GB194328A - Improvements in and relating to transmitting signalling systems employing thermionic valves and the like - Google Patents

Improvements in and relating to transmitting signalling systems employing thermionic valves and the like

Info

Publication number
GB194328A
GB194328A GB2357921A GB2357921A GB194328A GB 194328 A GB194328 A GB 194328A GB 2357921 A GB2357921 A GB 2357921A GB 2357921 A GB2357921 A GB 2357921A GB 194328 A GB194328 A GB 194328A
Authority
GB
United Kingdom
Prior art keywords
valve
valves
power
circuit
relating
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
GB2357921A
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.)
RADIO COMM CO Ltd
Original Assignee
RADIO COMM 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 RADIO COMM CO Ltd filed Critical RADIO COMM CO Ltd
Priority to GB2357921A priority Critical patent/GB194328A/en
Publication of GB194328A publication Critical patent/GB194328A/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
    • H03B7/00—Generation of oscillations using active element having a negative resistance between two of its electrodes
    • H03B7/02—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance
    • H03B7/04—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance active element being vacuum tube

Landscapes

  • Amplifiers (AREA)

Abstract

194,328. Taggart, J. Scott-, and Radio Communication Co., Ltd. Sept. 5,1921. Thermionic oscillation generators; thermionic modulating systems and apparatus. - Electric oscillations for wireless transmission are generated by a valve V2 of the kind described in Specification 166,260 and are amplified by one or more power valves V1 and thence transferred to the aerial. Modulation may be effected by a microphone coupled through a transformer to one of the circuits of the valve V2, or, as shown, to the grid circuit of the power valve V1. Other methods of modulation comprise the use of a diode or triode valve connected across the oscillatory circuit of the valve V2 and having its resistance varied microphonically. The oscillator cathode may have its emission varied by a low-frequency signalling current. The microphone circuit may be connected to an additional grid in the valve V2. According to the Provisional Specification, the power valve or valves may be of silica or metal, and the vacuum may be maintained by a pump, taps being provided to close the outlet tubes when desired.
GB2357921A 1921-09-05 1921-09-05 Improvements in and relating to transmitting signalling systems employing thermionic valves and the like Expired GB194328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2357921A GB194328A (en) 1921-09-05 1921-09-05 Improvements in and relating to transmitting signalling systems employing thermionic valves and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2357921A GB194328A (en) 1921-09-05 1921-09-05 Improvements in and relating to transmitting signalling systems employing thermionic valves and the like

Publications (1)

Publication Number Publication Date
GB194328A true GB194328A (en) 1923-03-05

Family

ID=10197958

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2357921A Expired GB194328A (en) 1921-09-05 1921-09-05 Improvements in and relating to transmitting signalling systems employing thermionic valves and the like

Country Status (1)

Country Link
GB (1) GB194328A (en)

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