US3200928A - Projecting teleprinter with platen movable into and out of projection field - Google Patents

Projecting teleprinter with platen movable into and out of projection field Download PDF

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Publication number
US3200928A
US3200928A US269348A US26934863A US3200928A US 3200928 A US3200928 A US 3200928A US 269348 A US269348 A US 269348A US 26934863 A US26934863 A US 26934863A US 3200928 A US3200928 A US 3200928A
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US
United States
Prior art keywords
printing
carriage
platen
bar
typehead
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US269348A
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English (en)
Inventor
Moore Frank Arthur
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Creed and Co Ltd
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Creed and Co Ltd
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Filing date
Publication date
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41B—MACHINES OR ACCESSORIES FOR MAKING, SETTING, OR DISTRIBUTING TYPE; TYPE; PHOTOGRAPHIC OR PHOTOELECTRIC COMPOSING DEVICES
    • B41B21/00—Common details of photographic composing machines of the kinds covered in groups B41B17/00 and B41B19/00
    • B41B21/32—Film carriers; Film-conveying or positioning devices
    • B41B21/34—Film carriers; Film-conveying or positioning devices with positioning mechanisms
    • 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
    • B41J29/19—Mechanisms for rendering the print visible to the operator with reflectors or illuminating devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
    • H04L13/18—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00 of receivers
    • H04L13/182—Printing mechanisms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
    • H04L13/18—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00 of receivers
    • H04L13/188—Projection of the printed matter

Definitions

  • an improved form of printing platen in which the platen is moved into the path of the typeprinting head to a printing position just before a printing operation is to take place and retracted from that position to a rest position after the printing operation, at which time a character so printed, together with other of a line or lines of print may be projected onto a screen without obstruction of the image by the platen.
  • the rapidity with which characters are printed and with which the platen is moved into and out of the path of the typehead is such that the printed text appears visible to the eye throughout printing operations.
  • typeprinting apparatus including a typehead mounted on a carriage, means for rocking said carriage and typehead towards a printing medium to print a character thereon and for rocking said carriage and typehead away from the printing medium after printing of the character, a platen bar, and means for moving the platen bar from a rest position to a printing position in which it supports said medium prior to and during a printing operation, and for retracting said platen bar from said printing position to said rest position after said printing operation has been effected.
  • typeprinting apparatus including a type head mounted on a carriage, means for rocking said carriage and typehead towards a printing medium to print a character thereon and for rocking said carriage and typehead away from the said printing medium after printing of the character, a platen bar arranged for movement between a rest position and a printing position which movement is in a direction at a right angle to a line of print on said medium, and means for moving said platen bar to said printing position in which it extends parallel to the line of print and supports said medium prior to and during a printing operation and for retracting said platen bar from the printing position to the rest position after said printing operation has been effected.
  • FIG. 1 shows a pictorial view of an embodiment of the invention
  • FIG. 2 shows an end elevation of the embodiment of FIG. 1, together with an optical arrangement for projecting printing characters onto a screen in an enlarged form.
  • FIG. 1 shows a pictorial view of part of a teleprinter of a well-known type in which a typeprinting head 1 on a carriage 2, is rocked about the axis of a shaft 3, in a direction indicated by the arrow A from a rest position to a printing position.
  • the carriage 2, with printing head 1 thereon, is movable in the direction indicated by the arrow B to effect letterfeed steps in that direction.
  • a guide roller 5, formed by a conventional roller-type printing platen, is carried on a rotatable shaft 6 between support 3,25%,928 Patented Aug. 1?, 1965 members 7 of the apparatus frame.
  • the medium is of translucent material through which light. may be projected in a manner later to be described.
  • the axis Y-Y about which the roller 5 normally rotates serves as an axis for a platen bar 8 which is affixed at its ends to arms 9.
  • the arms 9 are pivotally mounted in pins such as 19, affixed to support members 7, and urged anticlockwise about the axis of pins 10 by tension springs such as 11.
  • the tension springs 11 are afiixed at their ends to support members 7 and arms 9 by pins such as 12 afiixed the the members.
  • Each arm a carries a trunnion block such as 13, pivotally affixed thereto, each trunnion block being engaged by a cranked men er, such as 14, pivotally mounted on the support members 'i by a pin, such as 15.
  • the lower extensions, such as 15, of the cranked members 14 each carry a pin, such as 17, on which there is pivotally mounted one half of a link member 18 the other half of which is pivotally carriedpby way of an elongated hole 1? therethrough, on the stub end of a bar 21 which is carried by and atiixed to the carriage 2.
  • the halves of the link members 18 are afiixed one to another by screws, such as 21 which extend through elongated slots (not shown) in the left-hand halves of the link members into tapped holes in the right-hand halves.
  • This division of the link members 13 into two halves, is to permit adjustment to be made to the length of the link members so that the platen bar 8 is in a printing position to support the medium for printing thereon just prior to the printing operation being effected.
  • Stops, such as 22, are affixed to support member '7 by way of screws, such as 23. It is the purpose of these stops to prevent the platen bar 8 from moving past the printing position with respect to the printing head 1 during pivoting movement about the axis of pins 11 in an anticlockwise direction.
  • FIG. 2 shows a side elevation of the apparatus and the optical system for projecting the text printed on the translucent medium 4 onto the screen.
  • the optical system comprises a light source 24, a condensing lens assembly 25, a mirror 26, a projector lens assembly 27, a mirror 28, and the screen 29.
  • the arrows D denote the direction of projection of the image of the text printed on the medium 4.
  • the platen bar 8 is in the rest position i.e., the retracted position to which it is moved after printing.
  • the type head 1 is moved upward in the direction indicated by the arrow from the position shown in dotted lines to the position in which it is shown in full lines, and the carriage 2 is rocked about the axis of the shaft 3, in the direction indicated by the arrow A, to move the typehead 1 from the rest position to the printing position.
  • this figure shows the platen bar 8 in the printing position at the end of its pivoting movement.
  • the pivoting movement of the bar is arrested through engagement of the ends of the upper limbs of the cranked members 14 with stops 22.
  • the type head 1 has not yet completed its full pivoting movement in the anti-clockwise direction, and continues to pivot with the stub ends of the bar 20 moving in the elongated slots in link members 18. Movement of the carriage 2 terminates when the character on the typehead ll selected for printing, has effected a printing operation by striking the medium 4 at the required character position thereon.
  • the platen bar 8 is in a printing position it is directly behind the printing medium 4, and supports the medium as it is struck by the typehead 1.
  • the carriage 2 is rocked about the axis of the shaft 3 in a direction reverse to that indicated by the arrow A, toward the rest position, and the typehead 1 is lowered to occupy the position in which it is shown as a dotted outline (FIG. 2).
  • the stub ends of the bar 20, carried by carriage 2 engage the right-hand ends of elongated slots in the link members 18, the link members move to the right to cause cranked members 14 to pivot about the axis of pins 15 in an anti-clockwise direction.
  • Screws 21 are then loosened and the position of the typehead 1, with respect to the printing position is adjusted so that the typehead reaches the printing position with the required delay after the platen bar 8 has reached that position, screws 21 are then retightened.
  • the apparatus described herein is particularly suitable for the projection of items of news interest as such items are received by the teleprinter, and for further display by a television system, the camera of which is focussed on the apparatus screen.
  • Typeprinting apparatus including a typehead mounted on a carriage, means for rocking said carriage and typehead towards a printing medium to print a character thereon and for rocking said carriage and typehead away from said printing medium after printing of said charactor, a pair of pivots positioned rearwa'rdly of a printing position, a pair of arm members pivotally mounted on said pivots respectively, a platen bar mounted on said arm members for vertical movement, and means for moving said platen bar from a rest position in which said platen bar is retracted below a printing position to said printing position in which it supports said medium prior to and during a printing operation, and for retra-cting said platen bar from said printing position to said rest position after said printing operation has been effected, said platen-bar-moving means being constituted by said carriage, means being provided to interconnect said carriage and said platen bar 50 that said platen bar is moved from said rest position to said printing position as said typehead is rocked with the carriage theretoward and so that said platen is re
  • Typeprinting apparatus comprising a field of view, means including a beam of light passing through said field for projecting an image of said field, a light-permeable printing medium, means for positioning said printing medium in said field in said beam of light, a carriage, a typehead mounted on said carriage, means for mounting said carriage in such a position that said carriage and said typehead are outside of said light beam when in position of rest, and in such a manner that said carriage may be moved to cause said typehead to move into printing engagement with said printing medium within said field, a pair of pivots positioned rearwardly of a printing position, a pair of arm members pivotally mounted on said pivots respectively, a platen bar mounted on said arm members for vertical movement into the path of said light beam at the opposite side of said printing medium from said typehead and to a point cooperating with said typehead to form a backing therefor when said typehead is in printing engagement with said printing medium, means for simultaneously moving said carriage and said platen member to position said platen member is said field in printing position against one side of said printing medium
  • ROBERT E. PULFREY Primary Examiner. EUGENE R. CAPOZIO, Ex'aminer.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Common Mechanisms (AREA)
  • Projection-Type Copiers In General (AREA)
US269348A 1962-04-18 1963-04-01 Projecting teleprinter with platen movable into and out of projection field Expired - Lifetime US3200928A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15071/62A GB934952A (en) 1962-04-18 1962-04-18 Improvements in or relating to typeprinting apparatus

Publications (1)

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US3200928A true US3200928A (en) 1965-08-17

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US269348A Expired - Lifetime US3200928A (en) 1962-04-18 1963-04-01 Projecting teleprinter with platen movable into and out of projection field

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US (1) US3200928A (US20110009641A1-20110113-C00160.png)
BE (1) BE631202A (US20110009641A1-20110113-C00160.png)
DE (1) DE1168474B (US20110009641A1-20110113-C00160.png)
GB (1) GB934952A (US20110009641A1-20110113-C00160.png)
NL (1) NL291673A (US20110009641A1-20110113-C00160.png)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3400798A (en) * 1967-08-21 1968-09-10 Friden Inc Last character visibility mechanism for a matrix page printer
US3710912A (en) * 1969-04-16 1973-01-16 Olivetti & Co Spa High speed serial printing device for typewriters, teleprinters, calculating machines, accounting machines and the like
US3822774A (en) * 1971-07-29 1974-07-09 Int Standard Electric Corp Type holder positioning device for teletypewriter or the like
US3910395A (en) * 1974-03-06 1975-10-07 Ibm Apparatus for print head retraction to facilitate paper insertion
US3923139A (en) * 1972-05-25 1975-12-02 Paul Mesnil Device for acquisition, storage and echelon of characters in a printer of the series type

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US936497A (en) * 1907-10-04 1909-10-12 Howard M Webster Display apparatus.
US1980160A (en) * 1931-03-17 1934-11-13 Western Union Telegraph Co Projector for type bar printers
US2115456A (en) * 1935-11-13 1938-04-26 Addressograph Multigraph Embossing machine
US2252577A (en) * 1938-08-26 1941-08-12 Trans Lux Corp Printer-projection system
US2307433A (en) * 1939-10-21 1943-01-05 Trans Lux Corp Typing-projection system
US2330799A (en) * 1940-07-08 1943-10-05 Coker Score projecting apparatus
US2405168A (en) * 1940-07-17 1946-08-06 Teletype Corp Projector for page printers
DE821944C (de) * 1948-10-02 1951-11-22 Optische Werke C A Steinheil S Einrichtung zum Projizieren maschinengeschriebener Schriftzeichen waehrend des Schreibens

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US936497A (en) * 1907-10-04 1909-10-12 Howard M Webster Display apparatus.
US1980160A (en) * 1931-03-17 1934-11-13 Western Union Telegraph Co Projector for type bar printers
US2115456A (en) * 1935-11-13 1938-04-26 Addressograph Multigraph Embossing machine
US2252577A (en) * 1938-08-26 1941-08-12 Trans Lux Corp Printer-projection system
US2307433A (en) * 1939-10-21 1943-01-05 Trans Lux Corp Typing-projection system
US2330799A (en) * 1940-07-08 1943-10-05 Coker Score projecting apparatus
US2405168A (en) * 1940-07-17 1946-08-06 Teletype Corp Projector for page printers
DE821944C (de) * 1948-10-02 1951-11-22 Optische Werke C A Steinheil S Einrichtung zum Projizieren maschinengeschriebener Schriftzeichen waehrend des Schreibens

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3400798A (en) * 1967-08-21 1968-09-10 Friden Inc Last character visibility mechanism for a matrix page printer
US3710912A (en) * 1969-04-16 1973-01-16 Olivetti & Co Spa High speed serial printing device for typewriters, teleprinters, calculating machines, accounting machines and the like
US3822774A (en) * 1971-07-29 1974-07-09 Int Standard Electric Corp Type holder positioning device for teletypewriter or the like
US3923139A (en) * 1972-05-25 1975-12-02 Paul Mesnil Device for acquisition, storage and echelon of characters in a printer of the series type
US3910395A (en) * 1974-03-06 1975-10-07 Ibm Apparatus for print head retraction to facilitate paper insertion

Also Published As

Publication number Publication date
NL291673A (US20110009641A1-20110113-C00160.png)
DE1168474B (de) 1964-04-23
GB934952A (en) 1963-08-21
BE631202A (US20110009641A1-20110113-C00160.png)

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