GB470922A - Improvements in or relating to television and like systems - Google Patents

Improvements in or relating to television and like systems

Info

Publication number
GB470922A
GB470922A GB549236A GB549236A GB470922A GB 470922 A GB470922 A GB 470922A GB 549236 A GB549236 A GB 549236A GB 549236 A GB549236 A GB 549236A GB 470922 A GB470922 A GB 470922A
Authority
GB
United Kingdom
Prior art keywords
condenser
grid
scanning
coil
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
GB549236A
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.)
DAVID MALCOLM JOHNSTONE
Baird Television Ltd
Original Assignee
DAVID MALCOLM JOHNSTONE
Baird Television 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 DAVID MALCOLM JOHNSTONE, Baird Television Ltd filed Critical DAVID MALCOLM JOHNSTONE
Priority to GB549236A priority Critical patent/GB470922A/en
Priority to DEF82562D priority patent/DE762989C/en
Publication of GB470922A publication Critical patent/GB470922A/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

Abstract

470,922. Valve generating circuits. BAIRD TELEVISION, Ltd., and JOHNSTONE, D. M. Feb. 24, 1936, No. 5492. [Class 40 (v)] A scanning-oscillator is arranged to produce current of saw-tooth form through its anode circuit by providing a back coupling between two grid circuits, one of which includes a resistance - capacity combination. The anode circuit may include a scanning- coil, or a resistance with the deflecting-plates connected across it. As shown, a condenser 3 is connected between resistances 2, 6, both of which may be variable, across the supply source. The positive side of the condenser 3 is connected to the inner grid of a valve 1 through a coil 4 which is coupled to a coil 5 in the circuit of the positively-polarized screen grid. The anode circuit includes an inductance 7 and is connected by a condenser 8 to the scanning-coils. The condenser 3 is slowly charged through the resistances 2, 6 and when the inner grid reaches a certain positive voltage the valve breaks into self-oscillation and the condenser quickly discharges. Synchronizing pulses may be applied to the suppressor grid or to the inner grid by connections across the resistance 2. If electrostatic scanning is employed, the anode impedance 7 is resistive.
GB549236A 1936-02-24 1936-02-24 Improvements in or relating to television and like systems Expired GB470922A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB549236A GB470922A (en) 1936-02-24 1936-02-24 Improvements in or relating to television and like systems
DEF82562D DE762989C (en) 1936-02-24 1937-02-25 Einroehrenkippgeraet for the magnetic deflection of electron beams

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB549236A GB470922A (en) 1936-02-24 1936-02-24 Improvements in or relating to television and like systems

Publications (1)

Publication Number Publication Date
GB470922A true GB470922A (en) 1937-08-24

Family

ID=9797214

Family Applications (1)

Application Number Title Priority Date Filing Date
GB549236A Expired GB470922A (en) 1936-02-24 1936-02-24 Improvements in or relating to television and like systems

Country Status (2)

Country Link
DE (1) DE762989C (en)
GB (1) GB470922A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE756806C (en) * 1938-12-11 1953-03-23 Telefunken Gmbh Arrangement for synchronizing a saw tooth current generator, which contains a parallel resonance circuit and a transformer-based voltage-fed back tube
DE974038C (en) * 1940-12-11 1960-08-25 Siemens Ag Circuit arrangement for generating breakover voltages

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2055611A (en) * 1932-12-29 1936-09-29 Nakashima Tomomasa Saw-tooth wave form current and voltage generating device
NL40069C (en) * 1933-08-03
GB423685A (en) * 1933-11-03 1935-02-06 Michael Bowman Manifold Improvements in and relating to television and like systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE756806C (en) * 1938-12-11 1953-03-23 Telefunken Gmbh Arrangement for synchronizing a saw tooth current generator, which contains a parallel resonance circuit and a transformer-based voltage-fed back tube
DE974038C (en) * 1940-12-11 1960-08-25 Siemens Ag Circuit arrangement for generating breakover voltages

Also Published As

Publication number Publication date
DE762989C (en) 1958-04-24

Similar Documents

Publication Publication Date Title
GB489231A (en) Improvements in or relating to television systems
GB471737A (en) Improvements in and relating to electric oscillation generators
GB419441A (en) Improvements in or relating to television and the like systems
GB693893A (en) Improvements relating to electronic switching circuits
GB470922A (en) Improvements in or relating to television and like systems
GB556511A (en) Improvements in and relating to time delay electric relays
GB479732A (en) Improvements in electric relaxation oscillators
US2300524A (en) Oscillator
GB489625A (en) Improvements in periodic voltage generator
GB552062A (en) Improvements in or relating to electrical impulse transmission
GB447403A (en) Improvements in or relating to television and like systems
GB422906A (en) Improvements in and relating to signalling systems, such for example as television systems
US2258669A (en) Electrical fence charging apparatus
GB482724A (en) Improvements in or relating to generators of relaxation oscillations
GB228647A (en) Improvements in electric relay apparatus employing thermionic valves
GB582758A (en) Improvements in or relating to electronic relay circuit arrangements
US2634385A (en) Electron tube circuits
SU77491A3 (en) Detector device
GB420091A (en) Improvements in or relating to television systems and apparatus and circuits therefor
GB629504A (en) Improvements relating to apparatus for discriminating between electrical pulses
GB622656A (en) Improvements in or relating to circuits for producing a sawtooth-shaped current in the deflecting coils of a cathode-ray tube
GB423166A (en) Improvements in and relating to systems of electric welding
GB498210A (en) Improvements in and relating to electric valve circuits
GB415983A (en) Improvements in and relating to intermittent current generators
GB596027A (en) Improvements in or relating to thermionic valve signalling systems