GB144803A - Improvements in and relating to wireless signalling systems - Google Patents

Improvements in and relating to wireless signalling systems

Info

Publication number
GB144803A
GB144803A GB665619A GB665619A GB144803A GB 144803 A GB144803 A GB 144803A GB 665619 A GB665619 A GB 665619A GB 665619 A GB665619 A GB 665619A GB 144803 A GB144803 A GB 144803A
Authority
GB
United Kingdom
Prior art keywords
grids
filaments
potential
aerial
filament
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
GB665619A
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 GB665619A priority Critical patent/GB144803A/en
Publication of GB144803A publication Critical patent/GB144803A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C7/00—Modulating electromagnetic waves
    • H03C7/02—Modulating electromagnetic waves in transmission lines, waveguides, cavity resonators or radiation fields of antennas

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Transmitters (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Amplifiers (AREA)

Abstract

144,803. British Thomson - Houston Co., (General Electric Co.). March 17, 1919. Vacuum tubes.-In a system of wireless telephony an electron discharge device is employed having two filaments 23, 24 and two grids 25, but no third or plate electrodes. The microphone currents operate through the transformer 26 to put variable potential on the grids 25, the secondary being divided and so connected that the two grids become positive and negative at the same time. The filaments are connected by leads 27, 28 to an oscillation transformer or resonant circuit which couples the electron device to an aerial in which oscillations are produced from some independent source. An oscillating potential of high value is thus maintained between the two filaments, and while the grids are at positive potential, current flows alternately at the oscillation frequency from filament 23 to filament 24 and conversely, thus diverting energy from the aerial in accordance with the variations of the speaking current during each half cycle.
GB665619A 1919-03-17 1919-03-17 Improvements in and relating to wireless signalling systems Expired GB144803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB665619A GB144803A (en) 1919-03-17 1919-03-17 Improvements in and relating to wireless signalling systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB665619A GB144803A (en) 1919-03-17 1919-03-17 Improvements in and relating to wireless signalling systems

Publications (1)

Publication Number Publication Date
GB144803A true GB144803A (en) 1920-06-17

Family

ID=9818396

Family Applications (1)

Application Number Title Priority Date Filing Date
GB665619A Expired GB144803A (en) 1919-03-17 1919-03-17 Improvements in and relating to wireless signalling systems

Country Status (1)

Country Link
GB (1) GB144803A (en)

Similar Documents

Publication Publication Date Title
GB555162A (en) Electron beam discharge apparatus incorporating resonant chamber circuits
US2048723A (en) Thermionic oscillation generator
USRE23277E (en) High-frequency resonator tube
GB144803A (en) Improvements in and relating to wireless signalling systems
GB623017A (en) Improvements in circuits for the generation of saw-tooth oscillations and for the supply of high voltage
GB577278A (en) Improvements in or relating to electron discharge apparatus for operation at ultra-high frequencies
US1402931A (en) Method and apparatus for the production and utilization of electric currents
US2171980A (en) Electron discharge device
GB483839A (en) Improvements in or relating to magnetron electron discharge devices and arrangementsincorporating the same
US1797205A (en) Electron tube apparatus
US1714404A (en) Electrical apparatus
US2103638A (en) Oscillation generator
US2118414A (en) Thermionic oscillation generator
US1781861A (en) Sahf maubeb assionob to said bittenhouse
US1906558A (en) Current converting device
GB184875A (en) Improvements in and relating to electron discharge apparatus
US2668257A (en) Electric discharge tube of the cavity resonator type
US1118174A (en) Alternating-current generator.
USRE18368E (en) Ments
US1541566A (en) System for producing oscillations
GB660728A (en) Improvements in or relating to high frequency amplifiers
US1646517A (en) Key circuit for tube senders
US1595429A (en) Control of electrical energy
US3029395A (en) Regenerative circuit for cold cathode vacuum tubes
GB172593A (en) Improvements in and relating to electron discharge devices