US2214938A - Teleprinter receiving apparatus - Google Patents

Teleprinter receiving apparatus Download PDF

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Publication number
US2214938A
US2214938A US237183A US23718338A US2214938A US 2214938 A US2214938 A US 2214938A US 237183 A US237183 A US 237183A US 23718338 A US23718338 A US 23718338A US 2214938 A US2214938 A US 2214938A
Authority
US
United States
Prior art keywords
lever
carriage
teleprinter
function
gear wheel
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
Application number
US237183A
Other languages
English (en)
Inventor
Salmon Reginald Dennis
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
Original Assignee
Creed and Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Creed and Co Ltd filed Critical Creed and Co Ltd
Application granted granted Critical
Publication of US2214938A publication Critical patent/US2214938A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H04L13/186—Page printing; tabulating
    • 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
    • H04L13/02—Details not particular to receiver or transmitter
    • H04L13/06—Tape or page guiding or feeding devices

Definitions

  • This invention relates to teleprinters, in which a movable carriage is moved the space of a printed character after the printing of each charac-' ter. It has for its object to provide a back spacing mechanism of a simple kind and also one which is adapted particularly to power driven apparatus. 1 v
  • the movable carriage is moved in steps through a differential gear mechanism and a function lever for back spacing acts to release a normally stationary part of said differential gear mechanism to move the carriage in the reverse direction for the spaces of one or more characters.
  • the invention will be described as applied to teleprinter apparatus printing in page form in which the movable carriage is moved backwards the space of one character in response to a dis-,
  • teleprinter apparatus chosen for illustration is that described in Specification No. 467,352, in which the movable carriage consists of a movable type basket cooperating with stationary selector members, but it is to be understood that the invention is equally applicable to apparatus in which the printing mechanism is stationary and the paper is moved.
  • Fig. 1 is a vertical cross-section of a portion of a 'teleprinter as shown in Specification No. 467,352, with the invention applied thereto;
  • Fig. 2 is a plan view
  • Fig. 3 is a vertical cross-section on a line at right angles to that of Fig. 1.
  • the movable type basket of a teleprinter is fixed to a rack I driven against the tension of a spring (not shown) by the engagement of the rack I with a toothed wheel 2 mounted on a shaft 3 as described in the above mentioned specification.
  • the shaft 3 is driven through a differential gear mechanism described hereinafter by means of a dog clutch, one part I! of which is secured to a shaft II and the other part I 5 of which is slidably mounted on a sleeve I2 freely rotatable on the shaft I I.
  • Fixed to the sleeve I2 is a gear wheel I3, which meshes with a worm I4 tending'to be rotated through a clutch from a constantly rotating motor driven shaft.
  • the differential gear mechanism consists of a gear wheel 4 fixed to the shaft 3, a gear wheel I fixed to the shaft II, and gear wheels and 9.
  • Gear wheel 5 is mounted in a bracket 6 attached to a disc 1 whilst gear wheel 9 is mounted in a bracket 26 attached to a disc 8.
  • Discs I and 8 are fixed together and mounted to rotate freely in bearings carried by the aligned ends of shafts I I and 3. These discs are furnished with teeth around their peripheries, the teeth on the two discs being staggered, and are held stationary by the engagement therewith of a detent 34.
  • Gear wheel 5 meshes with gear wheel 4 and gear wheel 9 which in turn meshes with gear wheel Ill.
  • a function lever 8! is provided. This lever is selected, by a received combination of impulses,- through the tilting of a particular combination of the vanes 2
  • is pivoted on a rod 82 and urged towards the above mentioned vanes by a spring 83.
  • takes place in a manner similar to that described for other function levers in Specification No. 467,352.
  • a function cam 3i and function bail 21 are provided for this purpose.
  • is mounted on the same shaft as the worm I4 though shown separately in the drawing for the sake of clearness. It is actuated through a clutch separate from the clutch actuating the worm I4.
  • the discs 1 and 8 of the differential gear above referred to are held stationary by the engagement of a forked escapement lever 34 with the teeth on the disc 8. Movement of lever 19 to the right in Fig. 1 moves the forked lever 35 against the spring 35 and allows the discs 1 and 8 to move until the forked lever 34 engages a tooth on the upper disc 1.
  • the carriage of the teleprinter with the rack l is being urged to its initial position and release of the discs I and 8 allows the rack l to rotate the wheel 2 until the carriage has moved back half the space of a character.
  • the lever I9 is free to return to its original position, and the spring 35 is able to restore the forked lever E i to the position shown in the drawing.
  • a machine telegraph comprising a movable carriage means comprising a differential gear mechanism for moving said carriage in one direction on the receipt of certain signals, a spring tending to move said carriage in the opposite direction and means operative upon the receipt of a separate distinctive signal to release for movement a normally stationary member of said differential gear mechanism to permit movement of said carriage by said spring.
  • a machine telegraph comprising a movable carriage, means comprising a differential gear mechanism for moving said carriage in steps in one direction on the receipt of certain signals, said difierential gear mechanism comprsing an escapement disc normally held stationary, an escapement lever co-operating with said disc, 2, spring tending to move said carriage in the opposite direction and means operative upon the receipt of a separate distinctive signal to move said escapement lever to permit limited movement of said disc and so permit limited movement of said carriage by said spring.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmission Devices (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
US237183A 1937-10-29 1938-10-27 Teleprinter receiving apparatus Expired - Lifetime US2214938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB206858X 1937-10-29

Publications (1)

Publication Number Publication Date
US2214938A true US2214938A (en) 1940-09-17

Family

ID=10149975

Family Applications (1)

Application Number Title Priority Date Filing Date
US237183A Expired - Lifetime US2214938A (en) 1937-10-29 1938-10-27 Teleprinter receiving apparatus

Country Status (3)

Country Link
US (1) US2214938A (de)
CH (1) CH206858A (de)
GB (1) GB504740A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2886638A (en) * 1955-10-27 1959-05-12 Teletype Corp Backspace mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2886638A (en) * 1955-10-27 1959-05-12 Teletype Corp Backspace mechanism

Also Published As

Publication number Publication date
GB504740A (en) 1939-05-01
CH206858A (de) 1939-08-31

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