GB384263A - Improvements in and relating to the transmission of pictures - Google Patents

Improvements in and relating to the transmission of pictures

Info

Publication number
GB384263A
GB384263A GB4879/31A GB487931A GB384263A GB 384263 A GB384263 A GB 384263A GB 4879/31 A GB4879/31 A GB 4879/31A GB 487931 A GB487931 A GB 487931A GB 384263 A GB384263 A GB 384263A
Authority
GB
United Kingdom
Prior art keywords
motor
feb
valve
synchronizing
pictures
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
GB4879/31A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB384263A publication Critical patent/GB384263A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/12—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising
    • H04N5/123—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising whereby the synchronisation signal directly commands a frequency generator

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Telescopes (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

384,263. Maintaining defined speeds of motors. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Rich, T. A.; Mathews 17, Harvard University, Cambridge, Massachusetts, U.S.A.) Feb. 16, 1931, No. 4879. Convention date, Feb. 15, 1930. Void [Published under Sect. 91 of the Acts]. [Class 38 (iii).] Synchronizing impulses received on an aerial 10, separated by a filter 12 and amplified by a valve 15, are applied to an auxiliary field of a motor 16 connected to a scanning-disc 18. An A.C. generator 17 driven by the motor is connected in the plate circuit of the valve so that the speed of the motor varies with changes in the phase relation of the synchronizing and locally generated impulses.
GB4879/31A 1930-02-15 1931-02-16 Improvements in and relating to the transmission of pictures Expired GB384263A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US384263XA 1930-02-15 1930-02-15

Publications (1)

Publication Number Publication Date
GB384263A true GB384263A (en) 1932-12-01

Family

ID=21899880

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4879/31A Expired GB384263A (en) 1930-02-15 1931-02-16 Improvements in and relating to the transmission of pictures

Country Status (2)

Country Link
FR (1) FR714866A (en)
GB (1) GB384263A (en)

Also Published As

Publication number Publication date
FR714866A (en) 1931-11-21

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