US3822774A - Type holder positioning device for teletypewriter or the like - Google Patents

Type holder positioning device for teletypewriter or the like Download PDF

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Publication number
US3822774A
US3822774A US00274974A US27497472A US3822774A US 3822774 A US3822774 A US 3822774A US 00274974 A US00274974 A US 00274974A US 27497472 A US27497472 A US 27497472A US 3822774 A US3822774 A US 3822774A
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United States
Prior art keywords
shaft
character
holder element
holder
type
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Expired - Lifetime
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US00274974A
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English (en)
Inventor
G Bucksey
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Alcatel Lucent NV
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International Standard Electric Corp
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Assigned to ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTERDAM, THE NETHERLANDS, A CORP OF THE NETHERLANDS reassignment ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTERDAM, THE NETHERLANDS, A CORP OF THE NETHERLANDS ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE
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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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/18—Mechanisms for rendering the print visible to the operator

Definitions

  • Cited latch work in concert from present and future space information to control the position of the shaft and UNITED STATES PATENTS holder. Operation of the operator and latch also re- 3,l68,l Bernard et al. prises equipment wean 3,200,928 8/1965 Moore 197/55 3,377,622 4/1968 Burch, Jr. et a1. 101/93 C X 2 Claims, 6 Drawing Figures PATENTEUJUL 91914 3,822,774
  • This invention relates to teletypewriters and, more particularly, to a type holder control therefor.
  • Another feature of the invention resides in the use of a rod between two flanges on the holder shaft to move the holder between printing and standby positions.
  • FIG. 1 is a diagrammatic view of a portion of a conventional teletypewriter system
  • FIG. 2 is a perspective view of a modification of a portion of the system of a FIG. 1;
  • FIG. 3 is a block diagram including circuits which may be employed in accordance with the present invention.
  • FIG. 4 is a block diagram of portions of the blocks shown in FIG. 3;
  • FIG. 5 is a schematic diagram of a circuit constructed in accordance with the present invention.
  • FIG. 6 is a diagrammatic view of a teletypewriter type wheel position control constructed in accordance with the present invention DESCRIPTION OF THE PREFERRED EMBODIMENT
  • a teletypewriter system including a base 10 on which a platen element or platen 11 is rotatably mounted. Paper is advanced vertically on the platen 11 in the position as indicated at 12. A mechanism 13 is provided to rotate the platen II.
  • a type wheel is provided at 14 having different types 15 fixed relative thereto.
  • Type wheel 14 is fixed to a shaft 16 which is rocked about the axis of a shaft 17 to cause a type 15 to engage paper 12.
  • paper 12 may be conventional inked paper.
  • the particular type 15 selected may be so selected by rotation of wheel 14.
  • a mechanism 18 controls the aforementioned rocking action of shaft 16 and the rotation thereof.
  • Shaft 16 is also moved by mechanism 18 in the direction of the axis of shaft 17 to create a line of type.
  • the system of FIG. 1 may receive binary coded characters in serial form on an input lead 19 which are impressed upon an input circuit 20.
  • a paper advance circuit 21 is connected from input circuit to mechanism 13 to control the position of platen 11.
  • a carriage position selection circuit 22 is connected from input circuit 20 to mechanism 18 to control the position of shaft 16 along the axis of shaft 17.
  • a character selection and impression circuit 23 is connected from input circuit 20 to control the character selected and the impact of the corresponding type on paper 12 against platen 11.
  • FIG. 2 a shaft 24 is connected from mechanism 18.
  • Shaft 24 may be identical to shaft 16.
  • shaft 24 has a splined bore at its upper end and open thereat to receive a corresponding splined shaft 25.
  • a type wheel 26, which also may be described as a type holder element, is fixed to shaft 25.
  • Flanges 27 and 28 are also fixed relative to shaft 25.
  • a member or rod 29 fits between flanges 27 and 28.
  • Shaft 29 is press fit through L-shaped links 30 and 31 that are rotatably mounted from brackets 32 and 33, respectively. Brackets 32 and 33 have their lower ends fixed to mechanism 18.
  • the incoming pulses arrive on an input lead connected from a pulse source 34 to a character register 35, and are entered in serial fashion in the character register 35. After a suitable time delay, they are entered in a storage register 36 via a logic circuit 37. The output of the storage register 36 is employed in controlling the teletypewriter.
  • logic circuit 37 includes, for example, two AND gates for each flip flop in register 36. Two such AND gates are indicated at 38 and 39 in F IG. 4.
  • One flip flop is provided in register 36 for each flip flop in register 35.
  • a flip flop 40 indicated in FIG. 4 is one flip flop in register 36.
  • the corresponding flip flop in register 35 will have a 1 output connected to an input lead 41 to AND gate 38.
  • the same flip flop in register 35 will have its 0 output connected to an input lead 42 to AND gate 39.
  • a transfer pulse is impressed upon the lead 43. The transfer pulse may be the first pulse in each word series which also resets all the flip flops in register 35 to 0.
  • Register 35 has an input lead 35 and includes a space bit 44 and an entered bit 45.
  • Register 36 includes a space bit 46.
  • differentiators 47, 48 and 49 are also shown in FIG. 5. All of these differentiators may be identical if desired. However, as shown, differentiator 48 has a diode 50 which is poled in a direction opposite the direction in which the diodes are poled in differentiators 47 and 49.
  • Differentiator 47 includes a capacitor 51 connected from the 1 output of flip flop 45 to a junction 52.
  • Junction 52 is connected to a junction 53.
  • Junction 53 is connected to the input of a one-shot multivibrator 54.
  • a diode 55 is connected in parallel with a resistor 56 between junction 53 and a junction 57, being grounded.
  • the 0 output of one-shot 54 is connected to the input of the differentiator 48.
  • the output of differentiator 48 is connected to an inverter 58.
  • the output of invertor S8 is connected to a junction 59.
  • the input to differentiator 49 is connected from the 1 output of flip flop 44.
  • the output of differentiator 49 is connected to a one-shot multivibrator 60.
  • Windings 61 and 62 of solenoid operators, to be disclosed, are also shown in FIG. 5.
  • An AND gate 63 has one input connected from junction 59.
  • AND gate 63 has a second input connected from the output of flip flop 44.
  • AND gate 63 has a third input connected from I output of flip flop 46.
  • the output of AND gate 63 operates a switch 64 which may be a conventional electromagnetic or electronic switch, as desired.
  • a source of potential 65 is connected through switch 64 to winding 61.
  • AND gate 66 receives 1 input from junction 59 and another input from the output of one-shot 60.
  • the output of AND gate 66 is employed to operate a switch 67 which may be identical to switch 64, if desired.
  • a source of potential 68 is connected to winding 62 through switch 67.
  • type wheel 26 has types 69 thereon.
  • Link 30 is shown in a slightly different form having three legs 70, 71 and 72.
  • Link 30 is rotatable about the axis of a pin 73.
  • a solenoid operator 74 is actuable by energization of winding 61. This moves a plunger 75 to the right, as viewed in FIG. 6.
  • Plunger 75 then engages the lower end of leg 71 and rotates link 30 about the axis of pin 73 in a counter-clockwise direction. Because type wheel 26 is shown in the up position in FIG. 6, and both windings 61 and 62 are shown de-energized, the right end of plunger 75 is then spaced from leg 71 as shown.
  • latch means including an arm 76 lies in engagement with a stop 77 and is held there by a spring 78, arm 76 being pivoted about a shaft 79.
  • Link 30 thus cannot rotate in a clockwise direction with the parts in the positions shown in FIG. 6. Specifically, the lower end of arm 76 engages the upper end of leg 72.
  • Arm 76 has a ferromagnetic armature 80 fixed thereto in alignment with a ferromagnetic core 80 of winding 62.
  • windings 61 and 62 are not energized simultaneously. From the position shown in FIG. 6, if it is desirable to allow type wheel 26 to rest in its lower or standby position, winding 62 is energized. Link 30 then rotates in a clockwise direction. Type wheel 26 may thus be lowered by force of gravity.
  • windings 61 and 62 need be energized only momentarily.
  • type wheel 26 When type wheel 26 is in its upper position, it is in the position to type. In its lower position, type wheel 26 is in a standby position.
  • type wheel 26 When in the standby position, type wheel 26 may be raised by energizing winding 61.
  • storage register 36 contains the character code which is acted upon by the teletypewriter.
  • Character register 35 thus contains the code which succeeds the code in storage register 36.
  • Differentiator 47 produces a positive output pulse when flip flop 45 is set to the I state.
  • One-shot 54 produces a negative pulse after a time delay which is differentiated by difierentiator 48 and inverted by inverter 58.
  • AND gate 63 is such that when flip flop 44 has a high 0 output, it indicates that there is a character to be typed in rather than the next space left blank. When the 1 output of flip flop 46 is high this indicates that no character should be typed in the current space. Winding 61 is energized during the output pulse of inverter 58.
  • AND gate 66 is such that when the next word shows a space (the l output of flip flop 44 is high), switch 67 is closed by the pulse output of inverter 58 and winding 62 is energized.
  • second means may include solenoid operator 74 shown in FIG. 6.
  • third means may include storage register 36 shown in FIG. 3.
  • phrase fourth means may include character register 35 shown in FIG. 3.
  • phrase fifth means may include apparatus connected from character register 35 and storage register 36 to energize winding 61 in FIGS. 5 and 6.
  • sixth means may include apparatus connected from character register 35 to energize winding 62 in FIGS. 5 and 6.
  • a teletypewriter or the like comprising: a base; a type holder element having an external cylindrical surface; a plurality of different types fixed to the cylindrical external surface of said holder element in positions extending circumferentially therearound; a platen element mounted on said base to carry paper, said holder element being rotatable to select one type for engagement with paper on said platen element, one of said elements being movable horizontally so that a line of characters may be typed on the paper in succession; a shaft having a vertical axis; first means mounted on said base to support said shaft, said holder element being fixed relative to said shaft in a position such that said holder element cylindrical surface is concentric with said shaft axis; a member mounted for guided movement on said first means, said member being movable from a first position to a second position in a manner to engage said holder element and to move the same to an upper printing position, said member being constructed and mounted to move from said second position to said first position thereof, said holder element falling to a lower

Landscapes

  • Character Spaces And Line Spaces In Printers (AREA)
  • Rotary Presses (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Soil Working Implements (AREA)
US00274974A 1971-07-29 1972-07-25 Type holder positioning device for teletypewriter or the like Expired - Lifetime US3822774A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3564571 1971-07-29

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US3822774A true US3822774A (en) 1974-07-09

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US00274974A Expired - Lifetime US3822774A (en) 1971-07-29 1972-07-25 Type holder positioning device for teletypewriter or the like

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US (1) US3822774A (enrdf_load_stackoverflow)
DE (1) DE2236731A1 (enrdf_load_stackoverflow)
ES (1) ES405330A1 (enrdf_load_stackoverflow)
FR (1) FR2147695A5 (enrdf_load_stackoverflow)
GB (1) GB1288537A (enrdf_load_stackoverflow)
IT (1) IT962962B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4551033A (en) * 1980-09-05 1985-11-05 Alps Electric Co., Ltd. Serial electric printer using single unidirectional motor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3168182A (en) * 1963-03-21 1965-02-02 David W Bernard Type wheel shifting and impacting means in high speed printers
US3200928A (en) * 1962-04-18 1965-08-17 Creed & Co Ltd Projecting teleprinter with platen movable into and out of projection field
US3377622A (en) * 1965-04-20 1968-04-09 Gen Electric High speed printer system including recirculating data and address registers
US3400798A (en) * 1967-08-21 1968-09-10 Friden Inc Last character visibility mechanism for a matrix page printer
US3426880A (en) * 1967-04-14 1969-02-11 Friden Inc Serial character matrix page printer
US3517124A (en) * 1967-02-27 1970-06-23 Siemens Ag Device for adjusting a type carrier in teletype or data teletype machines
US3555183A (en) * 1968-08-20 1971-01-12 Mohawk Data Sciences Corp Asynchronous master-slave print system employing charging and discharging of a capacitor
US3605978A (en) * 1970-02-25 1971-09-20 Kurosawa Telecommunications Type-selecting mechanism providing visibility of printed characters during function operations

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200928A (en) * 1962-04-18 1965-08-17 Creed & Co Ltd Projecting teleprinter with platen movable into and out of projection field
US3168182A (en) * 1963-03-21 1965-02-02 David W Bernard Type wheel shifting and impacting means in high speed printers
US3377622A (en) * 1965-04-20 1968-04-09 Gen Electric High speed printer system including recirculating data and address registers
US3517124A (en) * 1967-02-27 1970-06-23 Siemens Ag Device for adjusting a type carrier in teletype or data teletype machines
US3426880A (en) * 1967-04-14 1969-02-11 Friden Inc Serial character matrix page printer
US3400798A (en) * 1967-08-21 1968-09-10 Friden Inc Last character visibility mechanism for a matrix page printer
US3555183A (en) * 1968-08-20 1971-01-12 Mohawk Data Sciences Corp Asynchronous master-slave print system employing charging and discharging of a capacitor
US3605978A (en) * 1970-02-25 1971-09-20 Kurosawa Telecommunications Type-selecting mechanism providing visibility of printed characters during function operations

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4551033A (en) * 1980-09-05 1985-11-05 Alps Electric Co., Ltd. Serial electric printer using single unidirectional motor

Also Published As

Publication number Publication date
FR2147695A5 (enrdf_load_stackoverflow) 1973-03-09
DE2236731A1 (de) 1973-03-08
IT962962B (it) 1973-12-31
GB1288537A (enrdf_load_stackoverflow) 1972-09-13
ES405330A1 (es) 1975-07-01

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AS Assignment

Owner name: ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE;REEL/FRAME:004718/0023

Effective date: 19870311