GB700454A - Improvements in thermionic oscillation generators - Google Patents

Improvements in thermionic oscillation generators

Info

Publication number
GB700454A
GB700454A GB2814048A GB2814048A GB700454A GB 700454 A GB700454 A GB 700454A GB 2814048 A GB2814048 A GB 2814048A GB 2814048 A GB2814048 A GB 2814048A GB 700454 A GB700454 A GB 700454A
Authority
GB
United Kingdom
Prior art keywords
valve
resistor
circuit
current
resistors
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
GB2814048A
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.)
HAROLD ALFRED FAIRHURST
Murphy Radio Ltd
Original Assignee
HAROLD ALFRED FAIRHURST
Murphy Radio 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 HAROLD ALFRED FAIRHURST, Murphy Radio Ltd filed Critical HAROLD ALFRED FAIRHURST
Priority to GB2814048A priority Critical patent/GB700454A/en
Publication of GB700454A publication Critical patent/GB700454A/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
    • 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
    • H03K4/34—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 using a single tube with positive feedback through a transformer

Landscapes

  • Television Receiver Circuits (AREA)

Abstract

700,454. Television. MURPHY RADIO, Ltd., and FAIRHURST, H. A. Oct. 28, 1949 [Oct. 29, 1948], No. 28140/48. Class 40 (3). [Also in Group XL(c)] A saw tooth current generator comprising a valve 8, Fig. 6, transformer 9, 10, 13 and resistor 11, (see Group XL (c)), is included in a circuit with the audio output valve 20 in a television receiver. The focusing coils for the receiver are connected in series with the anode circuit of the output valve by the vertical leads shown and focus is maintained with changes in H.T. voltage by applying a voltage obtained from resistors 33, 34 in the screen grid circuit of valve 8 to the control grid of valve 20. Resistors 33, 34 may alternatively be connected across a current dependent resistor connected between resistor 11 and earth. In an alternative circuit, Fig. 5, the output valve 20 and the focusing coil which is connected across resistors 29 and 11 are in series with the screen grid of valve 8. Resistor 29 which may alternatively be connected as shown in dotted lines is in series with the coil and adjusts the focusing current while potentiometer 11 adjusts the frequency of the saw tooth generator. Capacitor 32 frees the focusing coil from the alternating component of the screen grid current. Specifications 643,993 and 700,453, [both in Group XL (c)], are referred to.
GB2814048A 1948-10-29 1948-10-29 Improvements in thermionic oscillation generators Expired GB700454A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2814048A GB700454A (en) 1948-10-29 1948-10-29 Improvements in thermionic oscillation generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2814048A GB700454A (en) 1948-10-29 1948-10-29 Improvements in thermionic oscillation generators

Publications (1)

Publication Number Publication Date
GB700454A true GB700454A (en) 1953-12-02

Family

ID=10270883

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2814048A Expired GB700454A (en) 1948-10-29 1948-10-29 Improvements in thermionic oscillation generators

Country Status (1)

Country Link
GB (1) GB700454A (en)

Similar Documents

Publication Publication Date Title
US2443030A (en) Picture size control circuit for television receivers
GB563569A (en) Improvements in saw-tooth wave form electric oscillation generators
GB678156A (en) Improvements relating to circuit arrangements for producing a unidirectional voltagefrom a sawtooth current in an inductance
GB566835A (en) Cathode ray beam deflecting circuits
GB524039A (en) Improvements in arrangements for generating electric currents of saw-tooth wave form
US2602896A (en) Saw-tooth wave generator
GB700454A (en) Improvements in thermionic oscillation generators
GB486528A (en) Improvements in or relating to electric circuits for generating currents of saw-tooth wave form
GB631972A (en) Sawtooth current oscillation generator
US2146769A (en) Separately controlled relaxation oscillator
US2409620A (en) Oscillation generator
US2301928A (en) Control system for industrial vibrating machinery
US2031100A (en) Oscillation generator
US2377370A (en) Voltage regulation
GB651456A (en) Improvements in scanning circuits for cathode ray apparatus and particularly for television apparatus
US2576634A (en) Electrotherapeutic impulse generator
GB655102A (en) Improvements in electrical oscillation generators
GB460693A (en) Thermionic tube electric oscillation generator circuit
GB700453A (en) Improvements in sawtooth current generators
US1877128A (en) Electron discharge device circuit arrangement
GB767263A (en) Improvements relating to operating circuits for cathode ray tubes of television receivers
GB470752A (en) Improvements in or relating to electrical oscillation generators
GB658762A (en) Improvements in circuits for producing sawtooth oscillations
GB639531A (en) Improvements in scanning circuits for television receivers
GB706167A (en) Improvements in or relating to circuits for generating sawtooth currents