GB461273A - Improvements in or relating to television or like systems - Google Patents

Improvements in or relating to television or like systems

Info

Publication number
GB461273A
GB461273A GB2290235A GB2290235A GB461273A GB 461273 A GB461273 A GB 461273A GB 2290235 A GB2290235 A GB 2290235A GB 2290235 A GB2290235 A GB 2290235A GB 461273 A GB461273 A GB 461273A
Authority
GB
United Kingdom
Prior art keywords
valves
television
wave
potential
impulses
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
GB2290235A
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.)
DAVID MALCOLM JOHNSTONE
Baird Television Ltd
Original Assignee
DAVID MALCOLM JOHNSTONE
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 DAVID MALCOLM JOHNSTONE, Baird Television Ltd filed Critical DAVID MALCOLM JOHNSTONE
Priority to GB2290235A priority Critical patent/GB461273A/en
Priority to DEF81610D priority patent/DE721055C/en
Publication of GB461273A publication Critical patent/GB461273A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Circuits (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

461,273. Television. JOHNSTONE, D. M., and BAIRD TELEVISION, Ltd. Aug. 14, 1935, No. 22902. [Classes 40 (iii) and 40 (v)] To produce trains of synchronizing impulses, an alternating potential is applied in phase opposition to a pair of valves 1, 2, which are so controlled that only one operates during one train of impulses, but each in turn operates during successive trains, and the outputs are combined. The valves are rendered normally inoperative by a negative grid bias 4 and alternatively operative by a square-wave potential of such value as to overcome partially the negative bias on alternate valves during successive half cycles. The wave length of the square wave is exactly an even integral multiple of that of the sinusoidal alternating potential. The input circuits of the valves are in push-pull, and the valves have a common anode resistance 5. Specification 437,339 is referred to.
GB2290235A 1935-08-14 1935-08-14 Improvements in or relating to television or like systems Expired GB461273A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2290235A GB461273A (en) 1935-08-14 1935-08-14 Improvements in or relating to television or like systems
DEF81610D DE721055C (en) 1935-08-14 1936-08-15 Arrangement for generating mutually shifted pulse trains

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2290235A GB461273A (en) 1935-08-14 1935-08-14 Improvements in or relating to television or like systems

Publications (1)

Publication Number Publication Date
GB461273A true GB461273A (en) 1937-02-15

Family

ID=10186904

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2290235A Expired GB461273A (en) 1935-08-14 1935-08-14 Improvements in or relating to television or like systems

Country Status (2)

Country Link
DE (1) DE721055C (en)
GB (1) GB461273A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1140971B (en) * 1961-01-19 1962-12-13 Philips Nv Circuit for generating two identical meander-shaped pulse trains phase-shifted by 180íÒ

Also Published As

Publication number Publication date
DE721055C (en) 1942-05-22

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