GB452730A - Improvements in or relating to television receiving systems - Google Patents

Improvements in or relating to television receiving systems

Info

Publication number
GB452730A
GB452730A GB654235A GB654235A GB452730A GB 452730 A GB452730 A GB 452730A GB 654235 A GB654235 A GB 654235A GB 654235 A GB654235 A GB 654235A GB 452730 A GB452730 A GB 452730A
Authority
GB
United Kingdom
Prior art keywords
valve
cathode
deflecting
bias
diode
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
GB654235A
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.)
WALTER HENRY STEVENS
AC Cossor Ltd
Original Assignee
WALTER HENRY STEVENS
AC Cossor 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 WALTER HENRY STEVENS, AC Cossor Ltd filed Critical WALTER HENRY STEVENS
Priority to GB654235A priority Critical patent/GB452730A/en
Publication of GB452730A publication Critical patent/GB452730A/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
    • H04N3/20—Prevention of damage to cathode-ray tubes in the event of failure of scanning

Landscapes

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

Abstract

452,730. Television. COSSOR, Ltd., A. C., BEDFORD, L. H., and STEVENS, W. H., Highbury Grove, London. March 1, 1935, No. 6542. [Classes 40 (iii) and 40 (v)] To prevent burning of the fluorescent screen, the cathode-ray current is reduced when the scanning oscillations cease. The deflecting oscillations are applied to C1, Fig. 3, and are rectified by the diode stage of the diode-triode V to apply a prohibitive bias to the triode stage. When the deflecting oscillations cease, this bias is removed and the valve V effectively short-circuits the anode A1 and cathode F of the cathode-ray tube. According to the Provisional Specification, the cessation of the line scanning potentials is utilized to control the framing potential. A valve V5, Fig. 2, supplies charging current to the condenser C5. The line scanning potentials are applied to C1 and rectified by the diode V to supply a cut-off bias to valve V6. When the line deflecting oscillations cease, the valve V6 becomes conducting to discharge the condenser C5.
GB654235A 1935-03-01 1935-03-01 Improvements in or relating to television receiving systems Expired GB452730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB654235A GB452730A (en) 1935-03-01 1935-03-01 Improvements in or relating to television receiving systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB654235A GB452730A (en) 1935-03-01 1935-03-01 Improvements in or relating to television receiving systems

Publications (1)

Publication Number Publication Date
GB452730A true GB452730A (en) 1936-08-28

Family

ID=9816387

Family Applications (1)

Application Number Title Priority Date Filing Date
GB654235A Expired GB452730A (en) 1935-03-01 1935-03-01 Improvements in or relating to television receiving systems

Country Status (1)

Country Link
GB (1) GB452730A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2943233A (en) * 1958-05-26 1960-06-28 Television Utilities Corp Video transducing system employing a flying spot scanner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2943233A (en) * 1958-05-26 1960-06-28 Television Utilities Corp Video transducing system employing a flying spot scanner

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