GB184498A - Improvements in and relating to systems for signalling by means of high frequency currents - Google Patents

Improvements in and relating to systems for signalling by means of high frequency currents

Info

Publication number
GB184498A
GB184498A GB451321A GB451321A GB184498A GB 184498 A GB184498 A GB 184498A GB 451321 A GB451321 A GB 451321A GB 451321 A GB451321 A GB 451321A GB 184498 A GB184498 A GB 184498A
Authority
GB
United Kingdom
Prior art keywords
valves
circuits
plate
inductance
plate circuits
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
GB451321A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to GB451321A priority Critical patent/GB184498A/en
Publication of GB184498A publication Critical patent/GB184498A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • General Induction Heating (AREA)

Abstract

184,498. British Thomson - Houston Co., Ltd., (General Electric Co.). Feb. 8, 1921. Thermionic oscillation generators and modulating systems.-A transmitting system comprises three-electrode valves 2, 3, having coupled grid and plate circuits for producing oscillations and oppositely connected to a source 1 of lowfrequency alternating current, a second pair of valves 4, 5 for modulating the oscillations, also oppositely connected to the source 1, and an inductance 10 common to all the plate circuits. The plate circuits are fed through a transformer 8, the middle point of the secondary of which is connected to earth through the inductance 10. A shunt for the high-frequency currents is provided by condensers 17, 18 and a coil 19 which is coupled to a coil 20 in the grid circuits of tubes 2, 3 and to a coil 23 in the aerial, which is the only tuned circuit in the system. Choke coils 11, 14 are provided in the plate circuits. Signalling currents may be impressed upon the grids of the modulating valves 4, 5, alterations of the plate currents varying the potential drop across the inductance 10 in the plate circuits of the oscillating valves. The filaments are heated by means of a transformer 6, 7, the middle point of the secondary 7 being preferably grounded.
GB451321A 1921-02-08 1921-02-08 Improvements in and relating to systems for signalling by means of high frequency currents Expired GB184498A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB451321A GB184498A (en) 1921-02-08 1921-02-08 Improvements in and relating to systems for signalling by means of high frequency currents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB451321A GB184498A (en) 1921-02-08 1921-02-08 Improvements in and relating to systems for signalling by means of high frequency currents

Publications (1)

Publication Number Publication Date
GB184498A true GB184498A (en) 1922-08-08

Family

ID=9778614

Family Applications (1)

Application Number Title Priority Date Filing Date
GB451321A Expired GB184498A (en) 1921-02-08 1921-02-08 Improvements in and relating to systems for signalling by means of high frequency currents

Country Status (1)

Country Link
GB (1) GB184498A (en)

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