GB469809A - Improvements in or relating to telegraph keyboard transmitters - Google Patents

Improvements in or relating to telegraph keyboard transmitters

Info

Publication number
GB469809A
GB469809A GB296936A GB296936A GB469809A GB 469809 A GB469809 A GB 469809A GB 296936 A GB296936 A GB 296936A GB 296936 A GB296936 A GB 296936A GB 469809 A GB469809 A GB 469809A
Authority
GB
United Kingdom
Prior art keywords
magnet
key
shaft
detent
drum
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
Application number
GB296936A
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
Priority to GB296936A priority Critical patent/GB469809A/en
Publication of GB469809A publication Critical patent/GB469809A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B68—SADDLERY; UPHOLSTERY
    • B68G—METHODS, EQUIPMENT, OR MACHINES FOR USE IN UPHOLSTERING; UPHOLSTERY NOT OTHERWISE PROVIDED FOR
    • B68G7/00—Making upholstery
    • B68G7/08—Quilting; Elements therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L21/00—Apparatus or local circuits for mosaic printer telegraph systems
    • H04L21/02—Apparatus or local circuits for mosaic printer telegraph systems at the transmitting end

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Catching Or Destruction (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

469,809. Code and facsimile telegraphy. CREED & CO., Ltd., and SALMON, R. D. Jan. 31, 1936, No. 2969. [Class 40 (iii)] A keyboard-controlled photo-electric transmitter for telegraphic code impulses (Morse or multiple-unit) or facsimile telegraphy comprises a drum 36 with rows of apertures or opaque and transparent portions rotatable within a drum 37 having an axial row of holes 38 adapted to be uncovered by shutters 39 controlled by the keys so that a photo-electric cell 35 is activated by a light-source 40 to transmit impulses. The light-source and cell may be transposed, and the light-source may be a mercury - vapour lamp fed with voice-frequency current. The code drum is carried by a shaft 42 which is driven by a spring wound by a constantly driven shaft (not shown) and is normally held by detent 16. When a key is pressed, magnet 17 releases the detent 16 and magnet 32 operates the key-locking bar 53. After the shaft has started, magnet 17 is released at contact disc 33 and, towards the end of one revolution of the shaft, relay 30 pulls up over disc 34 and releases relay 32 and the locking-bar. If a key is held depressed too long, 30 is held over the key contact and prevents re-operation of the detent magnet 17.
GB296936A 1936-01-31 1936-01-31 Improvements in or relating to telegraph keyboard transmitters Expired GB469809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB296936A GB469809A (en) 1936-01-31 1936-01-31 Improvements in or relating to telegraph keyboard transmitters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB296936A GB469809A (en) 1936-01-31 1936-01-31 Improvements in or relating to telegraph keyboard transmitters

Publications (1)

Publication Number Publication Date
GB469809A true GB469809A (en) 1937-08-03

Family

ID=9749431

Family Applications (1)

Application Number Title Priority Date Filing Date
GB296936A Expired GB469809A (en) 1936-01-31 1936-01-31 Improvements in or relating to telegraph keyboard transmitters

Country Status (1)

Country Link
GB (1) GB469809A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2901730A (en) * 1955-08-29 1959-08-25 Ibm Data storage apparatus
US3253087A (en) * 1961-05-02 1966-05-24 Purdy & Mcintosh Electronic De Electrical signal code generating equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2901730A (en) * 1955-08-29 1959-08-25 Ibm Data storage apparatus
US3253087A (en) * 1961-05-02 1966-05-24 Purdy & Mcintosh Electronic De Electrical signal code generating equipment

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