GB224533A - Improvements in high frequency signalling systems - Google Patents

Improvements in high frequency signalling systems

Info

Publication number
GB224533A
GB224533A GB26417/24A GB2641724A GB224533A GB 224533 A GB224533 A GB 224533A GB 26417/24 A GB26417/24 A GB 26417/24A GB 2641724 A GB2641724 A GB 2641724A GB 224533 A GB224533 A GB 224533A
Authority
GB
United Kingdom
Prior art keywords
valve
radiating
thermionic
storage
oscillations
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
GB26417/24A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB224533A publication Critical patent/GB224533A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/10—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being vacuum tube

Landscapes

  • Radiation-Therapy Devices (AREA)

Abstract

224,533. British Thomson - Houston Co., Ltd., (Assignees of Baker, W. R. G.). Nov. 6, 1923, [Convention date]. Thermionic generators; thermionic and magnetic modulating systems.-Relates to signalling systems in which the output from a thermionic high-frequency generator is fed to an intermediate storage circuit, which transfers energy to the aerial system during marking intervals only, and not during spacing intervals although the valve is continuously active. In order to maintain the valve oscillations at constant frequency, in spite of the variable coupling between the storage and radiating circuits, the grid of the oscillator is energized from the radiating circuit only. High-frequency oscillations from the valve 1 are fed to the storage circuit 7, 8 which is coupled through an earthed link circuit 13, 14, 15 with a radiating antenna 10, 11, 12 of the multiple tuned type. The coupling between the storage and radiating circuits is controlled by a magnetic modulator 21, 22, which detunes the storage circuit under the action of a signalling key 23. The necessary grid excitation to maintain the valve oscillations is derived by a tapping 17 from the coil 16, the connection including a shunted condenser 18, 19 and a series resistance 20.
GB26417/24A 1923-11-06 1924-11-05 Improvements in high frequency signalling systems Expired GB224533A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US224533XA 1923-11-06 1923-11-06

Publications (1)

Publication Number Publication Date
GB224533A true GB224533A (en) 1925-06-04

Family

ID=21809671

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26417/24A Expired GB224533A (en) 1923-11-06 1924-11-05 Improvements in high frequency signalling systems

Country Status (1)

Country Link
GB (1) GB224533A (en)

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