GB477038A - Improvements relating to television and the like - Google Patents

Improvements relating to television and the like

Info

Publication number
GB477038A
GB477038A GB14289/36A GB1428936A GB477038A GB 477038 A GB477038 A GB 477038A GB 14289/36 A GB14289/36 A GB 14289/36A GB 1428936 A GB1428936 A GB 1428936A GB 477038 A GB477038 A GB 477038A
Authority
GB
United Kingdom
Prior art keywords
valve
voltage
television
circuit
resistance
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
GB14289/36A
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.)
Philco Radio and Television Corp
Original Assignee
Philco Radio and Television 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 Philco Radio and Television Corp filed Critical Philco Radio and Television Corp
Publication of GB477038A publication Critical patent/GB477038A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H04N3/20—Prevention of damage to cathode-ray tubes in the event of failure of scanning

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Details Of Television Scanning (AREA)

Abstract

477,038. Television. PHILCO RADIO & TELEVISION CORPORATION. May 20, 1936, No. 14289. Convention date, June 7, 1935. [Class 40 (iii)] A pulse is formed from an input synchronizing signal of one polarity and controls the building up of a voltage of opposite polarity which is combined with the input and then dissipated. The large positive impulse produced by a blocking oscillator V3 on the return stroke is passed through a resistance R3 and a gas-discharge tube RT to a biassing- circuit R, C in the grid circuit of a valve V1. The charge on the condenser C leaks away sufficiently during the scanning of a line to permit the valve to respond to the synchronizing-signal at the end of the line. Specification 468,505 is referred to. The Specification as open to inspection under Sect. 91 comprises also the impulse on the return stroke building up a voltage in a circuit R4, C4 which is applied through a valve V5 to a cathode-ray tube CT. In the absence of this voltage the anode current through a resistance R5 gives rise to a bias sufficient to cut off the cathode ray. This subject-matter does not appear in the Specification as accepted.
GB14289/36A 1935-06-07 1936-05-20 Improvements relating to television and the like Expired GB477038A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US477038XA 1935-06-07 1935-06-07

Publications (1)

Publication Number Publication Date
GB477038A true GB477038A (en) 1937-12-20

Family

ID=21950460

Family Applications (2)

Application Number Title Priority Date Filing Date
GB14289/36A Expired GB477038A (en) 1935-06-07 1936-05-20 Improvements relating to television and the like
GB6930/37A Expired GB477433A (en) 1935-06-07 1936-05-20 Improvements relating to television and the like

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB6930/37A Expired GB477433A (en) 1935-06-07 1936-05-20 Improvements relating to television and the like

Country Status (1)

Country Link
GB (2) GB477038A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470048A (en) * 1946-05-31 1949-05-10 Bendix Aviat Corp Television receiver

Also Published As

Publication number Publication date
GB477433A (en) 1937-12-20

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