GB558927A - Improvements in or relating to television - Google Patents

Improvements in or relating to television

Info

Publication number
GB558927A
GB558927A GB10371/42A GB1037142A GB558927A GB 558927 A GB558927 A GB 558927A GB 10371/42 A GB10371/42 A GB 10371/42A GB 1037142 A GB1037142 A GB 1037142A GB 558927 A GB558927 A GB 558927A
Authority
GB
United Kingdom
Prior art keywords
valve
saw
waves
circuit
hard
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
GB10371/42A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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
Priority to BE479720D priority Critical patent/BE479720A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB10371/42A priority patent/GB558927A/en
Priority to US489884A priority patent/US2433342A/en
Publication of GB558927A publication Critical patent/GB558927A/en
Priority to FR939252D priority patent/FR939252A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/24—Blanking circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/26—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor
    • H03K4/28—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as a switching device
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/26—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor
    • H03K4/28—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as a switching device
    • H03K4/32—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as a switching device combined with means for generating the driving pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)

Abstract

558,927. Television; valve generating circuits. STANDARD TELEPHONES & CABLES, Ltd., CHATTERJEA, P. K., and AMBROSE, D. M. July 24, 1942, No. 10371. [Classes 40 (iii) and 40 (v)] A scanning arrangement for a television cathode-ray tube comprises a generator of sawtooth waves, an inductive circuit L for applying the waves to the electron beam of the tube, and a hard valve V2 normally biased to cut-off and having its anode circuit connected to shunt the inductive circuit, means being provided for unblocking the hard valve only during the periods of the fly-back strokes of the saw-tooth waves. As shown in Fig. 1, the circuit comprising the inductance L and the hard valve V2 is supplied from a generator of saw-tooth waves G through an amplifying valve VI. The saw-tooth waves are also fed through an amplifier V3 and a transformer T to the grid circuit of the hard valve V2, so that this valve is rendered conductive only during the fly-back periods of the saw-tooth waves. During this conductivity serves to damp undesired oscillations in the inductive circuit. Reference is made to Specification 457,929 for similar circuits but using neon or other gas-filled valves in place of the hard valve V2.
GB10371/42A 1942-07-24 1942-07-24 Improvements in or relating to television Expired GB558927A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE479720D BE479720A (en) 1942-07-24
GB10371/42A GB558927A (en) 1942-07-24 1942-07-24 Improvements in or relating to television
US489884A US2433342A (en) 1942-07-24 1943-06-07 Cathode-ray tube sweep circuit
FR939252D FR939252A (en) 1942-07-24 1946-08-28 Improvements to television devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB10371/42A GB558927A (en) 1942-07-24 1942-07-24 Improvements in or relating to television

Publications (1)

Publication Number Publication Date
GB558927A true GB558927A (en) 1944-01-27

Family

ID=9966609

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10371/42A Expired GB558927A (en) 1942-07-24 1942-07-24 Improvements in or relating to television

Country Status (4)

Country Link
US (1) US2433342A (en)
BE (1) BE479720A (en)
FR (1) FR939252A (en)
GB (1) GB558927A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2612633A (en) * 1950-09-13 1952-09-30 Bell Telephone Labor Inc Multiplex converter
US2848557A (en) * 1952-03-22 1958-08-19 Wurlitzer Co Automatic volume level control for phonographs
US2797265A (en) * 1953-03-31 1957-06-25 Rca Corp Pulse amplifier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB457929A (en) * 1935-06-08 1936-12-08 Marconi Wireless Telegraph Co Improvements in or relating to cathode ray tube apparatus
US2315073A (en) * 1941-05-01 1943-03-30 Bell Telephone Labor Inc Electric circuits

Also Published As

Publication number Publication date
US2433342A (en) 1947-12-30
BE479720A (en)
FR939252A (en) 1948-11-09

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