GB617878A - Improvements in and relating to capacitor discharge and like circuits - Google Patents

Improvements in and relating to capacitor discharge and like circuits

Info

Publication number
GB617878A
GB617878A GB24821/45A GB2482145A GB617878A GB 617878 A GB617878 A GB 617878A GB 24821/45 A GB24821/45 A GB 24821/45A GB 2482145 A GB2482145 A GB 2482145A GB 617878 A GB617878 A GB 617878A
Authority
GB
United Kingdom
Prior art keywords
capacitor
sept
cathode
charged
discharged
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
GB24821/45A
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 GB617878A publication Critical patent/GB617878A/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
    • H03K4/12—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 voltage is produced across a capacitor
    • 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
    • H04N3/30—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical otherwise than with constant velocity or otherwise than in pattern formed by unidirectional, straight, substantially horizontal or vertical lines
    • H04N3/34—Elemental scanning area oscillated rapidly in direction transverse to main scanning direction

Landscapes

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

Abstract

617,878. Cathode-ray oscillographs. PHILCO RADIO & TELEVISION CORPORATION. Sept. 25, 1945, No. 24821. Convention date, Sept. 27, 1944. Drawings to Specification. [Class 37] [Also in Group XL (c)] Each pair of the deflecting plates of a cathode-ray tube having a radial scan is energized from a capacitor circuit, the capacitor being charged or discharged to restore the capacitor to a normal level by a triggering potential applied to a valve. The capacitor is charged (or discharged) from an A.C. source of frequency low compared with the repetition frequency of the triggering signal so that a number of sawtooth waves are generated during each half-cycle. The A.C. sources for the time base generators are arranged to be in quadrature, Figs. 3 and 4 (not shown). The circuit may employ a screen grid valve operating as a dynatron (see Group XI (c)).
GB24821/45A 1944-09-27 1945-09-25 Improvements in and relating to capacitor discharge and like circuits Expired GB617878A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US556049A US2444330A (en) 1944-09-27 1944-09-27 Saw-tooth wave generator

Publications (1)

Publication Number Publication Date
GB617878A true GB617878A (en) 1949-02-14

Family

ID=24219685

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24821/45A Expired GB617878A (en) 1944-09-27 1945-09-25 Improvements in and relating to capacitor discharge and like circuits

Country Status (2)

Country Link
US (1) US2444330A (en)
GB (1) GB617878A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646565A (en) * 1945-09-18 1953-07-21 Us Navy Cathode-ray tube sweep circuit

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL42984C (en) *
US1387984A (en) * 1915-08-30 1921-08-16 Gen Electric Negative resistance
US2246918A (en) * 1931-09-26 1941-06-24 Westinghouse Electric & Mfg Co Unidirectional scanning
US2093781A (en) * 1931-11-24 1937-09-21 Rca Corp Oscillation circuit
GB457886A (en) * 1936-04-08 1936-12-08 Baird Television Ltd Improvements in or relating to thermionic valve and the like circuits
US2179105A (en) * 1937-06-25 1939-11-07 Rca Corp Current impulse generating circuit
US2287540A (en) * 1940-08-12 1942-06-23 Clayton Mark & Company Surface welding
US2312761A (en) * 1940-09-26 1943-03-02 Rca Corp Sweep circuit generator for cathode ray tubes
US2287543A (en) * 1940-12-18 1942-06-23 Clayton Mark & Company Welding method and apparatus
US2313966A (en) * 1941-03-31 1943-03-16 Rca Corp Cathode ray tube system
US2306230A (en) * 1942-03-30 1942-12-22 Gen Electric Electric valve translating system
US2403716A (en) * 1944-02-07 1946-07-09 Stromberg Carlson Co Combined amplifier and power supply circuit

Also Published As

Publication number Publication date
US2444330A (en) 1948-06-29

Similar Documents

Publication Publication Date Title
US2425600A (en) Pulse relay testing system
GB635073A (en) Improvements in or relating to radar systems
GB546507A (en) Cathode ray tube circuits
US2426721A (en) Stroboscopic cathode-ray oscilloscope system for comparing two frequencies
GB663307A (en) A cathode ray deflection system
GB617878A (en) Improvements in and relating to capacitor discharge and like circuits
US2688697A (en) Pulse stretcher circuit
US2627576A (en) Saw-tooth wave generator
US2118352A (en) Periodic voltage generator
GB577278A (en) Improvements in or relating to electron discharge apparatus for operation at ultra-high frequencies
GB672979A (en) Improvements in mixing or detector circuits incorporating cathode ray tubes
US2266047A (en) Electrical oscillators and time base circuits
US2177162A (en) Periodic saw tooth wave repeater
GB442740A (en) Relaxation oscillation generator
GB830085A (en) Improvements in or relating to circuit arrangements for charging and discharging a capacitor
GB822554A (en) Improvements relating to electronic circuit arrangements
US2562889A (en) Frequency divider
GB659799A (en) Improvements in or relating to pulse-operated thermionic valve apparatus, such as for example, frequency dividers, electrical counters and the like
GB661563A (en) Improvements in or relating to circuits for generating sawtooth waveforms
US2639402A (en) Sweep circuit
GB656114A (en) Electrical generating apparatus
GB620585A (en) Improvements in and relating to selection arrangements for electrical pulse systems
GB535905A (en) Improvements in or relating to time base circuits for television receivers
GB666813A (en) Improvements in or relating to generators of high frequency electrical signals of rectangular waveform
GB784935A (en) Improvements relating to safety circuits for cathode ray tubes