US3215246A - Typewriter comprising improved keyboard and associated printing means - Google Patents

Typewriter comprising improved keyboard and associated printing means Download PDF

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Publication number
US3215246A
US3215246A US243441A US24344162A US3215246A US 3215246 A US3215246 A US 3215246A US 243441 A US243441 A US 243441A US 24344162 A US24344162 A US 24344162A US 3215246 A US3215246 A US 3215246A
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Prior art keywords
disc
symbol
keys
lever
shaft
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US243441A
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English (en)
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Zanaboni Nino
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J5/00—Devices or arrangements for controlling character selection
    • B41J5/08—Character or syllable selected by means of keys or keyboards of the typewriter type
    • B41J5/10—Arrangements of keyboards, e.g. key button disposition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2217/00—Facilitation of operation; Human engineering
    • H01H2217/028—Facilitation of operation; Human engineering on planes with different or alterable inclination, e.g. convex plane

Definitions

  • FIGURE 1 is a perspective View of the typewriting machine
  • FIGURE 2 represents the mechanism serving to rotate FIGURE 9 is the plane development of a part of the shaped discs.
  • FIGURE 10 represents schematically the correspondence between pressed finger-keys and symbols imprinted on the paper.
  • FIGURE 2 the casing 1 of the type-writing machine of the present invention, is provided with a pivoting shaft 2 journalled thereto on which is rotatably mounted an idler gearwheel 3 rotated or driven by any well known driving means, as for example an electric motor, not shown.
  • a pulley 4 fixed to shaft 2 adjacent gear wheel 3 is rotatably driven by gearwheel 3 by means of a clutch of a conventional type only shown partially in FIGURE 2.
  • FIGURE 2 illustrates a stud member or bar 5 which can move into a groove 6 disposed in pulley 4 in such a manner that when bar 5 abuts rod means two arms 8 which in turn are pivotally disposed on a shaft 9 fixed to casing 1.
  • the machine is provided with finger-keys 10a, ltib, 10c, 10d, 10a having levers 11 pivotally disposed on fixed shaft 9 and provided at their outer ends with projections or protrusions 12 placed under rod 7. Therefore, when' Patented Nov. 2, 1965 any of the finger-keys is pressed downwardly, rod 7 is lifted, thus causing the rotation of shaft 2 since bar 5 clears rod 7 in its raised position.
  • Each finger-key returns to its initial position by means of spring members which are not shown in the figure, once the manoeuvre ceases, and therefore rod 7 resumes its lowered position.
  • stud 5 interferes with rod 7 to disconnect the clutch and stop rotation of shaft 2, while the driving means continuously rotates gearwheel 3. This cycle is repeated each time a finger-key is pressed and released.
  • Each lever 11 is provided at its inner end or other end with a small elastic wire steel rod 13, provided with a small roller 14 on the end engaged in the U shape fork 15 of a lever 16.
  • a small elastic wire steel rod 13 provided with a small roller 14 on the end engaged in the U shape fork 15 of a lever 16.
  • Levers 16 are connected respectively with keys 10a, 19b, 10c, 10d, 10c and have their other ends fitted in discs or selecting members 17a, 17b, 17c, 17d, 172 having a cylindrical contour formed of a succession of alternating notches 18 and protrusions 19 in the peripheral circumference thereof. Further on, in the description, the reference numbers 18 will be marked by indices and letters so as to indicate the different notches of each single disc.
  • the discs 17 are idly mounted on a shaft 20 journalled or pivotally connected to casing 1 of the machine. Thus when pressing on a key the respective disc connected therewith is displaced a certain angular distance or rotation about shaft 20.
  • supports 21 Disposed completely around the circumferential edges of the discs, and at a certain distance from them, are supports 21 fulcrumed by pivot member 22 fixed to casing 1 or to a part of the machine.
  • Supports 21 are provided with elongated arms 23 which are in turn connected to small hammers 24, 24', 24" etc. which can move in a radial direction away from the axis of a gearwheel 25.
  • Springs constantly urge the hammers toward the gearwheel 25.
  • Gearwheel 25 is disposed for oscillation around shaft 21) on which it is idly mounted. This movement of 25 is transmitted by a cam 26 keyed on shaft 2 in contact with a roller 27, fitted to one end of a lever 28, which pivots around the fixed shaft 9.
  • lever 28 is pivotally connected by pivot pin 29 on gearwheel 25 and pivots, eccentrically with respect to the centre line or axis.
  • the wheel 25 is thus submitted to angular oscillations in order that each one of its teeth 25' moves a corresponding small hammer 24, 24', 24" etc. in contact with the wheel radially outwardly.
  • a key or protrusion 20' On the same shaft 20 is a key or protrusion 20' on which a disc 30 is slidably disposed axially of shaft 20 and which disc 30 carries at convenient distances on its cylindrical surface the symbols (letters, numbers, etc.) which are to be impressed on the paper.
  • lever or stop member 31 On shaft 20 lever or stop member 31 is fixedly connected.
  • the number of hammers 24, 24', 24" etc. and the number of teeth 25" provided are equal to the number of symbols borne by disc 30 and the number of hammers and teeth is equal to the number of finger-keys provided plus the number of possible combinations of finger-keys that can press simultaneously.
  • the lever 31 is of such a length that when the lever rotates with shaft 20, it will not interfere with the small hammers disposed in a position radially away from the centre, but will interfere only with the particular hammer lowered and disposed in the lined-up notches 18. Therefore, for each single hammer 24, 24 etc. there is a corresponding symbol on disc 30, which corresponds to lever 31 stopping against the respective corresponding hammer and to disc 30 stopping in a predetermined angular position.
  • the means which cause rotation of disc 31) and lever 31, are a cam 32 fitted or fixed to shaft 2, in contact with a roller 33 fixed to one end of a lever 34 fulcrumed to the fixed shaft 9 and provided at the other end with gear sector or member 35.
  • the sector 35 meshes with a pinion 36 idly mounted on shaft 20 and secured to shaft 20 by means of unidirectional connection 37, partially shown in FIGURE 2 and being of a conventional type.
  • gear sector 35 transmits motion to shaft 20 and then to disc 30, in the direction of the arrow A, during its downward movement as shown by arrow B, while when oscillating in the opposite direction it transmits no motion to disc 30.
  • cam 38 fixed to shaft 2 and conveniently timed with respect to cam 32 is in contact with roller 39 on one end of a lever 40 idly fulcrumed on fixed shaft 9 and having its other end provided with a bent member or stop clamp 41.
  • a wheel 42 On shaft 20 and in correspondence to clamp 41 is keyed a wheel 42 provided with a number of teeth equal to that of wheel 25.
  • the lever 40 during a complete revolution of shaft 2, makes one oscillation and thus its bent part 41 frees and stops one tooth of wheel 42.
  • Spring 43 fitted at one end to lever 34 and at the other end to casing 1 pulls downwardly in the direction of arrow B, sector 35 which is moved upwardly by the rotation of cam 32.
  • FIGURE 9 shows the projection on a plane surface of part of discs 17a, 17b etc. Where, for the sake of clarity, notches 18 are represented by a small rectangle with a dot, while protrusions 19 are simply marked by a rec tangle. By means of this schematic illustration it is easier to understand how the machine members described up to now are operating.
  • shaft 20 and therefore disc 30 moves a certain predetermined angle in the direction of arrow A, in FIGURE 2 consequently to clamp 41 rising and to the lowering according to arrow B of the gear sector 35.
  • sector 35 resumed its highest posi- 6 tion, being thus ready to move or return downwardly at the start of next cycle.
  • the disc '30 is axially moved or slid along the axis of shaft 20 as hereinafter described.
  • shaft 2 On shaft 2 is a fixed cam in contact with a small roller 46 carried on one end of a rod or bar 47 fixed at the other end to a pivot member 48 secured to the base of the casing 1.
  • Rod 47 is pivotally connected by a pivot pin 49 to a lever 50 which has a bent end 51.
  • a gearwheel 52 rotatahly secured by means of small shafts 53 onto the base of casing 1 and moves jointly with cam 54 to which it is secured.
  • Another lever 55 is fulcrumed by means of pivot pin 56 to the casing 1 and has a bent end 57.
  • Both bent parts 51 and 57 are of such a shape as to set in between and engage the teeth of wheel 52 and therefore during every oscillation of rods 47 and 50 due to rotation of cam 45, the bent end 51 drags the wheel 52 in the direction of arrows C in FIGURE 3 for one stroke, while during return of lever 50 the wheel remains clamped in position, this being due to the fact that the other bent end 57 acts as a brake. Therefore during the oscillations of levers 47 and 50 there is a corresponding unidirectional release motion from cam 54.
  • Springs 59 and 60 well placed respectively between the pair of levers 47 and 50 and 47 and 55 ensure the contact between cam 45 and roller 46, as well as between the bent parts 51 and 57 and wheel 52.
  • the lever 61 provided with a stud or stop member 62 in contact with cam 54, is fulcrumed at one end by means of pivot 63 to casing 1. At the other end the lever 61 is provided with pin 64 inserted in groove 65 of pulley 66 which is fixed on shaft 20 and turn jointly with disc 30.
  • Cam 54 has such a profile that for revolution of shaft 2, and therefore for each stroke of the cam 54 in the direction of arrow C, lever 61 and consequently disc 30 move one predetermined space, interval or constant stroke along shaft 20 in the direction of arrow D.
  • cam 69 On shaft 2 is keyed cam 69 in contact with a small roller 70 (FIGURE 2) carried by a lever rectifier element 71 (FIGURE 2) fulcrumed to shaft 9 and fixed at one end to elongated prism 72.
  • lever 71 The other end of lever 71 is connected to spring 73 fixed to casing 1 and which maintains the contact between cam 69 and roller 70,
  • Each fork is part of a corresponding bar 74 ending by an edge formed of two diagonally inclined faces 74 and 74" which come rapidly into contact with faces 72' and 72" of prism 72 in the manner described hereunder (see FIGURES 4 and 5.
  • prism 72 intervenes, by operating on bar or bars 74 corresponding to the finger-keys or the finger-key pressed, and shifting the bar or bars firmly in the lowered position, or back into the resting position.
  • a small hammer will penetrate into a groove formed of discs 17a, 17b etc.
  • each fork 15 and consequently each disc should have a well determined position which is obtained as stated above, by positioning bars 74 up or down, during a cycle of the machine, or duing a revolution of shaft 2. Without this useful arrangement the symbol-holder disc 30 would not acquire an established angular position during the machine cycle. Therefore when the finger-keys are not properly pressed, and all the way down, but in such a way that face 74, as shown in FIGURE 4 corresponding to the keys, goes below prism 72, during the active motion of said prism caused by spring 73, face 72' presses against face 74 in a manner to decidedly lower bar 74 in the direction of arrow E, and accomplishes what the operator by mistake did not do.
  • the arrangement of the symbols on disc 30 can be selected in a manner such that the symbol corresponding to a voluntary slight pressure of any finger-key with the consequent uplifting of bar 74 by means of prism 72, can be one of the letters more commonly used in writing.
  • the disc 30 can present a notch 75, as shown in FIGURE 7 instead of a raised symbol in the tangential position adjacent roller 76 which can correspond to an intentional slight pressure ap plied to the keys as described above, so such notch would serve to create the proper spacing between the written Words.
  • the number of keys selected is five.
  • the possible number of combinations of the five keys, two by two, three by three, four by four, and of the five at the same time is twenty-six. Therefore with five fingerkeys, the number of symbols marked on disc 30 including also notch 75 is thirty-two, which is equal to the total number of finger-keys, added to the number of possible combinations mentioned above, plus one, which corresponds to the slight pressure on any key so as to execute one cycle without having practically any angular shifting of discs 17a, 17b etc. Therefore even the number of hammers 24, 24 etc. around discs 17a, 17b etc. is thirty-two.
  • FIGURE 8 Another embodiment or equivalent solution as shown in FIGURE 8, is applied in the case in which discs 17a, 17b etc. would be moved by the radial levers 16.
  • the hammers 24, 24' etc. ready to enter into the grooves formed of notches of discs 17a, 17b etc. are as many as the symbols of disc 3d, less one.
  • This solution is materialized by lever 77 fulcrumed to casing 1 by means of a stud 78, one end of which terminates the bent part 79 placed under forks 15 while at its other end is fitted lever 80 which has on its end in turn a hammer 81 which can interfere with lever 31.
  • lever 77 operates a spring (not shown in the figure) which tends to push the levers upwardly. Therefore when one or more keys are slightly pressed at the same time and in a manner such that prism 72 lifts bars 74, lever 77 pressed by the spring follows the upward movement of bars 74 and consequently of forks 15 turning around pivot 78.
  • the hammer 81 is thus in such a position as to interfere with lever 31 against which it stops; in fact by this operation, discs 17a, 17b etc. are not shifted by the fingerkeys but only those positioned by the preceding operation return by means of the elastic rods 13 and they are therefore in their single relative position corresponding to the interference of hammer 81 of lever 31.
  • lever 31 may correspond for example the condition for which notch 75 of disc 30 is in contact with the paper roller 76, and in this case with this operation, a spacing would be executed. Therefore hammer 81 is in such a position as to interfere with lever 31 only when all the forks 15 are in the raised position. In this position of forks 15 of discs 17 there exists no continuous groove formed by notches set side by side. Also in this case all the hammers 24, 24', 24", etc. and 81 are equally spaced between them by a certain angle or space equal to that existing between the various symbols of disc 30.
  • Roller 76 (FIGURES 6 and 7) on which is wound up paper 82 is fixed on lever 83 shown in FIGURE 1 and keyed to lever 84 (FIGURE 1), hinged to casing 1 by means of pivot pin 85.
  • Connecting rod 86 (FIGURE 1) is fixed at one end to pivot pin 87 which is fitted in turn to lever 84 and rod 86 is hinged at its other end to lever 86' provided with a bearing roller 88 in contact with cam 89 keyed onto shaft 2.
  • Lever 86' is pivoted on shaft 9 in a manner such that, operated by cam 89, it oscillates around shaft 9 and transmits motion through the connecting rod 86 to lever 84 which thus oscillates around pivot 85.
  • a spring not shown in the figure, causes the paper carrying roller 76 to approach symbol-holder disc 30 and thus the symbol writing, and consequently cam 89 brings the paper carrying roller back to the position away from the symbol-holder disc.
  • Lever 83 is operating jointly to pivot 90 resting on the inclined part 91 of support 92 fixed to casing 1.
  • a second roller 93 on which is wound paper 82.
  • rollers 76 and 93 are respectively the two rollers 94 and 95 connected to casing 1.
  • Paper 82 supplied for instance by a feeder winds up around rollers 94, 76, 93 and 95.
  • roller 96, pressed against roller 95 serves to guarantee the adherence of the paper against roller 95.
  • Cam 89 is timed with respect to the other members of the machine, so that as soon as symbol-holder disc 30 which is positioned both angularly and axially, causes lever 84 to oscillate around stud 85, in shifting the said lever 84 towards disc 30, the unit formed by rollers 76 and 93 participates in this movement, so that the paper approaches and presses against the disc, as illustrated in FIGURE 6.
  • roller 76 again approaches the latter and again causes the paper 82 to shift with respect to the said disc by the same distance as previously, as shown on FIGURE 6. It is, however, understood that disc 30 moves away along shaft 20 of one spacing from sign 98 previously typed, and thus a new sign is impressed next to sign 98, after which, that described above is again repeated. After every line thus written, while stud 62 moves along wall 68, there is a corresponding rapid return of disc 30 in the direction opposite to that indicated by arrow C.
  • roller revolves, by means not described herein, a certain angle, so that a corresponding quantity of paper is caused to be fed outwardly or come forward, an equal distance between the typed lines.
  • the cover shows an opening 101 thereas to make it possible to use the keys with the fingers. Since the fingers of one hand only are preferably used, cover shows next to opening 101, two imprints 102 on which the thumb of either the right or left hand can easily rest.
  • each key has a certain special position so as to suit both the natural shape of the hand and the different length of the fingers; in fact the keys are set side by side in such a way that the centres of the surface of each one of them are on a bent line and are placed, with respect to a horizontal plane, at different heights with the central ones deeper than the lateral ones. It is thus easy to recognize each single key only by touching it, without having to check by sight, and this allows the operator to place the hand correctly.
  • FIGURE 10 are shown the symbols (letters, numbers, etc.) marked on disc 30 and, in correspondence with these, keys 10a, 10b, etc., the dark ones represent the pressed keys and the white ones the keys in stopping position.
  • 25 letters, five numbers and one dash are marked on disc 30.
  • all these symbols are typewritten by pressing each key down all the way either singly or according to combinations, two by two, three by three, four by four and five at the same time, as shown in FIGURE 10.
  • the spacing sign as it has been described above, is obtained by pressing very slightly any key, by itself, or more than one at the same time.
  • a type-writing machine comprising a movable symbol holder means comprising a disc with a plurality of symbols on it for printing an individual symbol on a paper, stopping means for stopping the symbol on the holder means to be printed on the paper at a predetermined position, selector component means for selecting the symbol to be printed, and key means comprising a plurality of finger keys for operating said selector means to select a predetermined symbol and for operating said stopping means to move the symbol holder means to a predetermined position, said stopping means including stopping elements, said holder means comprising a lever which abuts against said elements, rotation means comprising a cam and a gear sector, said cam causing the gear sector to turn in one direction, said sector being pulled in an opposite direction by a spring, a pinion which is geared with said sector being connected to said disc by a unidirectional clutch so as to transmit motion to said disc only when the pinion is driven by said spring.
  • a type-writing machine comprising a movable symbol holder means with a plurality of symbols on it for printing an individual symbol on a paper, stopping means for stopping the symbol on the holder means to be printed on the paper at a predetermined position, selector component means for selecting the symbol to be printed, and key means comprising a plurality of finger keys for operating said selector means to select a predetermined symbol and operating said stopping means to move the symbol holder means to a predetermined position, said selector means comprising disc-shaped elements mounted idly on a shaft with alternating notches and projections on their circumferences disposed so that for operation of a single key and various combinations of keys there is only one series of notches of said disc elements that are in alignment to form a continuous groove, said stopping means including stopping elements engageable in said continuous grooves and said holder means comprising a lever which abuts against said stopping elements, a drive shaft rotated by operation of any of said keys, an oscillating member connected to said drive shaft and caused to oscillate by rotation of said drive shaft
  • a type-writing machine comprising a movable symbol holder means with a plurality of symbols on it for printing an individual symbol on a paper, stopping means for stopping the symbol on the holder means to be printed on the paper at a predetermined position, selector component means for selecting the symbol to be printed, and key means including a plurality of finger keys for operating said selector means to select a predetermined symbol and operating said stopping means to move the symbol holder means to a predetermined position, said selector means comprising disc-shaped elements mounted idly on a shaft with alternating notches and projections on their circumferences and disposed so that for operation of a single key or various combinations thereof, there is only one series of notches of said disc elements that are brought into alignment to form a continuous groove, said stopping means including stopping elements engagable in said continuous grooves, said holder means including a lever which abuts against said stopping elements and also comprising a disc fixed to said shaft, said disc comprising a number of symbols equal to the number of said stopping elements, said symbols being
  • said rectifier element is driven by a cam keyed to said drive shaft and comprises a double-face prism, each face thereof being operatively associated with means which are associated with said disc elements and which cause movement of said disc elements.
  • a type-writing machine comprising amova'ble symbol holder disc with a plurality of symbols circumferentially disposed therein for printing an individual symbol on a paper, said disc being fixedly mounted on a disc holder shaft for rotation therewith, shopping means for stopping the symbol disc at a predetermined position to print a desired symbol on a paper, selector component means for selecting the symbol to be printed, and key means comprising a plurality of finger keys for operating said selector means to select a predetermined symbol and for operating said stopping means to permit movement of the symbol holder disc to a predetermined position, said selector means comprising disc-shaped elements mounted idly on said disc holder shaft with alternating notches and projections on their circumferences disposed so that for operation of any single key or various combinations of keys there is only one series of notches of said disc elements that are in alignment to form a continuous groove, said stopping means including stopping elements equal in number to said symbols and disposed about the circumference of said disc-shaped elements, the angular displacement between respective stopping elements being equal to the ang
  • the type-writing machine of claim 6, including a gearwheel keyed onto said disc holder shaft, said gearwheel having as many teeth as the number of symbols on said symbol disc, a clamp operated by said drive shaft and engageable with the teeth on said gearwheel when said lever is in abutting engagement with a one of said stopping elements, said drive shaft actuating said clamp so as to disengage said clamp from said gearwheel simultaneously with disengagement of said stopping elements from said grooves.
  • each finger key actuates a clutch which connects said drive shaft with a continuously revolving motor-driven wheel so that operation and release of any key causes said clutch to drive said drive shaft for at least one complete revolution of said drive shaft.
  • the machine of claim 9, including a rectifier element driven by said drive shaft which, in reaction to an incomplete operation of a key, causes the disc elements to perform a complete angular movement corresponding to the operated key if said disc elements have at least been caused to move past a certain point by said incomplete operation of a key, said rectifier element causing the disc elements to return to their previous 865,459 9/07 Vidal 197-99 resting position if said disc elements have not been 1,220,844 3/17 Hiltz 197-48 caused to move past said DCtain point by said incomplete 1,832,160 11/31 Vischer 197-48 X operation of a key. 2,375,526 5/45 Colombo 197-11 11.

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US243441A 1961-12-12 1962-12-10 Typewriter comprising improved keyboard and associated printing means Expired - Lifetime US3215246A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3295652A (en) * 1964-03-25 1967-01-03 Oki Electric Ind Co Ltd Type drum selector using sliding plates
US3355001A (en) * 1966-05-16 1967-11-28 Ibm Serial on-the-fly printer using a pair of sequential type member guides
US4831218A (en) * 1984-09-28 1989-05-16 Binagraphics, Inc. Universal binary keyboard system
USD306610S (en) 1985-10-16 1990-03-13 Kabushiki Kaisha Sato Controller for label printing and applying machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1496522A (en) * 1974-01-22 1977-12-30 Endfield C Keyboard

Citations (10)

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Publication number Priority date Publication date Assignee Title
US590207A (en) * 1897-09-21 Type weiting machine
US865459A (en) * 1907-01-24 1907-09-10 Juan Bautista Vidal Keyboard for type-writing and other machines on which a keyboard is used.
US1220844A (en) * 1916-08-31 1917-03-27 Stock Quotation Telegraph Company Type-wheel sleeve for printing-telegraph receivers.
FR610831A (fr) * 1926-02-11 1926-09-14 Machine à écrire
US1832160A (en) * 1930-08-28 1931-11-17 Dow Jones & Company Feeding mechanism for printing telegraphs
US2375526A (en) * 1942-09-16 1945-05-08 Colombo Achille Typewriting machine
US2590421A (en) * 1951-03-20 1952-03-25 Olivetti & Co Spa Printing telegraph apparatus
US2773931A (en) * 1951-07-06 1956-12-11 Kleinschmidt Lab Inc Printing telegraph apparatus
US2897941A (en) * 1957-11-12 1959-08-04 Ibm Type bar trip mechanism
US2926216A (en) * 1956-10-26 1960-02-23 Arthur D Alexander Multiple pulse communication system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US590207A (en) * 1897-09-21 Type weiting machine
US865459A (en) * 1907-01-24 1907-09-10 Juan Bautista Vidal Keyboard for type-writing and other machines on which a keyboard is used.
US1220844A (en) * 1916-08-31 1917-03-27 Stock Quotation Telegraph Company Type-wheel sleeve for printing-telegraph receivers.
FR610831A (fr) * 1926-02-11 1926-09-14 Machine à écrire
US1832160A (en) * 1930-08-28 1931-11-17 Dow Jones & Company Feeding mechanism for printing telegraphs
US2375526A (en) * 1942-09-16 1945-05-08 Colombo Achille Typewriting machine
US2590421A (en) * 1951-03-20 1952-03-25 Olivetti & Co Spa Printing telegraph apparatus
US2773931A (en) * 1951-07-06 1956-12-11 Kleinschmidt Lab Inc Printing telegraph apparatus
US2926216A (en) * 1956-10-26 1960-02-23 Arthur D Alexander Multiple pulse communication system
US2897941A (en) * 1957-11-12 1959-08-04 Ibm Type bar trip mechanism

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3295652A (en) * 1964-03-25 1967-01-03 Oki Electric Ind Co Ltd Type drum selector using sliding plates
US3355001A (en) * 1966-05-16 1967-11-28 Ibm Serial on-the-fly printer using a pair of sequential type member guides
US4831218A (en) * 1984-09-28 1989-05-16 Binagraphics, Inc. Universal binary keyboard system
USD306610S (en) 1985-10-16 1990-03-13 Kabushiki Kaisha Sato Controller for label printing and applying machine

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DE1411810B2 (de) 1971-04-01
GB1015466A (en) 1965-12-31
CH393373A (it) 1965-06-15
DE1411810A1 (de) 1969-02-06

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