GB493279A - Improvements in or relating to television and like systems - Google Patents

Improvements in or relating to television and like systems

Info

Publication number
GB493279A
GB493279A GB500037A GB500037A GB493279A GB 493279 A GB493279 A GB 493279A GB 500037 A GB500037 A GB 500037A GB 500037 A GB500037 A GB 500037A GB 493279 A GB493279 A GB 493279A
Authority
GB
United Kingdom
Prior art keywords
valve
pulse
picture
circuit
television
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
GB500037A
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.)
THOMAS CAYTON NUTTALL
Baird Television Ltd
Original Assignee
THOMAS CAYTON NUTTALL
Baird Television 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 THOMAS CAYTON NUTTALL, Baird Television Ltd filed Critical THOMAS CAYTON NUTTALL
Priority to GB500037A priority Critical patent/GB493279A/en
Publication of GB493279A publication Critical patent/GB493279A/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
    • H04N5/06—Generation of synchronising signals
    • H04N5/067—Arrangements or circuits at the transmitter end
    • H04N5/0675—Arrangements or circuits at the transmitter end for mixing the synchronising signals with the picture signal or mutually

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

493,279. Television transmitters; valve circuits. BAIRD TELEVISION, Ltd., and NUTTALL, T. C. Jan. 20, 1938, No. 5000. [Classes 40 (iii) and 40 (v)] Synchronizing pulses are inserted in picture signals by a circuit comprising a valve 1 amplifying the picture signals and a secondary emitting valve 12 fed with a constant or slowly varying voltage on its grid, both valves being rendered nonconducting by a pulse from a source 10 applied across the common cathode resistance 11, and the anode current of valve 1 being combined with the current in the secondary emitting electrode circuit of valve 12. As the result of the secondary emission, the two currents are out of phase, so that the gap produced in the picture signals is precisely filled by an inverse pulse of predetermined amplitude. The circuit may also be used to mask out part of the picture and the inserted pulse may have an amplitude dependent on the picture signal amplitude to reinsert direct current components.
GB500037A 1938-01-20 1938-01-20 Improvements in or relating to television and like systems Expired GB493279A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB500037A GB493279A (en) 1938-01-20 1938-01-20 Improvements in or relating to television and like systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB500037A GB493279A (en) 1938-01-20 1938-01-20 Improvements in or relating to television and like systems

Publications (1)

Publication Number Publication Date
GB493279A true GB493279A (en) 1938-10-06

Family

ID=9787831

Family Applications (1)

Application Number Title Priority Date Filing Date
GB500037A Expired GB493279A (en) 1938-01-20 1938-01-20 Improvements in or relating to television and like systems

Country Status (1)

Country Link
GB (1) GB493279A (en)

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