surface 82 a variable number of tracks intended to establish a transmission of flux with the successive portions of the ribbon. For example, one can increase the uptime of a given length of tape by recording messages at several different levels along the length of the tape, and establishing flow transmission at one level and then another.

   By using suitable electrical equipment, this can be achieved without having to physically move the body of the head 7, and the level changes in the vertical direction can be made manually or automatically by means of switches or similar devices. In some machines, a full read head can be used, but it is probably preferable to use a half read head that reads only about half the width of the tape at a time, so that one can advantageously use a Mobius surface or loop. Such a surface can be produced by cutting the tape, giving one end a half-twist and re-gluing the tape.

   By using the Mobius loop in the magazine placed in chamber 12 'eg the magazine shown in Fig. 21, the usage time of a given length of tape can be doubled. The possible advantages of the Mobius loop for a very short length of tape or a fast moving tape having only a very short pitch time or for an extremely long tape (360 meters for example)

  <Desc / Clms Page number 35>

 appear clearly.

   However, the Mobius loop usually requires the use of a double-layer tape (with a magnetic coating on each side) which may not always be satisfactory when the tape is extremely long or is fed at high speed. so that the problem of friction arises in a serious way.



   Any suitable device can be provided for bringing the tape into contact with the slightly curved front surface of the magnetic head 7, once the tape has been exposed and brought into the lower position by the guides 41. This device for moving the tape preferably brings the tape in the active position or in contact with the head 7 or in the inactive position in response to the rotational movement of the shaft ,, 14, and preferably it acts on the tape in such a way that the latter conforms to the shape of the face 82 of the magnetic head.

     As can be seen in the drawing 'the device making it possible to put the tape in exact position against the face 82 consists of two vertical metal guide fingers 83 aligned laterally and mounted so as to effect a back-and-forth movement on the plate 5. - Comes longitudinally to come into active position in contact with the front face of the tape and in inactive position; each finger is preferably provided with a groove 84 intended to receive the tape, having a vertical surface with low curvature and of a uniform width substantially equal to that of the strip of tape, so as to bring the tape into exact position against the head 7 at a predetermined distance above the surface 6 when the guides are in the rear active position.

   As can be seen, the guide fingers have a circular horizontal section and the grooves

  <Desc / Clms Page number 36>

   84 have a uniform radial depth, and thus form a smooth cylindrical vertical tape contact surface and a smooth upper and lower horizontal guide surface. the grooves 84 are aligned horizontally and disposed at an equal distance from the surface 6 so as to support the tape parallel to this surface when the guide fingers are moved to their rear position.



  The lower horizontal surfaces of the annular grooves formed in the plastic guides 41 are preferably substantially at the same level as that of the guides 83 when the guides 41 are in their lower position, in contact with the bottom 31 of the magazine, so that these guides support the tape horizontally aligned with the grooves 84 keeping its lower edge parallel to the surface 6 when moving the guide fingers horizontally relative to the tape in one direction and the other.

   As can be seen, the annular grooves formed in the tape guide elements 41 and 83 are located so as to support the tape substantially at the same level as the winding 29 so that the lower edge of the tape is substantially horizontal in its movement. from the magnetic stubborn to the peripheral outer turn of the winding 29.



   The plate 5 is provided with two grooves 85 having their largest dimension in the longitudinal sns, and aligned laterally, of uniform width and of the same length, arranged on either side of the magnetic head 7, their rear edge being close to opposing anterior angles of the teta, The front and rear edges of the

  <Desc / Clms Page number 37>

 grooves are preferably aligned transversely and preferably come into contact with the guide fingers in their front or rear position so as to limit the longitudinal movement of the fingers.

   The longitudinal side edges of the grooves 85 are parallel to the longitudinal portions of the guide 10, and are in sliding contact with the fingers to guide them in a longitudinal direction while preventing their transverse movement. As can be seen in the drawing, the axes of the fingers of the guide 83 are always located in a transverse vertical plane perpendicular to the longitudinal parts of the guide 10. The fingers have an active rear position which is located at the right of the opposite ends of the guide. surface 82, so as to keep the tape substantially retorted, it is shown in Fig.4 in contact with this surface, nearly along its entire length.



   In the tape feed mechanism shown in the drawing, the part of the tape which bears against the guides 83 is a short distance behind the portions of the tape extending laterally in contact with the anterior parts of the head and the heads. guides 41 when the fingers are in their rear position, and the portions of the tape which extend laterally by pressing against the anterior parts of the guides 41 are substantially aligned with the part of the tape applied against the anterior part of the head, which makes it possible to move the guide fingers out of contact with the tape, and to lower and raise the part of the tape between the guides 41, before and:

  near use, without any unwanted gene due to violent contact with the magnetic head or the guide fingers.

  <Desc / Clms Page number 38>

 



     When raising or lowering the held tape. between the plastic guides 41, it moves between a vertical drive roller 86 and a freely rotating rubber covered roller 87. Like the head 7, the drive roller has an upper surface disposed closer to the surface. 6 that the part of the magazine movable horizontally above it and is preferably kept fixed with respect to any horizontal movement so that the magazine can be slid over the surface 6 in the chamber 12 until the drive roller is in the cavity 38 in front of the tape suspended in the slot 52.

   Preferably the roller 86 has a shape similar to that of the fingers 83 thanks to a precise machining of a piece of metal, but unlike the non-rotating guide fingers, the roller is driven continuously by an electric motor. The starting and stopping of the feeding of the ribbon is effected by moving the free roller 87 horizontally to bring it into frictional contact with the ribbon or out of contact. The rollers 86 and 87 are arranged to rotate about vertical axes and are separated when the fingers 83 are moved to their forward position so that they do not interfere with the vertical movement of the tape under the action of the guides 41.



     As can be seen in the drawing, the fingers 83 and the free roller 87 can be moved horizontally through suitable windows made in the plate 5 and through a large rectangular cutout 121 provided in the transverse part of the wall of the guide 10 to mid-distance between the slots 54 and the rods 63. The cutout 121 rises above the surface 6 to a height greater than that of the guide fingers or of the free roller as can be seen clearly

  <Desc / Clms Page number 39>

 in Fig. 8, this height corresponding substantially to the level of the bottom of the straight part 40 of the store. Such an arrangement allows the introduction of the guide fingers and of the free roller in the cavity 38 of the magazine without hitting the magazine.



   The fingers 83 are rigidly attached to the rear end of a plate or carriage 88 comprising two branches, mounted under the plate 5, with a view to effecting a longitudinal reciprocation in a horizontal plane. parallel to the portion of guide 10 in contact with the store. A longitudinally elongated slot 89 is formed in the plate 88 and is crossed by a guide pin 90 rigidly fixed to the plate 5. The slot has two parallel edges in contact with which the pin slides, so as to cooperate with the grooves 85 to guide the plate 88 longitudinally.



   Washers or other suitable elements may be provided on the peg 90 to prevent the front end of the platform 88 from moving vertically towards or away from the platform 5.

   Likewise, the guide fingers 83 of the rulen are provided with parts which are radially widened, or having an equivalent arrangement of a diameter greater than the width of the grooves 85, which are in sliding contact with the top and the bottom of the plate 5 along edges of these grooves, to prevent the rear end of the carriage 88 and the fingers 83 carried by the carriage from moving vertically towards the plate 5 or away from it This is why the movements of the carriage are limited to a sliding in a horizontal plane.



   A suitable device can be provided which -

  <Desc / Clms Page number 40>

 
 EMI40.1
 conch to move the carriage; F3 lOn, ltuc3.in:., lei: Ient, for positioning the rub .n in contact with the magnetic head 7 while the ribbon is driven by the feed rollers 86 and 87. Preferably this device moves the plate forward in response to the rotation of the shaft 14 in the anti-clockwise direction.
 EMI40.2
 "on" position.

   GO: flùfi8 as can be seen .3U.r the drawing, the front end of the plate 88 comprises a cam curface 91 cooperating with a spout 92 carried by the shaft 14 in order to move the plate lon8itudinalem0n in one direction and in the Another with respect to the magnetic head, the groove 85 and the slot 89, parallel, having a sufficient length to allow this movement. The spout 92 is connected at one of its ends to a hub 192 rigidly fixed to the shaft 14 immediately above the hub 162 and carries a roller
 EMI40.3
 cylindrical cam 93 at its opposite end mounted so as to rotate about a vertical axis and to cooperate with
 EMI40.4
 the virtic> surface, the 91.

   A tension spring or the like can be provided to push the carriage 88 forward and resiliently oppose the movement of the carriage backward under the effect of the roller 93.



  As can be seen, the carriage has a downwardly projecting pin 95 and the plate 5 is provided with a downwardly oriented pin 96 for securing the spring 94. The pegs are rigidly attached to the plates and the spring.
 EMI40.5
 is stretched ..; ntr ..:. they from!: 1a: 'J..è1'0 a to oppose their cLparo, brand under the effect of ": .OUV0 ..: ..; n't V:.; 1.' S 11 e.:!:TlÈ:T0 of the truck.



  This? P, ut :::} 0; l't0r le gn.l .., t .7.1'.m 07 (lù so that it dài, 1-ce with cL. =. Iot l; ' J .10 preferably it u3t solicited \ '\ .. 1': 3 1 roller 8G by a r <:: s * i, t or some other avg <n

  <Desc / Clms Page number 41>

 suitable elastic. As can be seen in the drawing, the roller shaft 87 is mounted in a vertical position on one end of a horizontal plate 97 which is mounted below the carriage 88 so as to be able to oscillate about a. axis or bolt 98 rigidly fixed to the carriage. The opposite end of the plate 97 is resiliently connected to the ankle
95 placed at the front end of the carriage 88 by a tension spring 99 stretched between this ankle and a downwardly oriented ankle 100 carried by the plate 97.



  Because the pin 98 is between the pin 100 and the shaft of the rotating roller 87, the plate 97 is biased clockwise by the spring 99, so as to push the free roller towards rear, towards the continuously driven roller 86.



   In the illustrated embodiment the shaft of the free roller is separated by a certain distance from the lateral edge of the horizontal carriage 88 and protrudes upwards above this plate through an opening drilled in the plate 5 which allows movement. pivoting and longitudinal axis. The clockwise oscillating movement of platen 97 is preferably limited so that free roller 87 is moved forward to be away from its tape driving position in which it is. in contact with the feed roller 86, when by a forward movement the plate 88 is moved away from the magnetic head 7.

   As can be seen in FIG. 6, the guide finger 83 closest to the feed roller 86 is in contact with the free roller 87, so as to limit the tilting of this roller

  <Desc / Clms Page number 42>

 in the direction of clockwise, when the plate 88 is brought forward by its spring 94. The free roller biased by its spring moves away from this finger 83 when the plate 88 drives it towards the rear in the tape feed position, in contact with the tape which is on the roller 86 as seen in Fig.4-.



   The plate 97 and its axis 98 support the free roller 87 in an exactly determined position, its axis being vertical and parallel to the roller 86, the position of which is also precisely defined, so that a uniform pressure is applied to the flap by the feed members 86 and 87 during the feeding of the ribbon. The tension spring 99 is chosen so as to give the desired frictional pressure between the feed rollers, and the free roll is preferably seen from an elastic rubber sheath or similar device ensuring its contact with the. ribbon.

   The rubber deforms by the pressure exerted between the feed rollers so as to prevent the rubber from sliding on the rollers. the magnetic head 7, the guide fingers 83, and the rollers 86 and 87 are arranged in such a way that the machine can operate with a minimum of distortion, jerk and parasitic vibration.

   The described tape feeder and feeder is of an inexpensive type capable of operating efficiently at relatively high tape feed speeds on a magnetic sound recording or reproducing machine. high fidelity, containing high-quality, high-quality electrical and electronic equipment.

  <Desc / Clms Page number 43>

 



   A U-shaped support 101 is arranged below the plate 5 and is rigidly fixed thereto by bolts or the like,
The holder can carry any suitable device. conch inside the box or crate 2 for driving the feed roller 86 and the drive roller 105. As can be seen in the drawing, it is provided in the crate 2 under the support 101, an electric motor 102 at constant speed, and the top of the motor housing is provided with a horizontal rectangular plate 103 bolted or otherwise rigidly fixed to the support 101.



  The motor has a vertical cylindrical shaft 104 oriented upwards, coaxial with the roller 86 and integral with the latter which also has the shape of a cylindrical shaft. A synchronous electric motor, a hysteresis motor, or any other constant speed motor is suitable for driving the shaft 104.



   A cylindrical outer-shaped roller 105 for driving the reel is mounted above (the plate 5 behind the feed rollers and the magnetic head, with a view to moving with the carriage 88 in a motion. - Back and forth towards the store contained in the chamber 12 .. This roller has a height above the plate 5 lower than that of the magnetic head 7 and the upper part of the notch 53,

   so that the magazine can slide above the roller to come into the active position in the chamber 12. An arcuate slot 106 is formed in the plate 5 to allow a horizontal oscillating movement of the drive aglet 105.



   Any suitable device can be provided

  <Desc / Clms Page number 44>

 
 EMI44.1
 to couple the shaft 104 av 0C 1 e '; ..' "01:". ' - 'l:':.!. "!," 5 while allowing the movement of c "'.. 1 (.;' rcé? Ī¯.-1.-:",;. '!. l disc 21 of the tape spool on SÍ, ; Y.,;] J ..; ',', 't .; in ± 2 ,,;' r ::; d of the movement of the carriage 86. iL "J: <". i: 1> === :, the device shown in the drawing e # tz :: ¯r¯¯¯.: f; w C" ç '"..,: L illustrate the principle of the invention er 1 ,: #: 3 tJ. "" -. -: -: !!; ..; 1. ± c, by various others r: lsCaniS! ï: 9S w: îi '': o7i s' "). '; ... ¯¯ üa '1.85 foucidons needed in a way sJ e; =; 5 î;, 1, # .-: i::.,.; ..- i.j -i v j = ja ± or more
 EMI44.2
 efficient.
 EMI44.3
 



  Retort can be seen on the .ù>: 1; ... =, i drive device for roller 105 is C ':' J 'L 1 j t. z ii, l, .lt large pulley 107, \ .l1 -: .. e small pulley 108 st lb ,; : ...: k -'-; ":; rj (.1: ('-:;. 808 109 made of bear flexible material 6t: ...,>. ¯. =.' The 'i rubber or a material az> lo uN in r 5 .., i eyī the rotation in the direction of the needle to'i.; n; ...; tcnt: c8 d0 the shaft 104 in a rotation in the opposite direction carried out by the roller 105 around Bor / axis; irl> ii ## 1 .. The large pulley 107 is coaxial with the motor shaft 104, and rigidly fixed
 EMI44.4
 to it so as to rotate simultaneously with it.

   The
 EMI44.5
 small pulley 108 is coaxial with shaft 118 of gaist 105 and rigidly attached to this, shaft,, 1 ... 3Ei, 3, c, 4.v; the angular speed of the roller d t ent: r'8.inc; '! 1s: nt] 05 shown in the drawing is greater than that of the feed getl.-5t
 EMI44.6
 86.
 EMI44.7
 



  We can predict a ra-i s;,., ¯,: -,. :. <, ¯: ¯.! , r <. \ 9 cJ. ':' Ol: ': ru.e to bring the roller 11 .., - I -, "', .. n =; i; e R ç3::, e,. I take with tape spool. G011 (':, ()' "I- :?" 1f [, it; on l ,; drawing, the shaft 118 is carried 1l '.. # == i, 1. =, - i, =, z: Iriotal 110 mounted above the support; t 101 <=; ", 1, if # .p.i, it; lc, to oscillate horizontally around a vertical axis. L3 plateau
 EMI44.8
 110 extends laterally at one of its ends from

  <Desc / Clms Page number 45>

   of a vertical axis 111 and is arranged to oscillate around this axis which is rigidly fixed to the support 101 and protrudes on the latter upwards.

   The end of the plate 110 mounted on the axis 111 can be widened or provided with a boss integral with it, if desired, so as to suitably support the plate, in port in a horizontal position.



     The opposite end of the plate 110 is shown in the drawing provided with a vertically projecting tab 112 pierced with a small circular hole of a size allowing the passage of a sliding cylindrical rod 113 arranged longitudinally.

   This rod has an outside diameter slightly smaller than the inside diameter of said hole and is provided with a head 114 at its rear end with a diameter greater than the opening and which comes to rest against the tab 112 to limit the backward movement forward of the rod towards the control shaft 14. The rod is provided with a radial flange They situated in front of the tab 112 and in contact with a relicoidal compression spring 116 coaxial to the stem.

   The compression spring is disposed between the flange 115 and the tab 112 and acts as the tension spring 99, so as to press the drive roller 105 towards the tape spool when the carriage.
88 moves rearward away from shaft 14.



  When the carriage is moved forward in the direction of the shaft 14, the spring 116 advances the rod 113 until the head 114 comes to bear against the tab 112.



   Tray 97 is shown in the drawing provided with a downwardly projecting tab 117 which contacts the front end of rod 113 when the carriage

  <Desc / Clms Page number 46>

 
 EMI46.1
 is brought back zen:; ;shoot . .... - e ': .- .'.-.' L.ande. A c-ras ae '' -. =. # ".-- suitable organ on top of the supg Jrt? 2 Cl - - -: = .... g.:'l.Ei;x 'can be provided the frontal part of 1 =. ti: re Jl 1; = r i ..: ..-.; i 1. e; at, -. s.4 .. dear any movement 1c: 2'f - '¯ i% Gi e'c z] .t: 1;> - == 1. µ c '-'..-. e jj .- i 1. ie outside the path of ct't'2 p: alû ,:.



  When we f i; 1 t t: J; i r. :. <. # r 1 '-1>. ... counterclockwise Q'L1Y = '.. against for 1' '' .'- "-. '.' ':. la. = - .. r 1- .. i.:> x # "marchu" (1.1) lYdlClk3% - jLCl' '1.:-, i. ->;.; #: = = - i. ..; ':.: -; .. i 1-.' 'tray 97 carries pi r the carriage sc! Lt .¯ .... ¯ ¯,: .. =:. - = 1 - :: -. =; - .5 1. i> 1-; ± n a .; td <z the tree., L. ., CC ; : <; == <nd .i:.:;.: '.....-....-.-... ¯.¯¯ ¯ .... ¯¯- .. placed in active position of uarj la' .: i1¯ = .¯ :: ... ''. '..; .'-.-. i 'i.tcau.



  97 moves backwards 3 '!' C, 1:; , -,! '; .''- .i. i- 1. i # -. = 7 ..T: i. #. i:.> # a1 = contact of the tape and the 117 r. + j> .i. = -: 1 .J: 1..i # = JJ..3. <r,.; rs 11 rear ,, thus compressing 1; -. r - ;;.: ¯ \ 1 - .., sS:,. ¯s¯¯: -t. read plateau 110 in reverse direction i-j-li.ss = 5 ' <ii; .i ..ontro, GtL.-3na.nt lc pebble 10 '.., .r # -; c l '' - '. i. ": ..'.- ..: t.; 3 ufj. contac't with the carrier disc d, -, the coil i' '' ..! '. i-. i., oiit ''. c in the store. When turning 1 1- '. Uh'u' in ncjis contrary until popition ï-r'2'ti ii:. \ ..'-; ' '.' '' 'T' 1- ;. ï 'i; ç ¯ 1, shelf 97 E: U leg 117 st j- ---' /, y'5 1'vant and 10 shelf 110 is free to 'oz <: 1- 1- 1 d>:. 5. =: =. .¯ # 5. =: I #u to .-,. -.i; .. 1 los of a dontre.

   The spring due; ' at 5 . ¯ ¯¯ 116; j u. i3 rCEr .à 'if f 1 5 a n t e to produce a slight e;.' r.i ... it 1: 5 #x 1 1; ;; C3atrT'C'1 elastic 109 when the roller, 105 1? Lt ± .j, y'Li-j <)>; centers the ribbon spool. The tension of ... ¯ ¯¯. ¯. a .- = <;> - oe. effect of making the plate oscillate 110 s, g; = j 1 -¯. = ¯ de-j spur of a nontra and # s é> n x. -at r 1 I- '¯ .1 t' '' .e i - == j = r ..; ; , not .; r: r'i, ".-; when the carriage 83 is moving.7. =. f :. ': d'az'x'¯v- en: ¯.; r =, r-à en direction of l 'tree 14.

   It is appropriate to not.yr e on piut
 EMI46.2
 
 EMI46.3
 mnttrà an route I notor 102 en .. ', w = ttr r-à = - f l'mi des 1 = ou-

  <Desc / Clms Page number 47>

 
 EMI47.1
 'tons 3 -3t 4. before anonor lo button 15 in the "on" position and that the rollers 66 and 105 can Stl't C.11't, # ± .Îliôfi by the notour in a con.t way ; ir.: ... 1.O "This is why the ga8. <: = drive 105 must be released from the coil of â 6., ::! 8 to stop the '' Ttf, jS¯1J'n1 ^ Y.'rt: of rotation of this coil if the motor F51, > ctrs, q <>, <J i -Js: ;; not stop, The elastic belt 1: iC1.l: r fjj..C "C rJqllo r:

   G; t; : 93.S a: f: r01Ïf3f; 1 !! \ cour: COl.0 el :: lf, t ... L (111D 109 realized cotte G ri, Being étOlh ".l9 that notch 53 is located ( the piÔf 'mi == àixtaz; = s <1 t 1 edge, -, rJ S da. pebble 105 is yellow #> a.ioJin; 3n% placed sonsibicci-have at i -1-ch ;;. o ga 01; -, 0) is7'v v .'.... 'n .....:. G.d.4iiyE: F.1 lJ [; 1, ce SCll ± 1: J .. w. 3mcnl: l11.:1-C 10-. min between the longitudinal parts of the guido 10 so as to enter Gatto ecDn () l, .1X'O when we bring 10 button 15 to the "on" position.



   As is evident from the request do
 EMI47.2
 the aforementioned patent 4,59,313: 1a. friction produced between the turns of 1 ru.ban winding in the coil is. scaled down
 EMI47.3
 â a minimum when the angular velocity of the periphral coil in-'Gô: tJ.8U "" f ;? of the winding is ilg-lrenent su.p6rieure at the angular speed of the rotating parts of the coil in contact with this turn.

   The diameter of the part of the roller 105 which is; in contact with the reel can be chosen so as to give a suitable angular speed to the disc 21 of the tape reel, relative to the linear speed
 EMI47.4
 average of r'l.1bal1 .., Par e: cw3c with a winding-carrying disc with a diameter dOllü6 the diameter of the roller 105 with respect to 1: i, R11 ..G;. '.'. "t. When the SS "tape winding turns are used, about the end of the tape and less than about the length of the tape have a slightly greater angular velocity than that of the disc.

   With such a provision
 EMI47.5
 tion the friction is reduced suf3s in so that a

  <Desc / Clms Page number 48>

 winding tape from a fairly large number of turns behaves satisfactorily.



   It is evident, however, that the angular speed of the rotating disk supporting the winding, and in contact with the drive roller 105, varies with changes in its diameter, unless the peripheral speed of the roller 105 varies. Different means can be provided to modify the peripheral speed of the disc.
21 or of the roller 105 with respect to the glue of the feed galct 86, so that a disc of any given diameter and the part of this disc which is in contact with the internal peripheral turn of the disc. tape can rotate at a predetermined angular speed, so as to reduce the friction between the turns of the winding.

   As seen in the drawing, the portion of the shaft 118 protruding above the surface 6 is arranged to receive a removable cylindrical bush of small or large diameter 119 or 120. Each bush can slide vertically and exit the end of the shaft, but it is driven by the shaft when mounted there and cannot rotate relative to the shaft. These bushings are preferably made of flexible rubber or a rubber-like material so as to prevent the bush from sliding relative to the shaft or else the bush relative to the disc which carries the winding. Each bushing also has a dimension allowing it to fit into the notch 53 of the combined magazine, when the drive roller oscillates about its pivot axis.



   The small rubber sleeve or sheath 119 is shown in Fig. 4 in frictional contact with the disc
21 of the small coil 20. If the large coil is to be used

  <Desc / Clms Page number 49>

   magazine A 'and the large' tape spool 20 ', we remove the small sleeve 119 and replace it with the large sleeve
120 as seen in Fig. 14, where the large bush is shown in driving contact with the disc 21 of the large spool while the guide fingers 83 and free roller 87 feel in their extreme rear position.



   The magazine A or A 'may have a shape allowing the rubber bush of the roller 105 to move through the notch 53 to come into contact with the disc 21 of the reel 20 or 20' for driving this dam. It is obvious that the diameter of the rubber sheath mounted on the shaft 118 can be varied depending on the diameter of the disc carrying the winding which it drives, as well as the diameter of the frustoconical hub of the disc; so as to drive the disc at the desired angular speed with respect to that of the inner peripheral coil ;, independently of dE; the size of the tape spool.



   It is often desirable to provide a means to limit the rearward movement of the roller 105 in the direction of the web of tape, so that a magazine can be brought into the active position in chamber 12 and moved toward the web. before the ribbon which is contained therein over the head 7, without the ribbon reel cooperating with the drive roller * Such a device can be used with magazines having small diameter reels and a relatively long ribbon length. short, because this tape can be fed satisfactorily without driving the tape spool.



   As can be seen in the drawing, the rearward movement of shaft 118 is limited by the rear edge of slot 106 so that this shaft cannot go round.

  <Desc / Clms Page number 50>

 away to come into contact with the disc 21 of the spool 20 or 20 ', when the rubber sheath 119 or 120 has been removed. Therefore, the driving of the spool 20 or 20' cannot occur, unless that the sleeve is mounted on the shaft 118. The small magazine A and its spool 20 function perfectly when the sleeve 118 is removed, as long as the length of the endless tape 17 is relatively short (for example less than 45 meters about).

   However, when using larger magazines containing several tens or hundreds of meters, it is preferable to drive the coil positively by means of the roller 105. By driving the coil at the most suitable angular speed, it is possible to use back endless ribbons having lengths up to about 360 meters.



   If the large bushing 120 of the drive roll, for example, is permanently attached to the shaft 118 and is arranged to drive the large spool 20 'at the proper speed, magazines intended to contain the small spools such that these no spools can come into contact with the sleeve 120 but are only driven by the friction of the tape. In this case, the slot 106 pockets the movement of the sleeve 120 back and forth against the smaller reels.

   If a large magazine A 'is used with 90 to 180 meters of endless tape, the reel 20' is driven by the sheath 120 of the drive roller 105; but if one uses the small magazine A containing for example less than 45 meters of tape, the reel 20 is not driven by the roller 105.



   We can notice that. when turning the drive shaft 14, the tape coming out of the magazine is put in place

  <Desc / Clms Page number 51>

   automatically between the feed rollers, the pieces being automatically brought into the position ensuring the drive of the flap, and / or the magazine is automatically ejected-mounted from the chamber 12. It is obvious that these setting characteristics the automatic feeding and ejection according to the invention can be applied very advantageously in various automatic machines (automatic music distributor, and "juke box" for example, or various machines allowing to automatically pass a certain number of stores one after the other).

   However, as it appears in the drawing, the apparatus is semi-automatic rather than fully automatic; the placing of the magazine in the machine is done by hand rather than automatically, and the shaft 14 is controlled by hand rather than by means of an automatic electric control.



   It will be appreciated that the tape setting and feeding apparatus shown in the drawing is picked up and employs an expensive construction, so that it can be employed on small portable recording devices. or reproduction, and that it is also of a type suitable for use with avantago on expensive high fidelity machines employing higher tape feed speeds. Magazines of the type shown in the drawing as well as ribbon guides can be mass-produced, at ridiculous cost, by plastic molding. The tape spools can also be made from inexpensive plastic or formed by simple molding operations.

   The permanent metal parts of the tape placing and feeding apparatus are more expensive than the plastic parts.

  <Desc / Clms Page number 52>

 ticks contained in the removable magazine, but most of these parts can be manufactured at relatively low cost by bending flat metal bands and simple machining operations. The roller 86 and the guide fingers 83 can be precision machined parts from the most interesting metals available, without appreciably increasing the cost of the mechanism.

   The roller 87 can also be a part of the highest quality without unduly affecting the cost price of the apparatus, since there is no multiplication of expensive parts as a result of the arrangement of the free roller. inside the removable magazine. The machine can have the precision and speed of tape circulation that a high fidelity machine requires even though the guide members 41 in the magazine are simply molded from plastic and do not ensure the tape is in a very precise position.

   Thanks to the improved construction of the mechanism according to the invention, it is possible to manufacture at a reasonable cost a machine capable of operating efficiently with a given length of tape for more than 500 hours, whether continuously or intermittently, and this with less than 0.3 percent of parasitic vibration and flutter.



   Since the invention eliminates the need for a winding shaft, a feed shaft, complicated pulleys and drive belts, rewinding mechanisms and other parts normally used in machinery. high quality magnetic recording and reproduction of sound employing two reels of tape rather

  <Desc / Clms Page number 53>

 than an endless ribbon, it is possible to manufacture machines comprising the apparatus for placing and feeding the ribbon according to the invention, at a reduced cost price compared to the elements of the invention. usual type and having comparable running characteristics.



   The electrical equipment employed in the crate 2 can vary to a great extent and can be relatively simple in an expensive machine or else ploy in an expensive high fidelity machine. For example, the electric motor 102 may be of a type operating at several different predetermined speeds, in which case suitable switches or similar commandos can be provided for the choice of the desired constant speed. The speed of the motor is usually set so as to give a web speed of approximately 4.8 to 38 cm / s.



   In more complex machines a means may be provided for automatically stopping the movement of the tape after a predetermined time or in response to the movement of the tape coming into a predetermined position. For example, if a given pilot frequency is recorded at a predetermined point on the tape, the feed to the tape may be automatically stopped in response to the pilot frequency signal when that part of the tape arrives at the magnetic tet or some other fixed point. This allows the endless tape to be easily stopped at the desired position.

   It is obvious that an easy loading tape recording and reproducing machine has many useful applications in cases where sounds of a given frequency must be recorded on the tape for control purposes. automatic in order to produce different movements in

  <Desc / Clms Page number 54>

 a given order or in synchronism with a sound recording.



   The operation of the magnetic tape recording and reproducing device 1 is clearly understandable from the above description. The commando button 15 is normally in the "off" position (A) as shown in solid lines in FIG.



  When the control knob is in this position, the cam surface 80 of the lever 44 and the cam roller 79 are in contact and the rear part of the lever 44 is in the raised position as it and shown in solid lines in Fig. 3 and in phantom in Fig. 5 At this time the locks 55 are in the high position, shown in phantom in Fig. 6, the roller 93 is out of contact with the cam surface 91, as seen in the figure. Fig.2, the guide fingers 83 and the rollers 87 and 105 are in their front position closest to the shaft 14;

     as seen in Fig. 2 and 6, the lifting rods 63 are in their rear position, as in Fig. 6 and the pawl 69 is in its locking position, as in Fig. 6, its beak 70 then being on the path of the stop 68.



   Unless a magazine is brought in, the active position is in chamber 12 and as long as this is not done, or as long as the pawl does not swing in the direction of the needles of a watch, the button 15 cannot be rotated counterclockwise to the "on" position. However, the pawl 69 does not prevent the control knob from rotating clockwise.

     Qiand we rotate the button 15 for example ten to twenty degrees clockwise

  <Desc / Clms Page number 55>

 from the "stop" position to the "ejection" position (E) shown in phantom in Fig.l, the cam roller 160 comes into contact with the cam 59 thus lowering the rear parts 57 of the locks into their position erased below surface 6, as seen on Pig. 7 and
8.



   The main button 15 may be actuated by hand or automatically by means of a spring or other suitable means to return it to the "off" position before any magazine is engaged in the chamber 12. The springs compression 61 return the latches to their locked position, after the knob 15 has been turned counterclockwise to the "off" position or beyond.



   When the front part of a large or a small magazine is introduced into the chamber 12, the parts assume the positions shown in Figs. 2 and 3. At this time, the tones 163 back ejector rods are held by the wall. vertical flat constituting the front part of the store substantially in contact with the guide 10, the rods 63 are held in their front position so as to keep the pawl 69 out of the path of the stop 68, the tape guides 41 are in position. raised position as seen in Figs. 3, 10 and 12, so that the lower edge of the right part of the tape stretched between the guides is above the edge of the parts 7, 83, 86, 87 and 105,

   the locks 55 bear against the front edges of the slots 156, as shown in phantom in FIG. 10, thus retaining the magazine in the active position and, opposing the movement of the magazine under the effect of the ejector rods, and parts 87

  <Desc / Clms Page number 56>

 and 105 are in their forward position out of contact with the tape or the tape spool.



   With the magazine in the active position in chamber 12, the knob 15 can be turned counterclockwise by a predetermined angular distance (which may be, for example, about ninety degrees as seen in the drawing, or other suitable value) from the "off" position to the "on" position (M) shown in Fig.1 in phantom. If desired, the cam surface 80 may be shaped to limit the counterclockwise rotation of the arm 78, or some other suitable means may be provided for pocketing the rotation of the shaft. 14 and button 15 in this direction, beyond the "on" position.



     Normally the commando buttons 3 and 4, or the switches which can be provided for this purpose, are set to start the rotation of the electric motor 102 and to energize the electronic equipment while the main button 15 is on. "off" position, but if desired, the electrical equipment can be cut off when you bring
 EMI56.1
 the main knob in the "on" position, in which case Isc drive rollers are brought to the ribbon feed position and then start the 9.lÜ:;.: nt <tion says ru "t ::: # From the moment of starting the :::. c-t:! .. 1.

   A t ': 11 ::. 1; -crj to do can "-'- rl- used, '' '-' '' '' '' 'y ---., --.....-"' "" 1 "" "' 1 '' '' '' '' '' '' -... '"' '-" "- dee 1.>" J, # <xz j gour 17 ,, '; ,,, - ,, -' --j "') 1 to, = <liz4 ùbriy.5c * However, when we have = 4> -14 CC? "i ri .:.:. ¯ 1.! t ¯: Z t'G: -Z ¯ ¯, electric by means of let us sink 3 c¯r -: ': 1; l,: ¯ ... IC ..; ...-.-- ..:' ./ '; sance, read speed etc ... ue we want , it is better to

  <Desc / Clms Page number 57>

 Usually to let the motor 102 run uninterrupted while feeding various magazines successively into chamber 12 until use of the machine is stopped for a considerable period of time.



   While moving the control button to the "on" position, the following changes take place successively: a) roller 79 follows the surf, ---. the cam 80 on the anterior part of the lever 44 and forces the semi-circular part 76 of the lever 44 to rise up to the weight indicated in solid lines in Fig. 5, whereby the guides 41 are lowered by 'a predetermined distance (for example up to the position shown in phantom in Fig. 12) and the part of the strip 17 between the guides is lowered between the rollers 86 and 87 and between the guide fingers 83 and the magnetic head 7 in a horizontal position of coincidence with the grooves 84;

     b) then, the roller 93 following the cam surface 91 forces the carriage 88 to move back towards the magazine and thus brings the guide fingers 83 against the tape and applies the tape against the curved front face 82 of the magnetic head 7 and it is made to fit the formr: ot c) once the tape is placed fairly exactly we position in the grooves 84 and in contact with the face 82 of the magnetic head, and during the final part of the movement of the shaft 14 in counterclockwise, the roller 87 and the roller 105 are returned to the rear by the springs 99 and 116 respectively} into the ribbon feed positions.



   Preferably the feed rollers come on

  <Desc / Clms Page number 58>

 friction contact with the tape tight enough to be able to start feeding the tape at the same time as the drive roller 105 begins µ. turn the disc 21 or just before this moment, and at least at the moment following the installation of the tape against the head 7. In the device shown in the drawing, the roller 105 begins to rotate the spool 20 or 20 'substantially at the same time as the rollers 86 and 87 begin to center the tape 17.



   It is evident that the tape supported between the guides 41 is substantially to the right or in front of the front surface of the magnetic head and the roller 86, and behind the free roller 87 and the guide fingers 83 before lowering. tape, so that the tape is not liable to encounter any obstacle causing the lowering of the guides 41 and does not otherwise interfere with the lowering of the guides.



   At any time you can turn the knob 15 clockwise from the "on" position to the "off" position to interrupt the drive of the tape spool by the rollers 86 ot 105 respectively, normally trained continuously.



  When the knob is rotated in this direction, the roller 93 moves away from the cartridge A or A 'and the spring 94 acts to bring the carriage 88 forward towards the shaft 14. The axis 98 moves with the carriage and one of the fingers 83 comes into contact with the free roller 87, thus separating the roller from the tape which it was compressing, when the fingers; 6 guide separate from the tape, / Or. just before.

   While moving carriage 88 to

  <Desc / Clms Page number 59>

   forward, the rod 113 is pushed forward by the detent of the spring 116 and the roller 105 is brought into a position where its frictional contact with the disc 21 is interrupted by the effect of the contraction of the elastic belt 109 and leaves this disc substantially at the same time as the free roller 87 leaves the ribbon.

   In this way the coil
20 or 20 'stops rotating while the ribbon feed is interrupted by the feed members
86 and 87 when the shaft 14 is continued to turn clockwise to the "stop" position, the spring 81 contracts and causes the lever 44 to tilt, the springs 42 relaxing to lift vertically. the tape and bring it into the cast iron 52. The magazine can then be extracted by turning the button 15 to the "election" position so as to release the locks 55 and allow the magazine to be withdrawn backwards under the action of rods 63.



   In Figs. 15 to 20 is shown a variant of the invention, in which it is possible to use on the same tape recorder reels of tape and removable endless tape magazines. In Fig. 15 shows a portable tape recording and reproducing mechanism 1a. provided with usual electronic equipment contained in a rectangular box or case 2a. The electrical equipment is switched on or off by means of a single control button 15a which makes it possible to adjust the power and / or other variables, such as speed, tone etc ... by via a vertical shaft 14a.

   The button 15a can also control suitable switches so that it is possible to record a message when the button is tipped in one direction from a predetermined position and to play back a recorded message when the button is turned.

  <Desc / Clms Page number 60>

 turn the knob in the reverse direction.



   The tape recorder 1a comprises a flat metal top 200 placed at the upper end of the box 2 and a lid 201 which substantially covers the plate 200. The entire top of the lid is flat except for a portion in upward projection 202 which forms a rectangular housing of substantially uniform height over its entire width.

   Emerging from it. upper surface of the plate 201 are provided a feed roller 86a driven by a motor, two laterally aligned reference pins 203 intended to ensure the positioning of a removable tape magazine in the vicinity of the housing 202, a ,:

     magnetic transmission head 7 disposed between the gropings, two vertical pins 204 aligned laterally, intended to ensure the positioning of two usual tape spools 205, a U-shaped magazine guide 206, and two tape guides aligned la- terally 207 intended to dispose the magnetic tape coming from the coils 205 near the face of the magnetic head 7a and the surface of the roller 86a.

   There is provided a free roller 87a covered with rubber intended to bring the tape into contact or out of contact with the roller 86a, in order to start or stop the feeding of the tape; and, if desired, one can also provide guide fingers similar to the fingers 83 of the reproducer 1, to ensure a suitable arrangement of the tape against the head 7a, or else a drive roller of the reel similar to the roller 105 for drive the endless reel of tape contained in the magazine. The studs 203, the U-shaped guide 206 and the tape guides 207 are placed so as to properly dispose a removable magazine, protected against any external contact, similar to magazine A,

   

  <Desc / Clms Page number 61>

 in a predetermined active position near the part 202 'as indicated in phantom in Fig. 15.



   There is provided within the housing 202 a device for lowering the tape in the magazine to an operating position between the feed rollers.
86a and 87a and close to the magnetic head 7a. This device may be identical to the U-shaped ribbon lowering lever 44 and the conjugate control mechanism, inside the cover 13, but it is preferably constituted by levers or fingers. lowering of the ribbon capable of being brought back into the housing 202 when the magazine is withdrawn.

   As shown in the drawing, the housing 202 contains a pair of parallel tape lowering levers 208 arranged to be brought over the tape or swept inside the housing, as shown on. phantom line in Fig. 17, in response to the rotational movement of button 15a in one direction or the other. A somewhat analogous tape lowering mechanism suitable for use in housing 202 is shown in Figs. 24 to 27, as will be seen in the description below.



   The levers 208 are formed from a single symmetrical piece of sheet metal and are made integral by a transverse part forming an upwardly open arc 209 ensuring simultaneous movement of the fingers or levers 208.



  The levers are mounted on a symmetrical support 210 constituting a single U-shaped piece of sheet metal, provided with vertical side walls 211 and 212 and an end having a vertical wall 213 rigidly connected to the plate 200 by dcs screws. fixing 214. On the walls 211 and 212 of the support 210 are articulated the levers 208 by means of

  <Desc / Clms Page number 62>

 two bolts or pins 215 aligned laterally and fixed rigidly to the support 210 by nuts 216, and these side walls are provided at a point of them.

   upper edge of two stop pins 217 aligned laterally and facing inward, arranged to meet the upper edge of the levers 208 to limit their oscillating movement from bottom to top. The parallel levers 208 are pierced with elongate laterally aligned slots 218 having a width allowing them to slidably receive the pins 215. The mounting of the levers with pins and slots allows them to slide longitudinally and oscillate vertically around the axes 215.



   The posterior parts of the levers 208 located behind the axles 215 are biased downward toward the plate 200 by soft helical tension springs 219 stretched between fastening tabs 230 located on the rear part of the levers, and notches. or slots 221 formed in the bottom of the rear wall 213.



  The springs provide resilient resistance to the vertical oscillating movement of the levers about the axes 215e apply the levers upwards against the legs 217 and urge the parts of the levers forming the anterior end of the slits 218 backwards against the legs. axes 215 as indicated in phantom in Fig. 17.



   A device is provided for actuating the levers to advance them over the tape and to effect lowering of the tape in response to the rotational movement of the drive shaft 14a. As seen in the drawing, the drive shaft has an upper end 222 having a semicircular section, which projects above the housing 202 and which removably fits into

  <Desc / Clms Page number 63>

 a similar volume cavity provided in the button 15a. and the shaft is held in position relative to the plate
200 by means of a bearing 223, so as to rotate around, a vertical axis.

   A horizontal symmetrical control bar 224 is rigidly connected in its counter to the shaft 14a between the bearing 223 and the top of the housing 202, by means of a cylindrical pin 225 passing through the bar and the control shaft. and committed to the press. Rigidly connected to the bar 224 at its opposite ends, there are two identical vertical axes 226 screwed into the bar at an equal distance from the shaft 14a. On these axes are rotatably mounted two vertical cam rollers 227 arranged to come into contact with the portion 209 in the form of an arch so as to move the levers 208 longitudinally.



   The central portion of portion 209 is transversely arcuate and curves so as to form a concave cam surface 228 on its rear edge and a slightly curved convex cam surface 229 on its top face, the cam surfaces of portion 209 located on the opposite edges of surfaces 228 and 229 being relatively flat as is best seen in Figs. 16 and 19. The surface 228 preferably has a radius of curvature equal to the distance between the axis of the drive shaft 14a and the contact surface of the roller 227 as seen in Fig. 16 of such that the levers 208 are not moved longitudinally when the gallows 227 move along the surface 228.

   As seen in the drawing, a shallow arcuate notch 230 is provided in part 209 midway between the levers 208 and is intended to receive one of the rollers 227 and thus to retain the rollers and bar 224 in. a parallel longitudinal position

  <Desc / Clms Page number 64>

 to the levers, as shown in Fig.16 there is a dot-and-dash line, when the button 15a is released and the tape is in the active position as seen in Fig.18.



   The opposite ends of the bar 224 are curved downwards so as to form two identical tabs 231 intended to come to rest on the cam surface 229.



  These legs are at a distance from the plate 200 greater than that which separates this plate from the opposite ends of the part 209, so that the levers 208 are raised when the bar 224 is in a position similar to that shown in solid lines on the figures. Fig. 16 and 17. However, one of the tabs 231 contacts the cam surface 229 and gradually lowers the part 209 and the tape-acting portions of the levers 208, in the position of FIG. 16, as the bar 224 is rotated from the position shown in solid lines in Fig. 16 to the longitudinal position shown in phantom in this figure.

   When the bar 224 is rotated in either direction from this position, the tabs 231 separate from the cam surface 229 thus leaving the portion 209 to rise under the effect of the springs 219. When the. bar is in a predetermined neutral transverse position, perpendicular to the levers 208, as the glue shown in phantom in FIG. 16, the levers are completely erased as seen in FIG. 17 in phantom.



   It is understood by referring to the drawing, how one of the rollers 227 came into contact with the twist of the particle; 209 when the bar turns in one direction or the other from the neutral position, and how the levers are swept forward by this galot, when one continues to turn the button 15 in the same direction. Of course, we

  <Desc / Clms Page number 65>

 can give surface 228 and notch 230 a suitable shape to allow portion 209 to properly oscillate relative to roller 227 during movement of the roller along this surface during lowering of the tape .



   The tape lowering mechanism which is shown in Figs. 15 to 19 is particularly advantageous in a tape recording and reproducing machine in which a message is recorded on the tape, the button being turned in a tone and in which a message recorded on the tape is reproduced, the button being turned in the other direction.

   Since the bar 224 and the transverse part 209 are both symmetrical with respect to a plane passing through the axis of the shaft 14a, the same sequence of operations (that is to say: advance - raising the levers, lowering the tape, raising the tape and removing the levers) by turning the button 15a of
180 degrees in either direction starting from a neutral or predetermined "stop" position, and the levers 208 are brought into the same position when the knob is rotated by a given angle from the position. neutral regardless of the direction of rotation.

   By turning the button 15a in either sound from an "off" position, the lowering of the tape and other operations necessary for the proper functioning of the apparatus can be carried out. control these operations by rotating the knob 15a in a sound during recording, and in the opposite direction causing the reproduction of a message.



   In Figs. 24-27 is shown a variant of the tape lowering mechanism usable in the machine 1a.



  The lever control mechanism in these figures is not

  <Desc / Clms Page number 66>

 symmetrical and does not allow the control knob to be rotated 360 degrees as in the device described above and shown in FIGS. 15 to 19, but this mechanism operates in a very similar way to this device and has advantages that the latter does not have.

   The mechanism comprises a vertical control shaft 14b which can be turned using a suitable knob (not shown) and a lever 44a made of sheet metal forming a single asymmetrical piece in the shape of a Ù likely to oscillate vertically like lever 44 dcs Fig. 1 to 8, and intended to raise and lower the magnetic tape contained in a removable magazine, it responds to the rotational movement of the control shaft. -The lever 44a comprises a transverse portion 232 and two parallel longitudinal side parts forming arms 233 integral with the opposite ends of the transverse gate, intended to lower the tape.

   A substantially horizontal plate 234 is rigidly fixed to the rear part of the lever 44a between the arms 233.



   The lever 44a is mounted so as to slide longitudinally and to tilt vertically on two vertical rigid sheet metal supports 235, parallel and aligned laterally, provided with horizontal tabs 236 folded inwards, near their opposite ends, and firmly attached to the tray 5a of a recording and reproducing device 1b; they also include two vertical ribs 237 directed inwardly occupying substantially the entire height of the supports 235. The ribs 237 are pierced with two narrow vertical slots 238, of a width slightly greater than the width of the arms' 233, intended for guide the arms in their vertical and longitudinal movements.

  <Desc / Clms Page number 67>

 



   The supports 235 are pierced with soft pairs of laterally aligned longitudinal castings 239 and 240 of uniform width and the arms 233 are provided with soft pairs of laterally aligned cylindrical rollers 241 and 242 having a diameter substantially equal to the width of the slits arranged so as to roll substantially over the entire length of the slots when the arms are advanced or retracted. Rollers 241 and 242 are rotatably mounted on arms 233 on two horizontally spaced longitudinally spaced axes and are arranged to overlap the edges of slots 239 and 240 to support the arms.

   The slots 239 are horizontal and prevent any vertical movement of the rollers 241, but the slots 240 are slanted downward at their anterior end so as to lower the rollers 242 as the arms 233 are advanced. 'approaching the front end of the slots, the arms 283 approach the position shown in phantom in Fig. 25 and in solid line in Fig. 26, in which the tape is lowered and is exposed in contact with the magnetic head and the feed rollers of the tape recorder 1b.

   The front back arm parts 233 have a reduced height and have a shape similar to the front parts of the lever 44 shown in FIGS. 1 to 6 to form a flat bottom edge surface 14 designed to come into contact. with the guides, supporting the tape and movable vertically, removable magazines, this surface 144a being horizontal as indicated in phantom on the Pig.25 when the guides are fully lowered !? .



  The posterior parts of the slots 240 are horizontal so that '!.' the arms can be advanced to a position above the tape guides mounted in the magazine before the surfaces 144a are lowered into contact with the tape guides

  <Desc / Clms Page number 68>

 for the lowering of the tape.



   The device operating the arms 233 is quite similar to the mechanism shown in Figs. 15 to 19 operating the levers 208, but no spring is necessary for the removal of the levers. This device comprises a rigid metal control element 224a co @ perating with the shaft 14b so as to rotate about the axis of this shaft. The element 224a is rigidly connected to an annular ring 243 mounted so as to slide vertically on the shaft 14b between two horizontal stop pins 244 and 245 passing through the shaft 14b and protruding from each side of the shaft.

   The ring is provided with two diametrically opposed V-shaped notches 246 intended to receive the lug 245 and is biased downward in the direction of this lug by means of a compression coil spring 247, a metal annular washer. 248 being interposed between the upper lug 244 and the spring 247 to limit the movement of the spring upwards.



  * The spring has sufficient force to cause the rotation of the element 224a and the advancement or removal of the levers 233 when the shaft 14b and the pin 245 are rotated, but allows the rotation of the pin 245 relative to the ring 243 when the element 224a reaches its limit of rotation in either direction.



   Soft substantially vertical cylindrical pins 249 and 250 are rigidly attached to opposite ends of arm 224a and are intended to form the non-rotating supports of two cylindrical cam rollers 251 and 252 as seen in Fig. 27. As can be seen, the roller 251 is mounted so as to be able to rotate about an axis inclined relative to the vertical by an angle corresponding substantially to the value of the angular inclination of the lever 44a so that

  <Desc / Clms Page number 69>

 the axis of the roller 251 is perpendicular to the table when the table is lowered to the position shown in phantom in Fig. 25.

   Roller 252 is also inclined but only at an angle about half of the previous one because roller 252 is withdrawn from slot 254 before arms 233 are fully lowered.



   The rollers 251 and 252 contact the plate 234 so as to slide the lever 44a forward and backward in response to the rotation of the control shaft 14b. The plate 234 may have any suitable shape to achieve the desired movement of the tape lowering loviors 233. The plate can be designed, for example, so as to allow rotation of the arm 224a do 360 degrees in both sounds. or to make a complete cycle of operations when the do commando dt: ns shaft is rotated one way or the other, as in the tape lowering mechanism shown in Figs. 15 to 19.



    However, as seen in the drawing, the rotation of the arm 224a is limited, and the levers can only be moved longitudinally in one direction by rotating the drive shaft 14b in the proper direction. Lo plate 234 is provided with two guide slots 253 and 254 intended to receive the cylindrical rollers 251 and 252 respectively. The slot 254 is rectilinear and perpendicular to the arms 233 but has a flared edge 255 which leaves an enlarged opening in order to receive the roller 252,

     the width of the slit above. edge 255 being uniform and substantially equal to the diameter of roller 252. The locking cast iron 253 is curved and substantially concentric with shaft 14b over most of its length so that lever 44a does not operate.

  <Desc / Clms Page number 70>

 
 EMI70.1
 ['.) ¯C1) .n longitudinal movement when the roller 251 is in this part of the slot. However, the cast iron 253 is bent towards the shaft 14b at its open front end so that the galot 251 imparts to the lever 44a a longitudinal movement over a short distance.

   The cast iron 253 has over its entire length a width substantially equal to the diameter of the roller 251, and is placed relative to. the web slot 254 such that the roller 251 enters the slot 255 before the roller 252 leaves the slot 254 and so
 EMI70.2
 that the roller 252 enters the slot 254 before 1c let.



  251 nor exits the slot 253 when the drive shaft 14 is rotated in the opposite direction. In Fig. 24 is shown the position of the element
 EMI70.3
 r:.: nt 22q.a when the ribbon lowering levers are raised and fully released. When the control element is rotated counterclockwise from this position, the roller 252 contacts the leading edge of the slot 254 so that the arms 233 protrude above. tape guides mounted in the removable magazine and the arm are lowered as the roller 251 enters its slot 253.

   By the time the roller 251 comes to the right of the curved part of the slot 253, the levers are in their lowest position as indicated in phantom in Fig. 25. If we continue to
 EMI70.4
 rotate element 224a counterclockwise back xiguill35 of a watch, to the position shown at 7i-. 26 the 1: rlcr <94, a no longer moves. Slot 253 limits the rotation of the arm in the. reverse direction 4 == .1 t.li ¯: S of a watch do such that the lug 24.5 of. the tree éi .. ::: wC: ¯.andC comes out of notches 246 if we try to cr>: zj, nuir é, ù turn (> n5 CC sense.

   By rotating 1 '± -rbr # 1: .Q dc-ns le:' :. back

  <Desc / Clms Page number 71>

 clockwise the lever can be easily returned
44a in its initial position of FIG. 24.



   Since the curved part of the slot 253 allows the shaft 14b to be still substantially rotated once the tape has been lowered to its lowest position, means may be provided for bringing the feed rollers into the drive contact. with the ribbon, and bringing the ribbon to a predetermined active position against the gently curved face of the magnetic head, in response to this rotation of the command shaft.

   The magnetic tape recording and reproducing mechanism 1b may be provided, for example, with a cam device similar to the elements 88-100 of the tape recorder 1, for feeding the feed rollers. in driving contact with the tape, and so as to press the tape against the magnetic head in response to the rotation of the shaft 14b, after the tape has been lowered and after the roller 251 has reached the curved portion of the tape. the slot 253. Thanks to such a construction, the positioning and feeding of the tape can be carried out automatically in response to the rotation of the drive shaft 14b.



   In Figs. 16 to 23 is shown a variant of removable magazine A2 according to the invention, this magazine being of a construction substantially comparable to the glue of magazine A shown in FIGS. 1 to 12 pt operating identically. The magazine or cartridge is constructed for application to the registration pins 203 of the tape recording and reproducing mechanism 1a, and may be used on mechanism 1a or 1b in combination with the tape lowering levers. 208 or 2335. In Figs. 15 and 24 to 26 is shown the mixed tared cartridge in the active position while in Figs. 16 'to 23 the details can be seen.

  <Desc / Clms Page number 72>

 do its construction.

   Like magazine A and the endless ribbon reel 20 contained therein, magazine A2 and its reel can be made entirely of an inexpensive plastic salt shaker.



     Corné as seen in the drawing, magazine A2 has a substantially rectangular front portion 256 and a semi-circular rear portion 257. The lower front portion of the magazine has a substantially rectangular cavity or housing 38a of a size allowing the 'ae be on the guide of the magazine 206 and on the magnetic head 7 and the rotary drive roller 86a, this housing being disposed midway between the sides of the magazine thus leaving the magazine front angles 258 and 259 of the same size .

   The store has a horizontal flat bottom of plastic 260 and a continuous vertical wall 39a integral with the bottom and forming an edge of the housing 38. Against the rear part of the bottom 260 is provided an annular boss 32a forming an axis for the coil, projecting upwards.



   A one-piece plastic cover 261 is mounted on the magazine A2 and is securely attached to it by means of a fixing screw 51a screwed in the axis 32a as seen in fig. 22. The cover has a wall 262 forming a continuous edge which covers the edges of the bottom 260.

   The edge 262 has a semi-cylindrical vertical end 35a concentric with the axis 32a and parallel vertical side walls 36a and 37a defining a cavity or chamber 30 in the magazine, of a size to accommodate a reel of magnetic tape. , and it also has a substantially rectilinear transverse frontal part 40a perpendicular to the sides

  <Desc / Clms Page number 73>

 
36a and 37a, above housing 38a. Solidarity with the wall
262, a horizontal top 50a completely covers the housing 38a and the passageways for the tape between the wall 39a and the edge 262.



   As can be seen in the drawing, the top and the edges of the plastic cover 261 are reinforced by a pair of straight vertical ribs 263 and 264 integral, at their inner end, with a cylindrical ring 270 conical to the end. 'axis 32a, and aligned radially with the axis 32a projecting on the bottom. The ribs 263 are directed towards the rear partition 35a and have vertical extensions forming uprights 265 integral with this partition. The ribs 264 are directed towards the partition 39a and are integral at their outer end with gentle vertical posts 266 at a certain distance from this partition.

   A vertical transverse rib 267 parallel to the rear part of the partition 39a is integral with the uprights 266 as best appears in FIG. 21. The radial ribs 263 and 264, the transverse rib 267 and the circular rib 270 form forps with the top 50a and terminate in a plane parallel to this partition 50a as seen in Fig. 22, from so as to limit the movement of the tape in the magazine towards the bulkhead 50a. The vertical components 265 and 266 are disposed at the same distance from the axis of the boss 32a and extend below the level of the lower edges of the ribs 263 and 264, terminating in a plane parallel to the partition 50a .

   If desired, one or more vertical reinforcing ribs 263 can be added substantially of the same size as these ribs and terminating in the same plane.



   You can go up to room 30 one. tape spool

  <Desc / Clms Page number 74>

 any suitable endless capable of rotating on the axis 32a. As can be seen in the drawing, a reel 20a is housed in the magazine A2, and this reel has a flat winding 29a of magnetic sound recording tape 17a wound in a spiral and mounted on the reel so as to be rotatable. around axis 32a. An annular bearing 23a of nylon or other suitable plastic material is mounted on the boss 32a between the top and the bottom of the magazine to allow rotation of the spool 20a.

   In the drawing, the reel is shown formed of two plastic parts rigidly joined to form a block. The spool comprises a horizontal circular disc or plate 271 and a coaxial frustoconical hub 272, similar to the plate 21 and the hub 22 of the spool 20. The plate 271 has an annular shape and has a cylindrical inner portion 269 mounted to rotate on it. the bearing 23a and a peripheral edge 273 concentric with the cylindrical portion 269.

   The inner diameter of portion 269 is substantially equal, although slightly greater than, the outer diameter of the vertical surface of bearing 23a in contact with the spool, so that the spool can rotate with minimum friction, and the outer diameter of this portion cylindrical is substantially equal to the internal diameter of the hub 272 which it supports, so that the hub can be rigidly fixed to the disc 271 by gluing or in a similar manner. The diameter of the surface 273 is only slightly less than the internal diameter of the rear part 35a of the cover 261, so that this surface extends below the lower edges of the posts 265, 266 and 268.

   As shown in the drawing, the lower edges come just above the peripheral edge 273 of the upper marginal surface.

  <Desc / Clms Page number 75>

 ricure of the disc 271, so that the uprights pocket the outer peripheral turn of the winding
29a to move away radially outward from this edge, the lower edges of the ribs 263 and 264 lying a very short distance above the flat upper surface of the winding 29a (at a distance substantially less than the width ribbon)

   so as to prevent any vertical movement of the tape on the outside of the winding between the inner peripheral coil and the outer peripheral spirc of this winding. The ribs and posts of the spool 20a prevent the tape winding from leaving the spool 20a during the unwinding of the tape, when the magazine A2 is removed from the recorder, tilted or twisted. and at any other time.



   The frustoconical outer surface of the hub 272 is concentric with the portion 269 of the disc 271 and is in contact with the inner peripheral turn of the winding 29a, so as to keep the winding in a concentric position with respect to the axis 32a and to guide the tape leaving the winding, As shown in the drawing shown, this frustoconical surface ends substantially at the top of the winding, since the hub 272 is shown with a height equal to the width of the tape 17 .. The tape is guided from the inner peripheral turn of the winding towards the front corner of the magazine, then through the cavity 38a, past the magnetic head 7a to the front corner 259,

   to return to the outer peripheral turn of the winding, as best seen on the Pig. 21.



  As shown in this figure, the reban 17a forms a loop of M bnus and is rotated 180 degrees on itself when

  <Desc / Clms Page number 76>

 passes through angle 259 to return to the outer peripheral turn of the winding. The Mobius loop allows prolonged operation as has been explained previously and can, if desired, be used in any of the removable magazines described.



   There may be provided a vertical guide 274 receiving the tape 17a when it passes from the inner peripheral turn to the front part 258. This guide, as seen in FIGS. 21 and 23 is arranged transversely with respect to the tape and has at its upper end a hook 275 for the passage of the tape of a width substantially equal to the width of the tape 17a.

   The bottom of the notch on which the tape bears is preferably flat and inclined at an angle of about 30 to 45 degrees to the horizontal, so as to guide the tape from the substantially horizontal position that it has as it passes. above the winding, in its vertical position at the front of the magazine, and it is preferably arranged above the plane of the upper surface of the winding so as to support the part of the tape between the guide 274 and the inner peripheral turn of the winding and to reduce its frictional contact with the top of the winding. The guide 274 is molded and is integral with the bottom 260; it protrudes upwards to a level corresponding substantially to that of the partition 39a, so as to meet the lower face of the top 50a, so that this top prevents the tape from coming out of the notch.



   There are two vertical uprights 276 aligned laterally molded with the vertical partition 39a and the bottom 260 of the store A2. These amounts are arranged in the front angles 258 and 259 of the store at the front ends of the partition 39,;: and extend between the bottom 260 and the top

  <Desc / Clms Page number 77>

 
50a, as seen in Figs. 17 and 18. The bottom 260 has an extra thickness behind the uprights 276 and is pierced with two laterally aligned circular holes 277. The studs 203 are engaged in these holes as seen in FIGS. 16 to 18 and maintain the magazine by preventing it from leaving its normal active position near housing 202.



  The upper parts of the uprights 276 are secured by a connecting element 278, rectilinear and transverse. This element is parallel to the straight part 40a of the cover 261 and is separated therefrom by a certain distance, so as to leave the tape in a narrow passage. and rectilinear 52a in the front part of the magazine above the housing 38a.



  This corridor 52a has the same role as the slot 52 of the store A; it receives a rectilinear part of the ribbon and completely covers this part of the ribbon. This corridor is relatively narrow cu which practically protects the magazine from unwanted contact and protects the tape from negligent handling.



   A suitable device is provided at the front of the magazine A2 to produce a relative movement between a part of the tape 17a and a part of the magazine, so as to expose a part of the tape in the housing 38a and to allow it to come into contact. with the magnetic head 7a, when the magazine is in its normal active position. As seen in the drawing, the parallel parts of the partitions 36a, 37a and 39a form rectangular passages where the tape engages, on each side of the housing 38, and the tape 17a is mounted on soft guides 41a so as to s 'raise and lower in these passages which corresponds approximately to the gap between the bottom 260 and the cover 50a of the magazine.



   Guides 41a can be mounted in magazine A2

  <Desc / Clms Page number 78>

 in any suitable manner so as to be able to move substantially vertically. As seen in the drawing, the uprights 276 are provided with vertical guide bores 279 aligned laterally and intended to slidably receive the guides 4-la. Each of the guides 41a has a cylindrical side surface the diameter of which is substantially equal to the diameter of the bores 279 and which fits in the bore so as to slide therein, and each guide has a forward portion 280 projecting towards the end. front, entering a narrow vertical guide slot made in the front edge of upright 276,

   and of a width only slightly exceeding that of the part 280. This slot extends over a length equal to the total height of the conjugate bore 279 so as to allow the guide 41a to move vertically between an upper position where it bears against the cover 50a as shown in FIG. 17, and a lower position where it rests against the bottom 260, as seen in FIG. 18. The lower parts of the tape guides 41a, housed in the bores 279, are hollowed out to receive helical compression springs 42a which bear against the bottom 260 and press the guides towards their upper position. The upper surfaces of the guides which bear against the cover 50a are shown flat for the cortect with the levers 208.

   Two narrow longitudinal slots 45a, of a width only slightly greater than that of the levers 208, are provided on either side of the magazine cover 261 and are aligned with the bore 279 so as to allow the levers 208 to move vertically to through the front part of the magazine, and similar slots 54a of a substantially identical laser are drilled in the housing 202 for an identical purpose. The portions of the lid 261 prmant

  <Desc / Clms Page number 79>

 edges of the slots 45a are in the drawing turned outwards thus constituting vertical ribs 281 at the front of the magazine, intended to come to rest against the housing
202 when the magazine is in its normal active position.



   The narrow protrusions 280 of the guides 41a are widened at their anterior end to form extensions 282 for retaining the tape and have smooth flat top surfaces extending to the posts 276 such that the bottom of the tape. tape 17a can slide over them and that the tape is supported there with a minimum of friction. The uprights 276 serve as fixed guides maintaining the lateral faces of the tape 17a in a vertical position in the front part of the magazine. The front and side surfaces of the liars 276 which contact the tape are slightly curved to reduce friction to a minimum, and are vertical to keep the tape in an upright position.

   As seen in the drawing, these amounts are provided with two small appendages or vertical beads 283, aligned laterally, arranged over the entire height of the amounts and intended to come into contact with the tape. The web contact surfaces of the posts 276 in front of these beads are cylindrical and centered at the bores 279 '. The beads 283 have cylindrical vertical contact surfaces of a smaller diameter, which are closer to the edges of the magazine than the contact surfaces of the posts 276.

   The cylindrical tape contact surfaces of the posts 276 and beads 283 contact the face of the tape as the tape is lifted into the passage 52a above the. housing 38a and when the tape is in its lower position, exposed in the housing, so as to hold the faces of the sensitive tape-

  <Desc / Clms Page number 80>

 vertically. When the tape is stretched between the uprights and the guides 41a are in their upper position as seen in Figs, 16 and 17, the rectilinear part of the tape stretched between the uprights is located practically in the middle of the corridor 52a and is all entire inside this corridor above the housing 38a.

   This rccti- line part is also a short distance in front of the part of the roller 86a which contacts the tape as well as the magnetic head, so that it can easily be lowered between the feed rollers. 86a and 87a and bring it into contact with the drive roller and the magnetic head. This drive roller and chain head preferably have their upper surface below the lower edge of the transverse parts of the magazine which form the walls of the corridor 52a, so as to facilitate the placing of the magazine in its active position, or its position. extraction.



   Los guides or supports 41a and the uprights 276 act very similarly to the guides 41 of the store A; they bring the tape 17a from an erased position in which the tape is entirely inside the magazine to an advanced position in which a substantial length of the tape is exposed in the space 38a in contact with the magnetic head and the feed rollers.

   Magazine A2 is quite analogous to magazines A and A 'and is of a type capable of being used on the same tape recorders as the latter magazines. It is obvious, for example, that a magazine constructed substantially like the magazine A2 on the tape recording and reproducing device 1, shown in Figs. 1 to 8, can be employed, and that a magazine can be used. store constructed similarly to store A or A 'on device 1a or 1b.

  <Desc / Clms Page number 81>

 



   The magazine A2 may include a notch 53a similar to the notch 53, in order to allow the drive of the disc.
271 of the reel 20a by a drive roller similar to the roller 105. If desired, the recorder 1a can be provided with such a drive roller, but the latter is not necessary for the usual lengths of. ribbon. If such a roller is provided, the U-shaped guide 206 can be omitted, the pins 203 in this case constituting sufficient means of securing the magazine in its active position.



   Magazine A2 can be lowered into the active position on the horizontal top of cover 20, by placing magazine holes 277 in coincidence with placement studs 203 and lowering the magazine engaged over the studs. This coincidence is facilitated by the presence of the guide 206 because this guide meets the partition 39a and places the magazine in a suitable position as best seen in Fig.16.



  The levers 208 do not interfere with the lowering of the magazine in the active position nor the withdrawal of this magazine out of this position, since these levers can be removed as indicated by the dot-dashed line in Fig. 17, so to be outside the store route. Once this magazine is placed in the normal active position, the knob 15a can be rotated ninety degrees in either direction from its neutral or "off" position as seen in Fig. .15 until one of the rollers 227 enters the notch 230.

   This rotational movement advances the levers above the guides 41a and lowers them in the castings 45 and 54a in the position of Fig. 18, the lower face of the levers coming into contact with the lc, the upper part of the back guides 41a and simultaneously lowering them to apply them

  <Desc / Clms Page number 82>

 against the bottom 260 of the store. The levers passing over the tape force it to slide on the front vertical surfaces of the uprights 276 from the high position it occupies in the corridor 52a to the low position of FIG. 18.

   Once the magnetic tape is lowered, the rollers 86a and 87a are brought into the tape feed position in contact with the opposite side faces of the tape, and the tape comes to rest against the face of the magnetic head 7a in view. recording or playing back a message on the tape. then the feed rollers are returned to an inactive position, out of contact with the tape, and button 15a is actuated to return bar 224 to its neutral position, as seen in Fig. 15. , such that the levers 208 are withdrawn from the path of the magazine, through the slots 54a.



  The magazine can then be removed by lifting it to release it from the studs 203 and replace it with another magazine.



   When a magazine is placed in the active position on the nipples 203 and you want to record a message on the tape, the knob 15a is rotated ninety degrees in one direction from its neutral position, so as to lower tighten the tape and put the machine in working order for recording. If it is desired to reproduce a recorded message rather than recording a message, the tape is lowered by turning the knob 15a ninety degrees in the opposite direction so as to put the magnetic head and the electronic equipment in the slot. state corresponding to the reproduction.



   It is obvious that a magazine constructed according to the invention and suitable for use in combination with the recording and reproducing mechanisms 1, la and 1b

  <Desc / Clms Page number 83>

 can have various shapes other than those described above, and the spool rotatably mounted in the magazine can be quite different from the spools previously described.



   In Figs. 28-31 is shown an alternative magazine or cartridge A3 arranged to fit on tape recorders 1a and 1b and of a type suitable for use on a tape recorder similar to recorder A. ct on various other tape recorders,
Magazine A3 has a shape substantially similar to that of magazine A or A2 ot has a substantially rectangular front part 285 and a rear rounded part.
286 in which can be mounted an endless reel of tape (for example, a reel similar to reels 20 and 20a or of the type described in the aforementioned patent application N 459,313).



   The magazine has a flat bottom 287 over its entire length and a vertical annular boss 32b constituting an axo integral with the bottom and projecting upwards.



  Mounted on this pin 326 above the bottom 287 is provided a one-piece cover 288 having a flat top surface 50b and a continuous rim 289 forming a side wall surrounding the edges of the bottom and in contact with them.



  The flange 289 has a semi-cylindrical rear part 356 concentric with the vertical axis 32b, parallel longitudinal vortical walls 36b and 37b and a transverse and vertical frentalc part 40b perpendicular to the longitudinal walls. The lower front part of the store is provided with a substantially rectangular housing 38b, limited by a vertical edge 39b integral with the bottom 287 and forming the front edge of this bottom. A pla-.

  <Desc / Clms Page number 84>

 that horizontal 290 is molded with the edge 39b above the housing 386.

   This plate is parallel above 50b of the cover 288 and is separated therefrom by a small distance, so as to form a rectilinear transverse passage 52b, above the housing 38b and in communication with it in order to receive the tape 17b as well as that seen in Fig. 29.



   The cover 288 comprises an annular part 291 in extra thickness, hollowed out in order to receive the upper part of the axis 32b, and it is placed in contact with the partition 39b and the axis, its upper part 50b being parallel to the bottom 287 ot its rim 289 being in contact with the edges of the bottom. The shaft 32b is internally threaded in order to receive a fixing screw 51b coaxial with the shaft 32b and with the annular part 291, and making it possible to fix the cover on the shaft in a removable manner. As with the magazine A2, the cover and the parts of the magazine A3 integral with the bottom can be economically molded from a suitable plastic material.



   The partitions 39b and 289 limit a large chamber 30b in the posterior prrtie 286 of the magazine intended to receive an annular reel of tape 20b carrying a flat winding 29b of endless magnetic tape 17b, mounted on the reel so as to be able to turn around it. a vertical axis.

   The parallel parts of the vertical partitions 36b, 37b and 39b define dcs rectangular passages 292 and 293 intended to receive the tape and located at the front corners of the store; a ribbon loop starts from the inner peripheral turn of the winding 29b towards the front, traversing the passage 293, up to a front corner of the magazine, then laterally crosses the space 38b to arrive at the other

  <Desc / Clms Page number 85>

 front corner of the magazine and return through passage 292 to the outer peripheral turn of the winding. As seen in the drawing,

   the part of the tape which comes back through the passage 292 towards the winding 29b has not been twisted and has vertical side faces, but it is obvious that the tape must have a twist of 180 degrees when 'it passes from the front of the store to the outer peripheral turn of the winding
29b when using a Mobius loop. Like partitions 39 and 39a of magazines A and A2, partition 39b is spaced from the front partition of the magazine to allow the tape to move sideways from one corner of the magazine to another.

   vertically elongated openings 284 being formed between the partitions 39b and 40b in which the tape engages and which allow it to move vertically as it enters and exits the space 38b.



   The portions of the tape which pass through the openings 284 between the front passages 292 and 293 are supported by two independent tape guides aligned and movable vertically, of similar shape, and the tape is arranged to be moved by the guides between a low position. in which it is exposed in space 38b as seen in Figs. 30 and 31, and a high position in which it is housed in the corridor 52b and is entirely inside the store, as seen in Figs. 28 and 29.

   The guides 41b are mounted so as to oscillate vortically about a horizontal axis on two laterally aligned screws or oscillating axes 294 engaged in laterally aligned and threaded holes in the partition 39b near its front ends. Each tape guide is biased towards its upper position as in Fig. 29

  <Desc / Clms Page number 86>

 by means of a helical tension spring 42b, one end of this spring being fixed to the guide and the other end to the partition 39b, so as to oppose an elastic resistance to the oscillation of the guide from said high position at said low position.

   Each guide 41b comprises a smooth guide slot 295 formed at its front end, intended to receive and guide the tape 17b, and having a width substantially equal to that of the tape so as to be in contact with the opposite edges of the tape when 'it passes through the slits, the edge of the slits being slightly curved to bear against the face of the tape over its entire width. The curved edge of slot 295 is vertical when the guide is in the down position as seen in Fig. 31, so as to keep the side faces of the tape vertical, and is almost horizontal when the guide is in the up position as on Fig. 29 so as to support the tape horizontally in the corridor 52b above the space 38b.

   The anterior corners of the guides 41b los closer to sides 36b and 37b are provided with smooth retaining lips 296 intended to prevent the tape from accidentally exiting the slits 295, the lips of each slit being formed on each edge of the slit and directed l 'towards each other and constituting a constriction of an opening not exceeding, preferably, substantially half the width of the tape, as seen in Fig. 31. The slots 295 are separated from the axes 294 by a distance corresponding substantially to that which separates these axes from the lower part of the passage 52b, so that a substantially rectilinear portion of the strip 17b, stretched between the guides 41b, can oscillate around the axes 294 and pass from the space 38b into the transverse corridor 52b.

   The

  <Desc / Clms Page number 87>

 front edges of guides 41b are closer to the axes
294 than the cover 50b and the front partition 40b, so that the guides are free to oscillate between their high and low positions as indicated above.



   The guides 41b can oscillate vertically on their axes 294 simultaneously, so as to lower the tape, once the magazine A3 is brought into the active position on a tape recording or reproducing device, or before that time. These guides can lower the ribbon, in response to the rotation of a control knob, or in response to movement of the magazine brought into its active position.



  As can be seen in the drawing, the guides 41b are actuated simultaneously by vertical studs aligned laterally 203a. The bottom 287 is pierced with soft circular holes aligned laterally 297, of a diameter substantially equal to that of the studs so as to allow the latter to engage therein by sliding when the magazine is in its active position, and the rear parts of the guides 41b have a shape having slightly incised camouflage surfaces 298 intended to cooperate with the upper end of the studs 203a. cc which causes the vertical oscillating movement of the guides.

   When the cam surface 298 sc is in relation to the stud 203a in the position shown in Fig. 31, the tape is fully lowered; ot when the cotto sur- face is not in contact with the nipple, the ribbon is outside the space 38b and is entirely inside the magazine as seen on the Pig. 29.



   In Figs. 30 and 31 there is shown a part of a tape recording and reproducing device 1c provided with a horizontal plate 5b similar to the plate 5 of the tape.

  <Desc / Clms Page number 88>

 recording device A and intended to support a tape magazine.

   The device lc comprises a magnetic transmission head 7b, a roller driven by a motor or feed roller 86b, and a freely rotating rubber-covered idler 87b, forming a vertical projection at a small distance above the plate 5b. , so as to come into contact with the tape of the magazine A3 when the latter is in its lower position as in Fig.3l. These elements can be identical to elements 7, 86 and 87, respectively, of the recorder 1 and can operate in the same way. If desired, a drive roller for the coil 105, corresponding to the roller 105, can be provided. do the recorder 1, in order to drive the reel disposed in the chamber 30b,

   in which case one can provide a notch 53b formed in the bottom 287 and the vertical partition 39b to allow the roller 105b to come into contact or out of contact with the coil; but such a drive roller is not necessary and is generally omitted when ordinary lengths of tape are used.



   Like magazines A, A 'and A2, the bottom of the front part of magazine A3 is open towards the front of the rectangular housing in which the magnetic head is placed so as to allow the feed rollers to come into the feeding position tape in contact with the opposite side faces of the tape, a rectangular opening 299 being formed in the partition 40b for this purpose.

   This opening may have a width just sufficient to allow the free roller 87b to come against the drive roller 86b if the magazine is lowered vertically in its active position, but it preferably has a length corresponding to that of the housing 38b and a height slightly more. big than

  <Desc / Clms Page number 89>

   that of the magnetic beast 7b and of the roller 86b here,) so as not to hinder the horizontal movement of the magazine when it is brought into an active position and when it is withdrawn.



   The 41b guides tilt when their cam surface
298 meets the nipples 203a, as a result of the vertical rotational movement of the bottom of the magazine 287 with respect to the -tons.



     Co-rotating movement can be achieved by elevating the studs 209a through the holes 297 from a position below the top surface of the plate 5b, by means of a retative control knob or other or- movable control shaft, once the magazine A3 is in its normal position of operation as seen in Figs. 30 and 31, or Station,

     the studs 203a being in a fixed position on the plate 5b by lowering the magazine A3 while ensuring the coincidence of the holes with the studs 203a in which case the latter perform the same function as the studs 203, preventing the magazine from moving horizontally on the platform 5b outside the normal operating position, the magazine then having to be brought vertically into its normal position.



   The magnetic read head 7b and the roller 86b do not interfere with the vertical tilting movement of the straight portion of the tape stretched laterally between the slots 295 of the tape guides, and are arranged so as to. be adjacent to the posterior vertical face of the tape when the latter is in its lower position; in the enlargement 38b.



  The curved edges of the slots 295 on which the back side face of the tape rests are vertical and substantially laterally aligned with the anterior vertical surfaces of the drive roll and magnetic head when the tape is lowered as seen in FIG. ,30,

  <Desc / Clms Page number 90>

 so that one can easily lower the tape between the rollers 86b and 87b to bring it substantially into the active position in contact with the magnetic head. Once the tape has been lowered, the rollers can be brought into the feed position in contact with the other vertical face of the tape and the tape can be applied against the magnetic head for recording or reproduction.



   Figs. 28-32 showing one embodiment of an endless tape reel 20b according to the invention capable of performing satisfactorily when turned over, this reel being shown, for convenience, mounted in magazine A3 although it could obviously be mounted in magazine A or A2, or in various other magazines or fitted on an axis which is not combined with a magazine. The bobbin 20b is of particularly advantageous use on a tape recording and / or sound reproduction device intended to be mounted on an airplane or any other vehicle on board which the spool may sometimes be overturned or turned upside down. as long as it is used.



   Like the reels of ribbon 20 and 20a previously described, the reel 20b comprises a round hub flared axially and in contact with the ribbon, and a plate or disc carrying the winding arranged at the end of the hub with a smaller diameter and arranged in so as to rotate with the hub, so that the coil 20b operates like the coils previously described when it is placed in its normal active position, with its axis vertical.

   However, unlike the coils previously described, coil 20b comprises a second plate or disc disposed on the larger diameter end of the hub, arranged to rotate.

  <Desc / Clms Page number 91>

 with this hub and supporting 11 windings when turned upside down When the spool is operated in the inverted position with the vertical axis, it works in a very similar way to spools 20 and 20a, with the difference that the tape coming from of the inner peripheral spiro of the winding exits through the end of the larger diameter of the conical hub and passes under the winding towards the front corner of the magazine.

   In this case, there may be substantial friction between the tape coming from the inner peripheral turn and the bottom of the tape winding.



   In order to reduce the friction, it is generally preferable to employ on the reel 20b a tape having at least one side coated with a magnetic coating and to cover one side or the soft sides of the tape with a thin film. uniform and continuous colloidal graphite deposited from a dispersion in a liquid.



     In accordance with the process according to the invention, very finely divided graphite particles suspended in a liquid carrier are applied by brushing, spraying or in any other suitable manner on one or the other side or on both sides. a tape coated with a magnetic coating, these particles adhering to the tape when the liquid evaporates. Preferably, the graphite is in the form of very fine lamellar particles or flakes of colloidal size, and the liquid support preferably contains a significant amount of a liquefied gas or of a very volatile liquid such as Freon, Fluron, isopropyl alcohol, carbon tetrachloride,

     etc .. * thus capable of easily evaporating. The volatile liquid may consist of gasoline, but should preferably be of a

  <Desc / Clms Page number 92>

 not easily flammable type.



     According to the invention, the tape as well as the surfaces of the reel which support the tape are coated with graphite particles of colloidal size deposited from a liquid. It is obvious that. The term "colloidal" used here designates fine particles of the order of a few microns, which are small enough to be able under normal conditions to remain dispersed and suspended in a liquid such as water, gasoline, etc ... for extended periods of time without rushing. These particles normally have dimensions not substantially exceeding 10 microns. Particles that are greater than 20 microns (0.020 millimeters) in diameter are markedly non-colloidal and precipitate rapidly from solution.



   Non-colloidal particles of graphite will not provide a satisfactory coating for magnetic tapes and ordinarily a good coating cannot be obtained by using graphite having average particle sizes exceeding about ten microns. In general; the results are better as the size of the particles applied to the tape decreases. in accordance with the invention; preferably at least about ninety percent of the particles applied to the tape have a size of not more than about ten microns and the average size of the particles is preferably not more than about five microns.

   The results are all the better if the percentage of large particles is lower, because the large particles do not adhere strongly to the tape, and generally good results can be obtained if no graphite particle has a larger diameter. at 10 microns Best results are obtained when all the

  <Desc / Clms Page number 93>

 graphite has particle sizes less than five microns, but sometimes it is desirable to use. less expensive graphite containing small quantities (e.g.
 EMI93.1
 example up to five or ten percent) of graphite pr3scn.ta .W a larger particle size.

   Superior results can be obtained when the graphite applied to the tape has medium-sized particles not exceeding about soft microns, with at least ninety percent.
 EMI93.2
 one hundred doe pQrt1lOS having a dimension not exceeding about five miorons. and the best results can be obtained if all the particles have a maximum diameter of not more than about five microns.



   The graphite particles can be sieved to obtain particles of convolvable size. An almost ideal graphite film can be applied to the tape by spraying the tape with a solution containing back by
 EMI93.3
 Graphite tipules with an average diameter of less than two microns. After proper sieving, it was possible to obtain a fine extr8momont graphite containing about ego at 95 per 4 years, of particles of a diuonsion not exceeding 1-1 / 2 microns, the size of the particles not exceeding about three microns.

   The fine oxidative graphite of this letter, deposited on the tape from a solution, adheres very strongly to the tape and provides an ideal coating for the tape, which it. either placed on one side of the ribbon covered with a magnetic coucho or on a non-rocouvcrto side,
The tape is coated by the coating process de-
 EMI93.4
 written oi-desgua, over its entire width and length, with oi-4r oxide or other suitable magnetic product, and the ragnl4tiqnù layer is scraped over all the surface.

   width ot

  <Desc / Clms Page number 94>

 its length, of a thin, uniform, continuous film of colloidal graphite particles which adhere strongly to the tape, this film exhibiting a coating structure characteristic of flake materials deposited from a dispersion in a liquid . Both side faces of the tape can have such a graphite film, and both can be coated with a magnetic oxide layer.



   It is often advantageous to use in reel 20b a double oxide magnetic tape, to increase the length of the message recorded on the tape, or to reduce the length of tape required to receive a given number of messages. The double-layered oxide tape enables the useful use of the Mobius loop, for example, which doubles the usage time of a given length of tape. The reduction in tape length made possible
Bible by the Mobius loop and the magnetic covers on both sides of the tape significantly reduce the tensile force due to friction.



   Figs. 33 and 34 show the tape 17b on an enlarged scale. This tape has a flexible base or tape holder 312 of "Uylar" cellulose acetate (tera, polyethylene phthalate oriented by stretching in two substantially perpendicular directions, having a molecular weight high enough to present a diffraction image with rays. X characteristic (of a crystalline state when stretched in this manner), or other suitable non-magnetic plastic material.

   The support 312 has a uniform thickness over its entire length and is rotated on each side, in a conventional manner of finely divided pieces of iron distributed in a binder

  <Desc / Clms Page number 95>

 suitable for forming thin layers 313 on both sides of the tape and over the entire width and length of each of these side faces.



   Magnetic oxide layers 313 are fully covered with uniform and continuous thin films 314
 EMI95.1
 very wheat divided graphite) or coï graphite, '. da.J adhering to the tape. Each of the films 314 reduces the coefficient of friction of the tape 17b and makes this tape electrically conductive over its entire length, thus preventing the fora; ion of static charges between the turns of the tape, liable to generate an attraction between adjacent turns and cause tape to stick. The conductive films of graphite continuously disposed on each side of the tape allow the use of endless tapes in the spool 20b which could not be used if they were coated on one side only.

   The tapes with a solid oxide layer which cannot be satisfactory with the coil 20b when
 EMI95.2
 have only one side coated with graphite 0011.o "c7., ¯. 6.9 wcx ï, .nt suitable for use in this coil when they are coated on each side with colloidal graphite forming a uniform and continuous film of which the structure is of the overlapping type.



   A nylon bearing similar to the bearings 23 and 23a of the coils 20 and 20a can be mounted on the axis 32b. 0 ros-
 EMI95.3
 peoti vement, so as to'S.cimer.ala reel 24b an anti - friction support, or else a ball bearing can be mounted between the axis and the reel for this purpose; however, these bearings are not necessary since the coil 20b can operate satisfactorily when the axis itself.

  <Desc / Clms Page number 96>

 even has a shape designed to form a bearing for the coil.



  As can be seen in the drawing, the axis 32b has a smooth outer bearing surface on which the spool 20b rests, which ensures that the spool is mounted in a concentric position with respect to the axis 32b so as to allow movement. of rotation around an axis perpendicular to the bottom 287.



   The coil 20b is shown in the drawing provided with a frustoconical molded plastic hub 300 whose diameter increases as one approaches the cover 50b, and a flat disc or circular molded plastic plate 301, rigidly fixed to the hub 300 and provided with a cylindrical inner part 302 projecting upwards and coaxial with this hub. The disc 301 has a smooth flat surface 303 in contact with the tape and lying in a plane perpendicular to the axis of the hub 300, and the portion 302 has an internally smooth bearing surface in contact with the bearing surface of the hub. axis 32b so as to maintain the surface 303 parallel to the bottom 287.

   The axial length of the inner cylindrical part 302 may be slightly less than the distance between the surface of the axis 32b which supports the spool and the lower flat surface of the plastic cover 291, so as to leave a small clearance between the fixed parts of the magazine and the coil ch rotation while substantially preventing any axial movement of the coil in one direction or the other.

   The cylindrical bearing surface of the axle 32b in contact with the inner cylindrical surface of the disc 301 has an axial length greater than this clearance so that the spool no can tilt into a position coaxial with the axle 32b even when the coil is returned. When the spool is returned, the

  <Desc / Clms Page number 97>

   surface of the flat end of the cover 291 contacts the outer axial end of the portion 302 and provides an anti-friction bearing surface on which the spool can rotate.



   Rigidly connected to the large diameter end or upper end of the hub 300 is provided an annular molded plastic plate or disc 304 shown in the drawing with a circular shape and a diameter equal to that of the disc 301 already mentioned. The second disc 304 has a smooth flat surface 305 in contact with the tape, disposed in a plane parallel to the surface 303 of the first disc 301 and separated from this surface by a distance greater than the width of the tape 17b and the height. axial do the winding 29b supported on the coil between these surfaces.



  The hub 300 has a smooth troconical outer surface 306 which contacts the inner peripheral turn of the coil 29b and extends substantially from the surface 303 to the surface 305. The distance between the surfaces 303 and 305 of the coil 20b which are in contact with the winding is substantially less than twice the width of the tape, so as to prevent the tape from tangling and should be sufficient to allow the tape to move easily between the winding 29b and the surface of the tape. disc 305.

   This distance may be greater than the width of the tape, or the axial height of the winding, by a very small value (for example about five to two times the thickness of the tape) depending on the width and thickness. of the tape employed, and usually less than about 2.5 millimeters, so that the winding does not move axially a substantial distance on the spool when the spool is inverted.



   Top disc 304 can be glued or attached

  <Desc / Clms Page number 98>

 rigidly in another way to the spool after mounting the winding 29b on the hub 300. If desired, an opening can be provided in the disc 304 or provide a removable attachment between the hub and the disc to allow access to the coil but generally this access is not necessary once the coil 29b is
 EMI98.1
 wmounted comfortably, on the hub.



   As can be seen in the drawing, the ribbon coming from} 1,:. inner peripheral turn of the winding 29b passes between the upper part of the winding and the surface 305 to arrive at the guide 41b arranged at the front of the magazine without encountering any auxiliary fixed guides, but it is obvious that one can provide if desired, a fixed guide similar to guide 274 or any other suitable guide.



   The top and bottom edges of the tape 17b are shown with equal length and are at a constant distance from each other along the entire length of the. tape which makes it possible to wind the major part of the tape with its vertical lateral faces so as to form a flat winding 29b whose turns are in contact with one another. Special tapes forming a frustoconical winding can also be mounted on the spool 20b, but these tapes are more expensive to manufacture, more difficult to handle and require special magazines to receive the tape. Preference is given to ordinary tape such as tape 17b which allows movement of the tape in a horizontal plane from the magnetic head to the outer pesipherical turn of the winding.



   Preferably, the hub of the coil 20b is frustoconical as seen in the drawing, but it is obvious

  <Desc / Clms Page number 99>

 that it is also possible to use various other hubs capable of keeping the winding 29b concentric with respect to the discs 301 and 304 and of allowing the rotation of the spool by friction contact with the tape, for example as described in the application for aforementioned patent? 459,313. The hub must maintain the inner turns of the endless tape in frictional contact, and in a position coaxial with the spool; it must produce sufficient friction between the winding and the spool to rotate the spool at an angular speed at least substantially equal to that of the outer peripheral turn, whether the spool is straight or upside down.



   The. drive roller 86b and spring loaded idler 87b can be moved in contact with tape 17b so as to apply tension to the tape to extract it from spool 20b, drive roller 86b rotates around a fixed vertical axis and is driven at a predetermined constant speed by an electric motor or other suitable drive device.



   The tension applied to the tape by the feed rollers exerts a tensile force on the tape originating from the internal peripheral turn of the winding and causes it to pass over the face of the magnetic head 7b at a substantially constant speed. . When the endless tape is not of excessive width or length, the wire drive 105b is not necessary, and excellent results can be obtained by relying only on the friction produced between the belt. tape and spool to rotate the spool disc carrying the winding.

   When there is on the reel 20b a small winding of tape% for example a: tape six millimeters in width and of a length

  <Desc / Clms Page number 100>

 less than or equal to sixty meters) there is little variation in the tension exerted on the tape as a result of the friction between the turns, and the tape feed is relatively uniform with a minimum of "jerk" or distortion.



   With tapes of ordinary dimensions, spool 20b operates efficiently in the upright or inverted position without the aid of roller 105b. The feed rollers pull the tape at a predetermined constant linear speed, preferably between 4.75 and 38 centimeters per second, so that the inner turns of the tape have an angular speed greater than that of the hub 300 'and of the discs 301 and 304, the sliding friction produced between this hub and the ribbon and between the winding and one of the discs causes the rotation of the reel at an angular speed greater than that of the outer peripheral coil, When the coil is normally straight,

   As shown in Fig. 29, the friction produced between the turns of tape and the spool rotates the spool and the rotating surface 303 is in contact with the lower edges of the winding, reducing the friction between the worst ones. the spool is turned over, the friction causes the spool to rotate in the same way and the rotating surface 305 is in contact with the edges of the turns of the winding thus reducing the friction between the turns, but the weight of the winding is applied down against the tape which passes between the winder and the surface 305 from the central coil.

   The friction produced by the contact of winding 29b and surface 305 with the tape exiting the winding reduces to some extent the efficiency of the spool when the spool is operated inverted but not interposed.

  <Desc / Clms Page number 101>

 does not mean the use of sufficiently long lengths of tape in the spool even under these operating conditions.



   When larger tapes are employed, it is preferable to provide a separate drive means for rotating the spool so as to minimize the friction produced between the coils of the winding and to prevent variations. of the drive torque requested from the motor driving the feed roller, so as to maintain a uniform speed of the ribbon passing through the magnetic head, 7b. When the length of the endless tape 17b exceeds about 90 meters, and particularly where its length is 180 meters or more, the drive roller 105b can be employed to reduce the friction existing between the turns in contact with the coil. winding 29b.

   The braid 105b is synchronized with or coupled to the drive roller 86b so that a low and substantially uniform tension is maintained on the tape as it exits the central turn of the winding 29b.



  This spool drive roller can be brought into contact with the circular edge of disc 301 as shown in phantom in Figs. 28 and 29 when idle roller 87b is brought against roller 86b.



   In order to minimize the friction existing between the turns of the tape as the tape passes through the winding of the peripheral turn outward to the central turn, the speed of the roller 86b relative to the roller 105b is predetermined, as such. that at least one and preferably several turns of the winding have an angular speed slightly greater than that of the discs 301 and 304. Preferably less than half of the spirns of

  <Desc / Clms Page number 102>

   the winding have an angular speed greater than cello of these discs.



   The best results are generally obtained when the peripheral speed of the disc 301 is kept constant by contact with the roller 105b and the scab: 86b has a peripheral speed 1 to 10 percent greater than the average peripheral speed of the part of the disc. which lies below the inner peripheral coil of the tape winding so that the angular velocity of the coil is about 1 to 10 percent greater than that of the discs 301 and 304.



   With 10a longer ribbons, adjusting the angular speed of spool 20b so that there is no more than about 10 to 10 of differential speed, "twitching" is eliminated. Coating the tape uniformly with colloidal graphite also reduces the head and distortion due to varying the linear speed of the tape at the magnetic head.



   In accordance with the invention, the horizontal surfaces which carry the tape winding of each of the coils described above and which lie between the hub and the peripheral edges of the coil are coated with colloidal graphite as described above in connection with the invention. of the tape coating, the liquid carrier containing the colloidal graphite being applied by brushing, spraying, or other suitable manner, to the surface of the reel.

   When the volatile liquid carrier (Freon, isopropyl alcohol, etc.) is evaporated, a thin, uniform and continuous film of electrically conductive graphite remains, which strongly adheres to the surface of the coil.

  <Desc / Clms Page number 103>

 contact with the tape, and completely covers this surface up to its outer edge.

   This film has a structure to be recovered characteristic of a deposit of flake material from a liquid, and it is conductive of static electricity so that it prevents the formation of static charges between the turns of the ribbon winding. The colloidal graphite particles employed for the coating of the coil are preferably of the same size and shape as those employed for coating the faces of the tape, and they adhere without a binder to the smooth surfaces of metal and steel. plastic material of the coil.



   When the platters or discs 301 and 304 of the spool 20b are of metal, the surfaces 303 and 305 are preferably very carefully polished from the hub to the outer edges of the discs. When these discs are molded from plastic, however, it is possible to obtain an extremely smooth and shiny surface during the molding operation without polishing. In accordance with the method according to the invention, the surfaces 303 and 305 between the hub 300 and the outer edges of the discs 301 and 304 are coated with a thin, uniform and continuous film of colloidal graphite intended to lubricate the tape and prevent formation. of static charges between the turns.

   This film can be applied to a polio metal surface or to a smooth plastic surface and adheres without binder to the surface. However, the volatile liquid carrier sprayed onto the surface is preferably of a type which does not react with the material which forms the surface or dissolve it.

  <Desc / Clms Page number 104>

 



   We see from the Pig. 32 how the 20b reel and the endless ribbon the it? which is mounted on the spool can be stored when the spool is not in use. In accordance with the invention, there is provided a continuous expandable plastic ring or collar 307 intended to be mounted on the peripheral edges of the discs 301 and 304 in order to maintain the winding 29b on the reel 29b, to prevent The outer turns of the winding come out of the spool when the latter is not in use and is withdrawn from the magazine.

   This expandable collar may have several inwardly projecting portions spaced along its periphery between the edges of the discs 301 and 304, in order to limit the radial outward movement of the outer turn of the tape and it may have of the parts arranged between the edges of the discs to pocket the movement of the tape radially outward beyond these edges.



   As seen in the drawing, collar 307 is in the form of a continuous strip of plastics material of radial thickness and substantially uniform axial height, molded to have a substantially cylindrical shape between its ends. opposites. The collar is provided at its periphery with two grooves 308 and 309 for receiving the edge of the discs 301 and 304 respectively, and may be provided with parts spaced on its periphery or projecting radially inwardly between the discs to limit the radial movement of the tape.

   As seen in the drawing, the collar 307 is provided with inwardly projecting tabs 310 and 311 disposed at opposite ends of the collar and which penetrate internally between the discs 301 and 304.

  <Desc / Clms Page number 105>

 so as to retain the tape against outward movement and to supplement the action of the grooves 308, in order to hold the collar on these discs. The tabs can be quite close to one another or else separated by a significant distance less than the outer diameter of the coil. These tabs are of such size and shape that collar 307 cannot be removed from the spool without substantial expansion of the collar.

   Figure 32 indicates in solid lines how the elastic collar 307 can be redially expanded when placed on or removed from spool 20b, and shows in mixed line the position of. collar mounted on the spool. As seen on the
Fig. 32, the grooves 208 and 309 have a uniform depth and a uniform width substantially equal to the thickness of the edges of the discs 301 and 304 so as to receive these edges and to be in contact with the periphery of these discs substantially over the entire length gorges.

   These grooves are normally circular and receive most of the periphery of the discs 301 and 304, the parts of the collar 307 located on the grooves being shown in the drawing without perforations and bonding radially inward between the surfaces. plates 303 and 305 of the discs, substantially around the entire periphery of the spool, so as to maintain the winding 29b of the spool. Before collar 307 is mounted on the. reels 20b, the endless tape 17b can be wound on the reel do so as to minimize the size of the loop compressed between the inner and outer peripheral turns of the winding 29b.

   The collar can be mounted with its tongues 310 and 311 spaced around the periphery of the spool at a certain distance from the loop so that the tape cannot exit through the opening formed between the tongues,

  <Desc / Clms Page number 106>

 outside the coil. The friction between the collar 307. and spool 20b effectively opposes accidental rotation of the tabs on the spool toward the loop of tape, and the inner ends of the tabs effectively oppose movement of the tape between the tongues.

   The collar, which forms a single piece of plastic material, is simple, inexpensive and easy to mount on the reels; it is capable of retaining endless tape very effectively in spool 20b even when the tape is short and winding 29b has an outside diameter substantially less than that of the spool. As the distance between the surfaces 303 and 305 of the spool may be only slightly greater than the width of the tape, it is almost impossible for the tape to get tangled in the spool 20b during storage or shipment of the tape. coil, once collar 307 is mounted on the coil.



   Of course, the invention is not limited to the embodiments shown and described which have been cited only by way of example.

** ATTENTION ** end of DESC field can contain start of CLMS **.


    

Claims (1)

CLAIMS 1. - Tape feed mechanism for magnetic recording and sound reproduction apparatus, charac- terized in that it comprises: a magnetic head, a removable magazine in which is mounted an endless tape capable of being set in motion, back means for keeping the magazine in a fixed position relative to the head, means for bringing the tape into a position of contact with the head and for making the tape run at a constant speed in front of the magnetic head , a control unit, nuclei sensitive to movement in one direction of this organ to trigger the drive of the tape in front of the ma- <Desc / Clms Page number 107> genetics, and back means sensitive to the movement of the control organ in the other direction to stop this drive and to cause the ejection of the magazine out of said fixed position. 2. - Mechanism according to claim 1, characterized in that the magnetic head has a slightly convex and smooth surface intended to receive the contact of the tape. 3. - Mechanism according to claim 1, charac- SI 0 in that the tape forms a spiral winding rotatably mounted on a reel, and means are provided for guiding the tape from the inner peripheral turn of the winding to the outer turn, these means comprising a device for guide moves up a certain distance from the reel so that it can be lifted and lowered in the magazine and adapted to bring the tape from an erased position. in which the tape is completely inside the magazine in an active position for which a certain length of tape is exposed, in a housing provided in the front part of the magazine. 4. - Mechanism according to claim 3, characterized in that the tape reel is mounted 60 in the posterior part of the store, and the guide device comprises soft guide members mounted in the anterior part of the store, separated from the one from the other by a certain distance and supporting a certain length of tape whose side faces are in a vertical position. 5. - Mechanism according to claim 4, characterized in that said guide members are constituted by two sockets slidably mounted on vertical pins solidary of the store and subjected to the action of springs which <Desc / Clms Page number 108> EMI108.1 press them upwards, that is to say towards the retracted position of the tape, said bushings comprising a groove intended to receive the tape. EMI108.2 6. - Mechanism according to claim 4, characterized in that between les.organes do guide and above said housing is provided a recctiligno passage adapted to serve for the passage of the tape when the guide members are in their high position and to allow lowering the ribbon to the active exposure position, inside the housing. EMI108.3 7. - Mechanism according to claim 3p characterized in that the reel comprises a rotating plate -ontc Dean of a vertical axis integral with the store, the endless tape onroulomont resting on this plate, a noyou tron- EMI108.4 conical on which said plate is fixed, coaxialoaaent, at its smallest diameter, and an upper flange coaxial to the nucleus, to which it is integral, has parallel to the plate, at a certain distance from the latter. 8. - Mechanism according to claim 4, characterized in that the store being carried by a support of the ap- EMI108.5 same of onrcgistrc ---- have or reproduction there is provided a device for lowering the tape guide members of the magazine which comprises a lever in forwe 'L arranged to come into contact with the guiè organs.D.0 and on the support so as to oscillate around an axis hcri ::; o: at <: tl, and a C:; 1. :: l0 soi; 1s-c to the `` '' .0 + ion of l 'cc ¯.rc? e ut adapted to cooperate with 1 support and with the lower prt7ç of the lever, dc runièrc to be made :; switch the. los gaidago organs lowering the ribbon by following the tilting of the lever. <Desc / Clms Page number 109> EMI109.1 9. - Mocanisne according to claim read caract6ri- .se in that the Deans provided to maintain the nagasin in a fixed position relative to the toto oagnotique consist essontiellcnont by a lock capable of engaging in a slot of the store so as to do not kjperrmenttre the extract EMI109.2 tion of '= gasin that when the ribbon is in the erased position above the magnetic head * 10. - Mechanism according to claim 4; characterized in that the store being subjected to the elastic action of an ejector device, it is provided -The device is- EMI109.3 Possible to the new commando member releasing the magazine lock when the tape guide members are in their raised position, which causes the ejection of the magazine by said device. He. - Mechanism according to claims 8 and 10, EMI109.4 characterized in that, the 6joctour device of the magazine is constituted by a rod mounted on the support of the apparatus, and biased towards the rear by a spring which thus tends to eject the magazine towards the rear when the lock is removed . 12. - Mechanism according to claim 2, character- EMI109.5 so that it is provided soft alignment members of the rub? n, located near the tctc, r.cstinvs to pull the tape to the fairo pass over the smooth surface of the têto, and soft guide fingers placed at proximity to the oxtréitÓ8 oppos6as of this surf :: tCo and provided with low curvature gorg-io adapted to receive the tape, a device allowing anenor Slli'c2lG. ": These guide fingers towards the head and. in C7.ozgn; rj means sensitive to displacement. " cia these oicu> tej do gui: '. ago to bring one of the o.rgt closer or apart: supply of the other, the arrangement being such <Desc / Clms Page number 110> that when said guide fingers are moved towards the head the portion of tape included ::. between the vertically movable guide members is driven by the feed members and arranged in an exactly determined position in contact with the smooth surface of the head, and is released when the guide fingers are moved away from the head. 13. - Mechanism according to claim 12, characterized in that said device provided fear moving the guide fingers and 1'imertation movable member relative to each other comprises a carriage, on which are rigidly fixed the guide fingers, capable of being approached or away from the head and cooperating with a cam, subjected to the action of the control member, which tends to move it towards the head against the action of a spring, this trolley itself comprising a plate, on which said movable feed member is rotatably mounted, and capable of moving on the trolley by moving towards or away from the other feed member, a spring acting on the plate to move it towards the other feed member while the cam acts to simultaneously drive the carriage and the feed member in the direction of the head and the other feed member . 14.- Mechanism according to claim 12, characterized in that the feed oragnes are back rollers arranged vertically. 15.- Mechanism according to claims 7 and 12, characterized in that the feed members exert a tension on the tape which comes out of the;} worst internal peripheral of the reel and entrains the tape out of the on- <Desc / Clms Page number 111> rolling at a speed such that the inner peripheral coil has an angular speed greater than that of the chainring. spool which supports the winding and where the sliding friction exerted between the hub of the spool and the tape constitutes the only means of driving the plate. 16. - Mechanism according to claim 12, characterized in that it ost provided elements for guiding the magazine to place it in a predetermined position in which the tape can be lowered between the feed members, a stop device to prevent the feed members from coming into the feeding position before the magazine is in the predetermined position, ot a device sensitive to the movement of the magazine to its position predetermined, intended to make the shutdown device inactive, so as to jpermottre the feeding of the tape once the tape has been lowered between the feed members. 17. - Mechanism according to claims 3 and 12, characterized in that the magnetic head, the feed members - mentation and the guide fingers are received in the logomont located in the anterior parts of the store, with a view to being brought into contact with the tape stretched between the guide members of the store when these bodies are lowered. 18. - Mechanism according to claims 14 ot 16, characterized in that the device for lowering the tape between the feed rollers and between the guide fingers and the toto is arranged so as to act before the fingers and the rollers do come one feeding position in contact with the ribbon, and to raise the ribbon when these fingers. ot rollers are brought out of their feeding position. <Desc / Clms Page number 112> 19.- Mechanism according to claims 10 and 16, characterized in that the control member is uno lever allowing to start the road and stop the feeding of the tape and there is provided a sensitive device to cover the ejector to prevent the movement of the actuator? when the magazine is moved away from its active position kprédeterminéc, and permitting the movement of this organ when the magazine is brought into this position, against the action of the ejector. 20. - Mechanism according to claims 11 and 15, characterized in that the commando member is integral with a vertical shaft, journaling on the supporta on which is fixed a stop with which cooperates a pawl mounted oscillating on the support so to be able to engage on the path of rotation of the stopper and move away from it, this pawl being in contact with the front end of the rod and moved by the rod from a position where the pawl prevents the rotation of the control shaft to a position where this pawl allows the rotation of this shaft, when the magazine is brought forward into the active position against the rear end of the ejector rod. 21. - Mechanism according to claims 8 and 16, characterized in that there is provided a coil drive member, preferably a drive roller, mounted so as to move on the support, and means for bring the spool drive roller automatically into the active position when the feed members are brought into the feed position, the magazine being arranged so as to pass over the drive roller by sliding on the support to come in predetermined position <Desc / Clms Page number 113> the coil mounted in the magazine being adapted to come into contact with the periphery of the drag roller when the magazine is in said position. 22. - Mechanism according to claim 21, characterized in that there is provided a motor adapted to drive the drive member of the coil and one of the feed members, so as to make them. rotate at predetermined speeds, and it comprises a device for modifying the peripheral speed of the reel of tape independently of the feed members: so as to maintain a predetermined ratio between the angular speed of the reel of tape and that of the inner peripheral coil winding carried by the coil. 23. -.Mechanism according to claim 3, characterized in that the reel comprises two parallel discs and a device making it possible to prevent parts of the tape from moving redially out of between the discs. 24. - Mechanism according to claim 23, characterized in that this device consists of an expandable collar surrounding most of the periphery of the discs and provided with parts spaced on its periphery penetrating radially towards the interior between the discs. . 25. Mechanism according to claim 24, characterized in that the collar has soft mouths spaced on its periphery intended to receive the disc backing berdules. 26. - Mechanism according to claim 23, charac- terized that the upper surface of the lower disc carrying the winding is made of a smooth plastic material coated with a uniform and continuous film of very fine colloidal particles adhering to it. drill to this surface and ... exhibiting an overlapping structure characteristic of a <Desc / Clms Page number 114> deposit of flake material obteuu from a dispersion in a liquid. 27. - Mechanism according to claim 23, charac- terized that the lower surface of the second disc has above the winding is covered with a coating absolutely identical to that described above, and this surface is intended to support the winding in the event that the winder is turned upside down. 28. - Mechanism according to claim 23, characterized in that the tape is a tape of flexible plastic material having at least one face coated with a magnetic layer, and coated with a thin, uniform and continuous film, conductive. electricity, colloidal graphite particles covering both sides of the. tape, part of this tape coming from the inner peripheral spirc of the winding and passing between the winding and one of the discs of the spool, the sliding friction existing between the rotating winding and the spool driving the hub and the disc at an angular velocity which is not significantly less than that of the outer turn of the winding, the graphite coated faces of the tape contacting the surface of the disc which carries the winding and the edges. side turns of the winding are rotated, in particular when the spool is turned over, while the tape is unwound radially outwards from the inner peripheral turn of the winding, 29. - Mechanism according to claims 7 and 21, characterized in that the coil and its circular plate are of large diameter and a device perment to limit the movement of the drive roller towards the axis of the coil <Desc / Clms Page number 115> EMI115.1 so that 1: ";: Üct cannot Y2lÜr in contact with a small or normal-sized coil. 50. - "" LT C, 'c7 ..; â next. : .. 1.'V.: IL1 ^ C: '. I ..'- Y ::' - 4 and 16, characterized in that the store being 3: 'x. i :. â '' t '.? : '5 ", é .." of the apparatus; the organs of: 3L = -t4? are mounted oscillating in the front part of the -.:L3 sk'.ß- so as to be able to tilt around a horizontal axis and it is provided dorL1 nipples at a certain lateral distance one of 1 -l1 ... 1. : \ :; re, protruded upward on the app # st and succeptible to engage in the store so 8. the aintcD.ir in its. predetermined active position, these nipples cooperating with the gu.id-3.gc organs of the ribbon inside the) 111: \ gs.zil1 do so as to switch them in a sound you que le. ', li; û' ? fW ost brought on. position 0:; - & 660, at P encontro â.e of a rossort which lifts 10 ribbon when 10 magazine is released from totons. 31 - Mechanism according to claim 4, characterized in cc that there are provided loviors d-, h .s3: rac; n back do tape guide organs which oscillate do tell;) so that the back part of the levers that port on the Ot ,,., '5, xlG â guide the tape rises and falls T =.? 7ti.e = 1leiwnt, the levers being otherwise mounted so as to move horizontally relative to the r.:. yg: ¯: sn a device sensitive to the movement of the commando organ in a direction allowing the levers to be anchored horizontally towards the guide members until 1 ex'x: r of the levers comes into contact with the guiding and then acting on response to a new movement of the control member in the mono sens, from mnièro to tilt the levers :, to lower J.1 0xt: "" r: i t, levers EMI115.2 and to lower the ribbon. <Desc / Clms Page number 116> 32. - Removable magazine for recording tape for use in the feed mechanism according to claims 1 to 31. 33. - Magnetic sound recording or reproducing apparatus comprising the feed mechanism according to claims 1 to 31.