US2234832A - Photoelectric transmitter - Google Patents

Photoelectric transmitter Download PDF

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Publication number
US2234832A
US2234832A US184138A US18413838A US2234832A US 2234832 A US2234832 A US 2234832A US 184138 A US184138 A US 184138A US 18413838 A US18413838 A US 18413838A US 2234832 A US2234832 A US 2234832A
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United States
Prior art keywords
lever
levers
bail
lock
controlled
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Expired - Lifetime
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US184138A
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English (en)
Inventor
Louis M Potts
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AT&T Teletype Corp
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Teletype Corp
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Priority to US184138A priority Critical patent/US2234832A/en
Priority to GB34358/38A priority patent/GB508650A/en
Priority to FR848183D priority patent/FR848183A/fr
Priority to CH235870D priority patent/CH235870A/fr
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Publication of US2234832A publication Critical patent/US2234832A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L17/00—Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code
    • H04L17/02—Apparatus or circuits at the transmitting end
    • H04L17/12—Automatic transmitters, e.g. controlled by perforated tape
    • H04L17/14—Automatic transmitters, e.g. controlled by perforated tape with optical sensing means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L17/00—Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code
    • H04L17/02—Apparatus or circuits at the transmitting end
    • H04L17/04—Apparatus or circuits at the transmitting end with keyboard co-operating with code-bars
    • H04L17/06—Contact operating means

Definitions

  • This invention relates to printing telegraph apparatus, and particularly to keyboard controlled signal transmitting mechanism.
  • An object of the invention is to generate telegraph signals in a photoelectronic device through the cooperation of a distributor controlled from a keyboard.
  • Another object oi. the invention is to provide overlap between keyboard and distributor operations in a keyboard transmitter.
  • the invention contemplates a keyboard mechanism including a set of code bars to be positioned characteristically according to the key lever depressed. Each of the code bars controls the corresponding positionment of an apertured slide bar.
  • a beam of light from a source of i1- lumination is directed toward a photoelectronic device, and generally disposed in the path of the beam are the slide bars and two coaxial cylinders which house the photoelectronic device.
  • the wall of the inner cylinder contains a slot parallel to the axis of the cylinder and somewhat longer than the span of the slide bars, this slot being in the light path.
  • the outer cylinder is rotatable under the control of a single revolution clutch, and is provided with a'plurality of peripheral apertures so positioned that they traverse the slot in the inner cylinder successively as the outer cylinder rotates.
  • the apertures in the outer cylinder are aligned with the slide bars and particularly with the apertures therein.
  • the slide'bars rest on a stationary slotted member, and their range of movement is to position their apertures in or out of registry with the slot in the stationary member. When an aperture is in registry, it permits a portion of the beam of light to impinge upon the surface of the rotatable cylinder.
  • the beam of light transmitted through the aperture in the slide bar is also transmitted through the slots in the two cylinders and impinges upon the photosensitive element. in the photocell, thus increasing the conductivity of the cell and generating a Signal impulse of a particular kind.
  • the aperture in a slide bar is positioned out of registry with the slot in the stationary support, light is prevented from passing through the corresponding slot in the rotatable cylinder, and
  • the conductivity of the cell remains unchanged during traversal of the slot in the inner cylinder by the particular slot in the outer cylinder, thus generating a signal impulse of a different kind.
  • the rotatable cylinder is released for one cycle of operation upon each depression of a key lever and is arrested automatically at the end of the cycle initiated by that key lever.
  • the linkage between the code bars and the slide bars includes no yield, so that when the slide bars are locked, the code bars are also locked, and they cannot be reset until the distributor closely approaches its rest position.
  • Fig. 1 is a perspective view of one embodiment of theinvention having portions broken away to show structural details
  • Fig. 2 is a side elevational View of the apparatus shown in Fig. 1;
  • Fig. 3 is a plan view of the apparatus shown in Fig. 2;
  • Fig. 4 is a perspective of one detail of the transmitter shown in Figs. 1 to 3, inclusive;
  • Fig. 5 is a development of cylindrical scanning elements shown in Figs. 1 to 3, inclusive;
  • Fig. 6 is a plan view of another embodiment of the invention.
  • Fig. 7 is a vertical sectional view taken approximately on the line 1-1 of Fig. 6;
  • Fig. 8 is a diagrammatic showing of an electrical circuit
  • Fig. 9 is an elevational view of the clutch tripping mechanism of the embodiment shown in Figs. 6 and 7;
  • Fig. 10 is an elevatlonal view partly broken away showing a modified keyboard mechanism at one stage of operation.
  • Fig. 11 is a view similar to Fig. 10 showing the same mechanism at a later stage of operation.
  • reference numeral H indicates a keyboard base casting to the front of which is secured a slotted comb l2.
  • Keylevers l3 extend through the slots in comb l2 to the interior of keyboard base casting H and are there pivotally supported on a common pivot rod (not shown) and are spring urged to their uppermost positions with respect to the slots in comb l2 by individual springs (also not shown).
  • Each of the key levers I3 is provided with a keytop [4 by means of which manual operation of the several key levers may be performed.
  • Code bars l6 extend transversely ofthe keyboard mechanism directly below the entire set of key levers l3.
  • the code bars are provided at their upper edges with notches which may be defined by one vertical edge and one oblique edge or by two oblique edges, the notching of the several code bars being variable with respect to the several key levers in accordance with the code which, in the preferred embodiment of the invention, is a permutation code comprising various combinations of marking and spacing signals.
  • Code bars I6 are slidable transversely of the keyboard base H from one to the other of two positions, and the sliding movement of the code bars is effected by the camming action exerted by a key lever.l3 upon the oblique edge of a notch during the operation of depressing the key lever.
  • the notching of the code bars I6 is such that for each permutational setting of code bars l6 by a key lever, no other key lever may be fully depressed, the reason for this being that the simultaneous depression of two key levers involves the inconsistent condition of attempting to present at least one of the code bars in both of its possible positions.
  • Each of the code bars l6 supports on one face thereof a pair of spaced pins l1 between which is disposed the lower end of a lock lever it! which is pivotally mounted upon a pivot pin l9 intermediate the ends of lock lever l8.
  • Keyboard base casting H is provided with a slot 2
  • a universal ball 22 is contained within keyboard base casting i I and extends transversely thereof below all of the key levers I 3 and in close proximity thereto.
  • Universal bail 22 is pivotally supported at its opposite ends upon pivot pins 23 and is provided near one end with a bracket 24 which includes an arm 26 that pro- :Iects upwardly from within the keyboard base I 6 through a slot 21.
  • the purpose of universal bail 22 is to trip a distributor clutch, and the manner in which this may be accomplished will be de scribed later. It may-be stated, however, at this point that upon the depression of any key lever I3, the universal ball 22 is rocked downwardly about its pivot pins 23, and the upper end of arm 26 which it supports is' thereby rocked outwardly.
  • the upper surface of which supports a plurality of flat slide bars 32.
  • Each of the slide bars 32 is provided with a single aperture 33 which, when sliding ovement is imparted to slide bars 32. is movable into or out of registration with a narrow slot 34 in the upper part of bracket 3
  • Each of the slide bars 32 is articulated to an individual lever 36 pivoted on pivot pin [9 adjacent to a corresponding one of the lock levers l8.
  • the number of slide bars 32, levers 36, lock levers l8, and code bars I6 is equal to the number of code elements involved in each of the permutation code combinations, which is preferably five, but which may, under conditions requiring a more extensive code. be six or more.
  • Each of the levers 36 has reed springs 31 secured to the opposite edges thereof, and the free ends of the reed springs are of sufficient width to engage the edges of the slide bar operating lever 36 and also the edges of the adjacent and associated lock lever I8, as is clearly disclosed in Fig. 4.
  • Reed springs 31 are so ten-' sioned that they seek engagement with both edges of slide bar operating lever 33 and associated lock lever l8, and it will be apparent from this that if a lock lever is rocked upon pivot pin i9 while the associated slide bar operating lever 36 is held stationary, one of the reed springs 31 will be moved by the lock lever out of engagement with the slide bar operating lever 36 which, in turn, will prevent the other reed spring from following the motion of lock lever l8.
  • Keyboard base I I has secured to the upper surface thereof a cylindrical housing 4
  • the focusing of the beam upon the reflector may be accomplished by moving cylindrical lamp support 42 within cylinder 4i to vary the distance between lamp 43 and lens 44 and reflector 46, the latter being stationarily supported.
  • Keyboard base ll supports, just forward of bracket 3!, a bracket 48 which is provided near its upper end with a circular aperture ifito which is fitted, to be stationarily supported thereby, a cylinder 49 having both ends open.
  • Cylinder 49 is provided, in the lower portion thereof, with an elongated slot) 5
  • is of sufflcient length to span all of the slide bars 32 and to extend a short distance beyond the slide bars at one end. Slots 34 and 5! may be of substantially the same length. On.
  • bracket 48 supports an adapter 52 which, in turn, supports the'base 53 of a photoelectronic device 54 that extends into stationary cylinder 49 and has its light sensitive cathode 56 substantially coextensive with slots 34 and 5
  • Keyboard base it supports electric motor ti to the rotor shaft of which is secured pinion bl.
  • llhis pinion meshes with a gear bl secured to signal distributor shaft 64 which is rotatably supported in bearings 66 carried by braclret t'l supported by keyboard base ll.
  • Shaft tt has secured thereto the driving element tl (Figs.
  • clutch throwout lever ll When clutch throwout lever ll is rocked away fromthe throw-out lug ill, compression spring ll urges driven memher llll into engagement with member bl whereby rotation is imparted to driven member ll from shaft Toward the end of a revolution, clutch throw-out lever iii, if permitted to respond to the influence of its biasingspring, returns to its positionin the path of clutch throw-out lug ll, shifts driven clutch member 69 axially of shaft t l by a camrning actiomand thus adects disengagement of the clutch members and arrestment of driven member td.
  • lllrlven clutch member Ell is slidably lreyed to a sleeve it which is also supported by shaft t l. lit its forward end, sleeve l6 engages and supports a cylinder ll which is closed at its rear most end, at which point it is supported by sleeve lll, and which is open at its foremost end, the words foremost and rearmost as used herein be ing related to the'front of the keyboard, the foremost and rearmost ends of cylinder ll being the left and right ends, respectively, as viewed in Fig. 2.
  • Cylinder ll is slightly larger than cylinder and is fitted over the latter in coaxial relation with respect thereto and bears the same relation; namely, coaxial, with respect to sleeve lit by which it is supported. It will be apparent from this that when sleeve 76 is rotated upon the tripping of clutch throw-out lever ll, cylinder ll is also rotated.
  • cylinder ll is provided with a plurality of circumferentially extending apertures that are oflset both axially andcircumferentially with respect to each other successively.
  • cylinder fl is provided with a.
  • slot it beyond the rearm-ost of the slide bars 32 but within the range of slots lit and El, so that as cylinder ll is rotated, light may be transmitted invariably through slot is to cathode 56 of the photoelectric cell bl. It maybe added that cylinder W is so mounted upon the sleeve It that when the latter is in its rest position, due to the separation of the clutch elements tt and bl by clutch throw-out lever ll, slot "ll is in registry with slots ll and bl so that light impinges continuously upon cathode ht during the rest interval. The blanll portion of cylinder ll between the end of slot ld and the beginning of the first of the slots lt provides for the complete exclusion. of light from photoelectric cell ht during a portion of a cycle of rotation of cylinder ll.
  • sleeve ld is provided with cams ti and hi.
  • loclr bail til pivotally supported upon screws ll has integral therewith an arm lt supporting at its free end a cam follower roller ll which-may engage cam dl.
  • the loot: levers it are provided with laterally exte'n'ding protections ll (rightwardly as viewed in Fig. 3) each of which has an upstand ing loclring lug dd.
  • the position of locking bail til with respect to lugs dd is such that when a code bar is shifted to its extreme right-hand position, thus rocking its associated locking lever it to its extreme counterclockwise position, the locking lug ll of that'loclr lever is presented just to the left (as viewed inldlg. 3) of loclr bail bl.
  • the loclring lug llll of that loclr lever is presented just to the right of loclr bail ll (also as viewed in Fig. ll).
  • Loclr bail ill also has integral therewith an arm ll which, when follower roller d'l has been lifted to its'outermost position with respect to cam ti, is engagedand held by a latch dl' secured to a sleeve ill roclrably supported upon a stud t l. at
  • sleeve til has secured thereto a lever which has an arm llll engageable with a stop screw llt for limiting the counterclockwise motionof lever tt, sleeve ll, and latch ll and which also has or depending arm til the lower end of which is disposed in the path of a shoulder ill integral with a linlr ltl which is articulated at its forward end to arm lt carried by universal bail ll.
  • Linlr ltl has a portion of its upper edge in an oblique plane adjacent to a screw ill-l carried by a stationary braclret supported by lreyboard base ll.
  • Tension spring lll l supports linlr ltl so that its upper edge is in engagement with screw ldll.
  • linlr ltll When linlr ltll is moved forwardly by operation of universal bail lb from a key lever it; its shoulder lll engages arm lll of lever db and imparts cloctzwise rotation thereto, l'his cloclrwise rotation is transmitted through sleeve til to latch arm, at which is also roclred cloclrwise and permits arm ll to loclr bail til to escape.
  • Looking bail 83 is also provided with a laterally extending projection I06 from which depends an arm E01 terminating directly above an arm I08 integral with clutch throw-out lever 12 and extending rightwardly therefrom (as viewed in Fig. 3).
  • the relationship of depending arm 501 to clutch throw-out lever arm I08 is such that when arm 9
  • Another lock bail designated by the reference numeral III, is also pivoted on pivot screws 84 and is so positioned with respect to upstanding lugs 2 carried by leftwardly extending projections H3 of slide bar operating levers 36 (as viewed in Fig. 3) that the lugs N2 of those slide bar levers 36 that are rocked into extreme counterclockwise positions are presented to the left of the locking blade of lock bail III, and the lugs II2 of those slide bar levers that are rocked to their extreme clockwise position are presented to the right of lock bail III.
  • Lock bail III has integral therewith an arm II4 which is provided with a cam follower roller I I6 which continuously engages cam 82.
  • bail III The function of bail III is to lock the slide bars 32 in whatever positions they may have been set, so that their setting shall not be disturbed during the scanning of slot 5
  • ball 83 may be lifted by its cam 8
  • upon cam follower roll 81 results in release of clutch throwout lever 12, so that it returns to the position in which it may effect disengagement of clutch elements 68 and 69, and also results in clockwise rocking of arm 9
  • might not escape from latch 92, and the cycle of operation of distributor cylinder 11, intended to be initiated corresponding to the combination established by depression of the key lever, would not be initiated and, therefore, a. sig nal combination would not be transmitted.
  • an additional lock is provided upon the key levers, this lock being effective through the universal bail 22.
  • has arm I22- extending under the driven sleeve to which driven clutch element 69 is keyed and carrying at its free end a cam follower roll I23, which engages a cam I24 fixed to driven clutch element 69.
  • An arm I28 extends in the opposite direction passing across link I02 near the free or rearmost end thereof, and also passing between upstanding arms I21 of a bifurcated block I28, Fig. 3, secured to keyboard base II.
  • link I02 At its free end, link I02 is provided with an upstanding shoulder I29 which must pass through the plane in which lever arm I26 is operable in response to operation of the universal bail 22 suflicient to effect tripping of clutch throw-out lever 12.
  • Cam I24 normally holds lever arm I26 out of the path of shoulder I29.
  • Lever arm I26 remains in the path oi shoulder I 29 until after cam follower roll til has descended from the apex of cam ti to the extent that unlatching of lever arm tI by oper ation of link I02 can be effected.
  • Cam follower roll I23 then rides out of the nadir portion of cam IM and lifts lever arm I26 out of the path of shoulder I23. It will be evident from this that during the interval in which lever arm I23 is presented in its extreme clockwise position, link Itt cannot be operated sufiiciently to effect rocking of latch 32.
  • lever arm Itt is lifted and link I62 may then be operated through a full cycle by universal bail it.
  • Bifurcated block ltd serves as a guide for the free end of lever arm Itt and prevents link I02 from operating through a full cycle at a time when such operation is undesirable.
  • FIG. 8 The electrical circuit for the transmitter hereing described is shown schematically in Fig. 8.
  • the previously identified lamp l3 and motor ti are connected across conductors ItI and I32 which are intended to be connected to any suitable source of power, as by means of cord plug Iild.
  • Photoelectric cell 54 is connected to the input circuit of an amplifier I34, indicated only symbolically in Fig. 3.
  • amplifier I34 For a complete disclosure of an amplifier to which photoelectric cell 54 may be connected, reference may be had to U. S. Patent No. 2,177,077 granted on Oct. 24, 1939, to lb. lI/l. Potts.
  • One of the output terminals of amplirler I34 may be connected to telegraph line I36 and the other may be connected to ground.
  • At the remote terminal of line I36 there may be connected one of the terminals of the selector magnet of a printing telegraph apparatus indicated symbolically at I37, the other terminal of which may be connected to ground as indicated.
  • photoelectric telegraph transmitter herein described is adapted to transmit start-stop permutation code signals each signal combina tion representing a character consisting of a, definite number of impulses of marking or spacing nature preceded by a start impulse, usually of spacing nature, and followed by a stop or rest impulse, usually of marking nature.
  • start-stop permutation code signals each signal combina tion representing a character consisting of a, definite number of impulses of marking or spacing nature preceded by a start impulse, usually of spacing nature, and followed by a stop or rest impulse, usually of marking nature.
  • is started, lamp 43 is illuminated, and amplifier I34 is placed in condition to be controlled by photoelectric cell 54.
  • slide bars tt may be positioned to intercept light transmitted through slot 34 in bracket ti, these being the slide bars that are presented their extreme-left-hand positions, as viewed in Fig. 3, and others may be presented in their ertrerne right-hand positions with their apertures 33 in registry with slots 34 and BI to permit light to impinge uponcathode 56 as the corresponding slots 78 traverse apertures 33.
  • the rotating cylinder I1 thus serves as a transmitting distributor to cause photoelectric cell 54 to be rendered conductive or non-conductive a1- ternatively in accordance with the setting oi the several slide bars 32.
  • Photoelectric cell 54 controls amplifier I34 which, in turn, impresses upon telegraph line I 36 signaling impulses corresponding to the setting of slide bars 32. After the last of slots I8 has traversed slot 5
  • cam I24 operates upon its follower roll I23 to lower lever .arrn I26 into the path of shoulder I29 on universal bail link I02 so that the universal bail cannot be operated fully during the critical interval when lever arm 9
  • lock levers I8 will be set in a new permutational arrangement in accordance with the signal combination represented by the key lever, but the slide bar levers 36 being at this time locked will not be correspondingly moved and certain of the reed springs 31 will be shifted out of engagement with their slide bar levers 36 thus establishing an unbalanced condition which will result in setting of the slide bar levers 36 in correspondence to the setting of lock-levers I8 when near the end of the cycle of rotation of cylinder 11, lock bail III shall be lifted.
  • depending arm I81 withdraws clutch throwout lever 12 from the path of clutch throw-out lug 13 so that upon the completion of a revolution cylinder 11 will not be arrested but will continue to rotate to achieve the transmission of the signal combination which had been stored in look levers I8.
  • lock bail III is lifted and the slide bars are permitted to be set in correspondence with the positions of lock levers I8, whereupon bail III is again lowered to lock the slide bars 32 in their new positions.
  • FIGs. 6 and 7 Another embodiment of the invention is shown in Figs. 6 and 7, this embodiment differing from that already described in the positions of the source of illumination and of the photo-electric cell and in the further fact that there is no provision for overlap as between the transmission I of a signal combination representing one character and the resetting of the code bars to represent another character.
  • motor shaft I4I carries pinion I42 meshing with gear I43 fixed to driving clutch portion I44 carried by distributor shaft I46.
  • clutch element I41 is slidably keyed to cam sleeve I48 also mounted on shaft I46 and is urged into engagement with clutch driving element I44 by compression spring I49 but is normally restrained from such engagement and held arrested by clutch throw-out lever I5I.
  • a slotted distributor cylinder I52 identical with cylinder 11 is rotatably supported by cam sleeve I48, and inside cylinder I52 is mounted a stationary cylinder I53 identical with cylinder 49 and having a single slot I54 parallel to its axis.
  • a long filament lamp I56 and cylindrical lens I55 are mounted inside the stationary cylinder I53, whereby a thin wide beam of light is focussed through slot I58.
  • Block I51 having a concave cylindrical surface conformed to the contour of rotatable cylinder I52 and presented in close proximity to the external surface of that cylinder.
  • Block I51 has an elongated slot I58 in vertical alignment with slot I54 in stationary cylinder I53.
  • Block I51 also has a concave cylindrical surface presented downwardly in conformity with a stationary cylinder I59 which is supported in engagement with the lower concave surface of block I51 and which has an elongated slot I66 coextensive with slots I58 and I54 and in vertical alignment with those slots.
  • Cylinder I59 houses a photoelectric cell I6I having a cathode I62. It will be apparent that the positions of lamp I56 and photocell I6I could, if desired, be reversed.
  • Block I51 is provided with a horizontally extending slot of sufficient height and width to-receive, confine, and guide a plurality of apertured slide bars I63 substantially identical with the slide bars 32 shown in Figs. 1 and 3.
  • Slide bars I63 are arranged to be presented in either of two positions to dispose their apertures correspondingly in or out of alignment with slot I58 in block I51.
  • Each of the slide bars I63 is articulated directly to a lock lever I64 pivoted on pivot pin I66 supported by keyboard base casting I61.
  • Lock levers I64 are controllable from permutation code bars (not shown) in the same manner as the previously described lock levers I8 are controlled. There is no yield between lock levers I 64 and slide bars I63 and, therefore, the setting of the lock levers I64 cannot be disturbed until the last of the several slide bars I63 has been scanned by the corresponding peripheral slot in rotatable cylinder I52.
  • a single lock bail is provided to prevent disturbance of the lock levers I 64 and slide bars I63 during the transmission of a signal combination, this bail being designated by the reference numeral I68 pivoted on screws I69, as shown in Figs, 6 and 7.
  • Bail I68 has integral therewith an arm I12 at the free end of which is supported a cam follower roll I13 which continuously engages a cam I14 secured to cam sleeve I48. In the rest condition of the apparatus, cam I14 holds lock bail I68 out of blocking relation to upstanding lugs I16 carried at the upper ends of lock levers I64.
  • lock bail I68 is identical with that of lock bail III in the previously described embodiment, the bail being lowered as soon as the distributor cylinder I52 begins to rotate; namely, during the transmission of the start impulse while the blank portion of cylinder I52 is passing across slots I54 and I58 and being lifted after the last of the slide bar conditions has been scanned by the last of the peripheral slots, and while the rest impulse slot is traversing slots I54 and I58.
  • a universal bail link I11 is provided for tripping clutch throw-out lever I5I which is biased to clutch arresting position by spring I15, this link differing from previously described link I02 in that no blocking shoulder corresponding to the shoulder I29 of link I62 is required.
  • Link I11 operates a bell crank lever I18 which is similar to the previously described lever 99 except that it is not associated with a latch controlling sleeve but has instead an arm I19 disposed above and in close proximity to the free end of a rightwardly extending arm I8I of clutch throw-out lever I5I (as viewed In Fig. 6).
  • Bell crank lever H8 is rocked in the same manner as lever 99 and in being so rocked its arm "9 depresses the free end of clutch throw-out lever arm I 6
  • FIG. 10 and 11 A further embodiment of the invention is shown in Figs. 10 and 11, this being a modification of the overlap mechanism included in the transmitter exemplified in Figs. 1 to 5, inclusive.
  • This embodiment differs from that of Figs. 1 to in that in the overlap mechanism already described, the burden of flexing any number up to five of the springs 31 is directly upon the key levers I4, and due to the varying number of springs to be flexed, according to the sequence of characters, any key will require more effort to operate at one time than at another, and the touch will therefore be irregular, whereas, in the modification to be described, power available within the transmitter is employed for flexing the springs, and none of this labor burdens the keys, so that a uniform touch is afforded.
  • lock levers I9I connected to code bars I92 in the same manner as lock levers I8 are connected to code bars I6 in Figs. 1 and 2, are pivoted on pivot rod I98. Also pivoted on rod I93 adjacent to individual lock levers I9I are slide bar controlling levers I94, each of which carries a pin I96 disposed in an elongated slot I91 of a light shutter slide bar l98. Slide bars I98 are provided with individual locl' .ig lugs I99. which are presented on either side of a lock bail 20I as slide bars I98 are moved from one to the other of their two possible positions. Lock bail 20I corresponds to lock bail III inFigs. 1, 2, and 3.
  • lock levers I 9I are relatively narrow, and the edges are substantially parallel to a center line through the levers.
  • the upper ends of slide bar controlling levers I94 are relatively broad and the edges slope oppositely from a mid-point thus providing opposite camming surfaces.
  • Reed springs 202 similar to reed springs 31, are presented on opposite sides of lock levers I9I and slide bar controlling levers I94, and at the points of engagement of a pair of springs 202 with a lock lever I9I and slide bar controlling lever I94, those levers are of the same width, so that the springs 202 tend to center levers I94 with respect to levers I9I.
  • slide bar I98 in the new position; namely, its right-hand position, as viewed in Fig. 11, is accomplished. when bail 20I is lowered to its dotted line position into the'path of lug I99.
  • lock levers I9I and slide bar operating levers I94 may be unlocked and reset according to a new signal combination.
  • Slide bar operating levers I94 are not locked during the transmission of a signal combination, as in the embodiment first described but onlyslide bars I99 are so locked.
  • reed springs 91 in the first described embodiment operate to set the slide bars 32 according to the setting of lock levers l8, in the embodiment shown in Figs.
  • a telegraph transmitter adapted to be controlled by a keyboard device, a key lever op- ,erated selector mechanism, a plurality of light shutters controlled by said selector mechanism. a photoelectronic impulse generator, and means for scanning said light shutters to control said impulse generator.
  • a telegraph transmitter adapted to be controlled by a keyboard device, a key lever operated selector mechanism, a plurality of light shutters controlled by said selector mechanism, a photoelectronic impulse generator, and a rotatable scanning member having an aperture in alignment with each of said light shutters for controlling said impulse generator.
  • a telegraph transmitter adapted to be controlled by a keyboard device, a key lever operated selector mechanism, a plurality of light shutters controlled by said selector mechanism, a photoelectronic impulse generator, and a rotatably mounted cylindrical scanning member having a circumferential aperture in alignment with each of said light shutters for controlling said impulse generator.
  • a telegraph transmitter adapted to be controlled by a keyboard device, a key lever operated selector mechanism, a plurality of light controlled by a keyboard device, a key lever controlled selector mechanism, an impulse generating mechanism, means controlled by said selector mechanism for controlling said impulse generating mechanism, means for locking said selector mechanism upon the operation thereof, means for locking said selector controlled means, and means for unlocking said selector means after the locking of said selector controlled means and during the generation of impulses under the control of said locked selector controlled means.
  • a keyboard including a plurality of keys, a set of permutation bars controlled by said keys, 8. transmitting circuit, photoelectric signal generating means connected to said circuit, and means controlled according to the operation of said permutation bars fordetermining the signals to be generated by said photoelectric means.
  • a transmitting device a plurality of selectively operable keys, 9. set of permutation bars controlled by said keys, a photoelectric instrumentality, means controlled according to the operation of said permutation bars for controlling the action of the photoelectric instrumentality, and means for transmitting code signals according to the action of the photoelectric instrumentaiity.
  • a telegraph transmitter a plurality of selectively operable keys, a plurality of light shutters, a photoelectric device, means controlled by the keys for operating said shutters in varying permutations, and means for controlling said photoelectric device in accordance with the operation of said shutters to eflect the transmission of code signals.
  • a photoelectric transmitter a plurality of light shutters, key operated means for effecting the permutational setting of said shutters, and means including a photoelectric device for transmitting start-stop telegraph signals according to the control of said light shutters.
  • a photoelectric transmitter including a plurality of keys, a master light shutter, a plurality of secondary light shutters, means for operating the master shutter invariably upon the operation of any key, means for operating the secondary shutters variably according to the key operated, and photo-sensitive means for generating code signals according to operation of the secondary shutters.
  • a light shutter device for determining the character of the signals, a light shutter device for timing the elements of the signals, selector mechanism for operating the first mentioned shutter device variably, and means for operating the last mentioned shutter device invariably.
  • a variably operable light shutter device In a photoelectric signal transmitter, a variably operable light shutter device, an invariably omrable light shutter device, means for variably controlling the flrst mentioned light shutter device, and means associated with the last mentioned means for initiating operation of the second mentioned shutter device.
  • a keyboard mechanism including a plurality of keys, permutation bars controlled by said keys, primary signal controlling means controlled by said permutation bars, secondary signal controlling means controlled by said primary means, means for locking said primary and secondary means successively, and means for unlocking said primary means substantially immediately after the locking of said secondary means.
  • a keyboard mechanism including a plurality of keys, permutation bars controlled by said keys, primary signal controlling means controlled by said permutation bars, secondary signal controlling means controlled by said primary means, independent 1y operable locking means for said primary and secondary signal controlling means, and yieldable means interconnecting said primary and secondary means for affording movement of either of said primary and secondary means while the other is locked for a particular signal to be transmitted.
  • a telegraph transmitter including a plurality of keys, code bars controlled by saidkeys, primary signal controlling means controlled by said code bars, secondary signal controlling means controlled by said primary means, and yieldable means for biasing said secondary means to follow the movement of said primary means whereby signals in accordance therewith may be transmitted.
  • a keyboard mechanism including a plurality of keys, code bars controlled by said keys, a rotatable signal distributor, key controlled means for releasing said distributor for rotation to transmit signals in accordance with the setting of said code bars, means for locking said key controlled means upon operation thereof, cam operated means for restoring said locking means to unoperalted condition, and means for locking said key controlled means during the restoration of said first mentloned locking means.
  • a keyboard mechanism including a plurality of keys, code bars controlled by said keys, a rotatable signal distributor, a keyoperaited universal bail, means controlled by said bail for releasing said distributor for rotation to transmit signals in accordance with the setting of said'code bars, means for locking said ball upon operation thereof, means associated with said distributor for rest-oring said locking means to unoperated condition, and means also associated with said distributor for imposing a locked condition upon said bail during the restoration of the first mentioned locking means.
  • a keyboard mechanism including a plurality of keys, a universal bail operable 'bysaid keys, a plurality of code bars also operable by said keys, means operable by said bail for locking said code bars, a signal distributor, and means operable by said locking means for setting in operation said distributor whereby signals in accordance with the operation of said bars will be transmitted.
  • a keyboard mechanism including a plurality of keys, code bars to be set permutatively by said keys, a plurality of levers articulated to said code bars, a.
  • a keyboard mechanism including a plurality of keys, code bars to be set permutatively by said keys, a plurality of levers articulated to said code bars, a plurality of levers individually associated with the first mentioned levers, flexible members for causing the second mentioned levers to follow movement of the first mentioned levers, a plurality of impulse controlling elements controlled by said second mentioned levers, and means operable by power independent of said keys and set in operation by said keys for moving said second mentioned levers through distances greater than those imparted by said first mentioned levers.
  • a photo-electric impulse generator adapted to be controlled by a keyboard device, a photo-electric impulse generator, means for producing a light beam, means controlled variably by said keyboard device for dividing a portion of said beam of light into corresponding individual beams of light, and means operated invariably by said keyboard device for admitting to said photo-electric impulse generator a portion of the remainder of said first mentioned light beam and the individual light beams in predetermined succession.
  • a telegraph transmitter adapted to be controlled by a keyboard device including a plurality of key levers, a permutation code devicecontrolled by said key levers, a photo-electric impulse generator, means for producing a beam of light, means controlled permutably by said permutation cod device for preparing variable light paths from said beam to said photo-electric impulse generator, and means operated invariably by said keyboard device for completing said light paths.
  • aperm'utationcode device responsive directly to said keyboard device, means ior producing a light health, a photoelectric impulse generator, means having light transmitting apertures for distributing light to said photo-electric impulse generator, and means permutably controlled by said permutation code device for transmitting to the surface of said distributlng means light from said beam in variably disposed areas.
  • impulse generating means impulse distributing means, a timing element controlled by said keyboard device, a timing element controlled by said distributor, and means controlled by said timin elements for coordinating the operation of said keyboard device and said distributingmeans.
  • signal transmitting means a set of elements, a set of selectors corresponding in number to said elemenits, means operated permutably by said selectors for setting said elements correspondingly, a source of light, a power driven rotary mechanism cooperating with said elements in the operation of said transmitting means by light from said source, and means for setting said selectors.
  • signal transmitting means a set of elements, a set of selectors corresponding in number to said elements, means operated permutably by said selectors for setting said elements correspondingly, a source of light, a power driven rotary mechanism arranged for uniformly rendering said source of light effective on said transmitting means to controlthe length of each signal impulse transmitted thereby, and means for setting said selectors.
  • signal transmitting means a set of elements, a set oi selectors corresponding in number to said elements, means operated perm-utably by said selectors for setting said elements correspondingly, a source of light, a power driven rotary mechanism having means for uniformly rendering said source of light efiective at the beginning of each signal, and means for successively rendering the source of light efieotive on said transmitting means as determined by the position of said elements.
  • signal transmitting means a set of elements, a set of selectors corresponding in number to said elements, means operated permutably by said selectors for setting said elements correspondingly, a source of light, a power driven rotary mechanism cooperating with said elements in the operation of said transmitting means by light from said source, means to start said rotary driven mechanism at the beginning of each signal, means to stop the same at the end of each signal, and a keyboard for controlling said starting and stopping means and for setting said selectors.
  • signal transmitting means a set of elements, a set of selectors corresponding in number to said elements, means operated permutably by said selectors for setting said elements correspondingly, a source of light; a rotary power driven mechanism cooperating with said elements in the operation of said transmitting means by light from said source, a start and stop clutch for rotating and timing the operation of said mechanism during each signal period, a keyboard for tripping said clutch and for setting said selectors, and a lock for said keyboard controlled by said mechanism and arranged to release said keyboard for reoperation at the end of each signal period.
  • signal transmitting means for controlling all transmitted impulses, a set of elements for controlling the operation of said transmitting means, a set of selectors, means operated permutalbly by said se- 5 lectors for setting said elements correspondingly, a source of light, a rotary driven mechanism having a series of successively operating sections cooperating withsaid elements in the operation of said transmitting means by light from said .0 source in accordance with the position of said selectors, a power driven start and stop clutch for continuously advancing and timing the operation of said rotary mechanism during each signal period, a keyboard, and means operated 55 thereby independently of said transmitting means for tripping said clutch and for operating said selectors.
  • signal transmitting means a set of selectors, a source of light, a rotary member having a series of successively operative sections for eflecting th operation of said transmitting means by light from said source of light to transmit uniform starting impulses followed by a series of selecting impulses varied 5 in accordance with the setting of said selectors,
  • a power driven start and stop clutch for rotating said rotary member, and means independent of said transmitting means for tripping said clutch and setting said selectors.
  • a keyboard mechanism including a. plurality of keys, code bars controlled by said keys, a rotatable distributor, key controlled means for releasing said distributor for rotation to transmit signals in accordance with the setting of said bars, means controlled by said code bars for controlling the character of the signals transmitted by said distributor, means for locking said key controlled means upon operation of said distributor, and means for thereafter locking said code bar controlled means and releasing said key controlled means whereby they may be reset.
  • a light shutter device permanently associated with said transmitter for determining the character of the signals, a light shutter device for timing the elements of the signals, means for operating the first mentioned light shutter device variably, and means for operating the last mentioned shutter device invariably.
  • a keyboard mechanism including a plurality of keys, permutation bars controlled by said keys, primary signal con-trolling means controlled by said bars, latch controlled means for locking said signal controlling means, secondary signal controlling means controlled by said primary signal controlling means, cam controlled means for locking said secondary signal controlling means, and means for unlocking and relatching said latch controlled locking means following the locking of said secondary signal controlling means.
  • a keyboard mechanism including a plurality of keys, permutation bars controlled by said keys, primary signal controlling means controlled by said bars, means for locking said primary signal controlling means, m-eans for latching said locking means in unlocking position, means controlled by said keys ,for releasing said latching means, secondary signal controlling means controlled by said primary signal controlling means, means for locking said secondary signal controlling means, rotatable cam means for operating said last mentioned locking means, and rotatable cam means for relatching said first mentioned looking means following the operation of the second mentioned locking means to lock said secondary signal controlling means.
  • a key lever controlled mechanism adapted to be controlled by a keyboard device, a key lever controlled mechanism, an impulse generating mechanism, means controlled by said key lever controlled mechanism for controlling said impulse generating mechanism, means for locking said key lever controlled mechanism, means for locking said impulse generating mechanism controlling means, and cam controlled means for operating both of said locking means in a predetermined sequential manner whereby said key lever controlled means is released before said impulse generating mechanism controlling means.
  • a key lever controlled mechanism adapted to be controlled by a keyboard device, a key lever controlled mechanism, an impulse generating mechanism, means controlled by said key lever controlled mechanism for controlling said impulse generating mechanism, primary means for locking said key lever controlled mechanism, means for locking said impulse generating mechanism controlling means, means for releasing said primary locking means, secondary locking means for said key lever controlled mechanism, and means for operating said secondary locking means prior to the release of said primary means and for releasing said secondary means after the release of said primary means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
US184138A 1938-01-10 1938-01-10 Photoelectric transmitter Expired - Lifetime US2234832A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US184138A US2234832A (en) 1938-01-10 1938-01-10 Photoelectric transmitter
GB34358/38A GB508650A (en) 1938-01-10 1938-11-25 Photo-electric telegraph transmitter
FR848183D FR848183A (fr) 1938-01-10 1938-12-30 Appareil télé-imprimeur
CH235870D CH235870A (fr) 1938-01-10 1939-01-06 Emetteur télégraphique à clavier.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US184138A US2234832A (en) 1938-01-10 1938-01-10 Photoelectric transmitter

Publications (1)

Publication Number Publication Date
US2234832A true US2234832A (en) 1941-03-11

Family

ID=22675705

Family Applications (1)

Application Number Title Priority Date Filing Date
US184138A Expired - Lifetime US2234832A (en) 1938-01-10 1938-01-10 Photoelectric transmitter

Country Status (4)

Country Link
US (1) US2234832A (fr)
CH (1) CH235870A (fr)
FR (1) FR848183A (fr)
GB (1) GB508650A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2432527A (en) * 1945-10-27 1947-12-16 Sidney Robert Gordon Keyboard control system
US2482242A (en) * 1948-06-09 1949-09-20 Remington Rand Inc Code selector
US2658940A (en) * 1945-10-26 1953-11-10 Western Union Telegraph Co Optical scanning device
US2727683A (en) * 1946-01-11 1955-12-20 Philip H Allen Registers
US2751148A (en) * 1956-06-19 H allen ctal
US2893632A (en) * 1946-01-11 1959-07-07 Philip H Allen Registers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2751148A (en) * 1956-06-19 H allen ctal
US2658940A (en) * 1945-10-26 1953-11-10 Western Union Telegraph Co Optical scanning device
US2432527A (en) * 1945-10-27 1947-12-16 Sidney Robert Gordon Keyboard control system
US2727683A (en) * 1946-01-11 1955-12-20 Philip H Allen Registers
US2893632A (en) * 1946-01-11 1959-07-07 Philip H Allen Registers
US2482242A (en) * 1948-06-09 1949-09-20 Remington Rand Inc Code selector

Also Published As

Publication number Publication date
GB508650A (en) 1939-07-04
CH235870A (fr) 1944-12-31
FR848183A (fr) 1939-10-24

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