GB500842A - Improvements in television transmitting systems - Google Patents

Improvements in television transmitting systems

Info

Publication number
GB500842A
GB500842A GB12079/38A GB1207938A GB500842A GB 500842 A GB500842 A GB 500842A GB 12079/38 A GB12079/38 A GB 12079/38A GB 1207938 A GB1207938 A GB 1207938A GB 500842 A GB500842 A GB 500842A
Authority
GB
United Kingdom
Prior art keywords
valve
generator
ray tube
cathode ray
signal
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
GB12079/38A
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.)
BAE Systems Aerospace Inc
Original Assignee
Hazeltine Corp
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 Hazeltine Corp filed Critical Hazeltine Corp
Publication of GB500842A publication Critical patent/GB500842A/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
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
    • H04N5/165—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level to maintain the black level constant

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Circuits (AREA)

Abstract

500,842. Television transmitters. HAZELTINE CORPORATION. April 22, 1938, No. 12079. Convention date, May 27, 1937. [Class 40 (iii)] Picture signals are developed in the cathode ray tube 11 without any direct-current components and are applied to the input of valve 29 whose bias is controlled by cell 23, viewing the whole scene, to add the direct current components; pulses from 14 are also applied to the suppressor grid of valve 29 to render it nonconducting during fly-back periods, so that gapped picture signals comprising directcurrent components occur at the output of valve 29. A main generator 20 controls the scanning oscillators 12, 13, the generator 14 and the synchronizing signal generator 17. The impulses from 14 are preferably applied to the control-grid of the cathode ray tube 11 to wipe out the return lines. Synchronizing signals from 17 are added to the signal from valve 29 at 30, the mixed signal then being modulated onto a carrier for transmission. Specification 450,675 is referred to.
GB12079/38A 1937-05-27 1938-04-22 Improvements in television transmitting systems Expired GB500842A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US500842XA 1937-05-27 1937-05-27

Publications (1)

Publication Number Publication Date
GB500842A true GB500842A (en) 1939-02-16

Family

ID=21963291

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12079/38A Expired GB500842A (en) 1937-05-27 1938-04-22 Improvements in television transmitting systems

Country Status (1)

Country Link
GB (1) GB500842A (en)

Similar Documents

Publication Publication Date Title
US2546972A (en) Television synchronizing system
GB531711A (en) Automatic amplification and black level control for television receivers
US2548436A (en) Television receiver background control circuit
US2402091A (en) Television system
GB441761A (en) Improvements in or relating to the method and means for the synchronisation of television receivers by the transmitter
GB500842A (en) Improvements in television transmitting systems
US2289948A (en) Video-frequency signal-translating system for television receivers
GB590778A (en) Signal mixing amplifier
GB515302A (en) Improvements in and relating to television and like systems
US2363800A (en) Television system
US2208374A (en) Television receiving system
USRE25284E (en) D loughlin
GB685483A (en) Improvements in or relating to television apparatus
US2391090A (en) Monitoring device for television systems
GB701985A (en) Improvements in or relating to television receivers
GB842235A (en) Facsimile transmission systems
GB515209A (en) Improvements in or relating to television systems
US2706217A (en) Color television control apparatus
US2249533A (en) Television receiver including black-level control
US2253313A (en) Signal-translating channel
US2929867A (en) Composite signal transmitting systems
GB450303A (en) Improvements in or relating to television or like transmitting installations
GB622210A (en) Improvements in or relating to television transmitting apparatus
US2228725A (en) Signal translating system
GB737212A (en) Apparatus for the transmission and reproduction of color television images