GB494685A - Improvements in or relating to thermionic valve oscillation generators - Google Patents

Improvements in or relating to thermionic valve oscillation generators

Info

Publication number
GB494685A
GB494685A GB1222137A GB1222137A GB494685A GB 494685 A GB494685 A GB 494685A GB 1222137 A GB1222137 A GB 1222137A GB 1222137 A GB1222137 A GB 1222137A GB 494685 A GB494685 A GB 494685A
Authority
GB
United Kingdom
Prior art keywords
valve
grid
anode
relating
synchronizing signals
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
GB1222137A
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.)
GEORGE RICHARD TINGLEY
Baird Television Ltd
Original Assignee
GEORGE RICHARD TINGLEY
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 GEORGE RICHARD TINGLEY, Baird Television Ltd filed Critical GEORGE RICHARD TINGLEY
Priority to GB1222137A priority Critical patent/GB494685A/en
Publication of GB494685A publication Critical patent/GB494685A/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

  • Prostheses (AREA)

Abstract

494,685. Valve generating circuits. BAIRD TELEVISION, Ltd., and TINGLEY, G. R. April 29, 1937, No. 12221. [Class 40 (v)] In a scanning oscillator of the type in which anode and grid circuits of a thermionic valve 1 are magnetically coupled by means of a transformer 2 to an extent sufficient to produce sawtooth oscillations whose frequency is determined by resistance 3, an auxiliary valve 10 having a control grid is reversely connected in parallel across the anode to cathode space of the oscillating valve. Synchronizing signals or a substantially direct current signal derived for example as described in Specification 472,686, [Group XXXV], may be applied to the grid of the valve 10 to control the initiation of the scanning process. The valve 10 may be so biassed that it acts as a separator of mixed picture and synchronizing signals. Specifications 456,138 and 465,344 also are referred to.
GB1222137A 1937-04-29 1937-04-29 Improvements in or relating to thermionic valve oscillation generators Expired GB494685A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1222137A GB494685A (en) 1937-04-29 1937-04-29 Improvements in or relating to thermionic valve oscillation generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1222137A GB494685A (en) 1937-04-29 1937-04-29 Improvements in or relating to thermionic valve oscillation generators

Publications (1)

Publication Number Publication Date
GB494685A true GB494685A (en) 1938-10-31

Family

ID=10000574

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1222137A Expired GB494685A (en) 1937-04-29 1937-04-29 Improvements in or relating to thermionic valve oscillation generators

Country Status (1)

Country Link
GB (1) GB494685A (en)

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