GB137098A - Improvements in wireless telephone transmitters - Google Patents

Improvements in wireless telephone transmitters

Info

Publication number
GB137098A
GB137098A GB2166718A GB2166718A GB137098A GB 137098 A GB137098 A GB 137098A GB 2166718 A GB2166718 A GB 2166718A GB 2166718 A GB2166718 A GB 2166718A GB 137098 A GB137098 A GB 137098A
Authority
GB
United Kingdom
Prior art keywords
oscillator
anode
microphone
potential
valve
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
GB2166718A
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.)
RICHARD HARRY WAGNER
Original Assignee
RICHARD HARRY WAGNER
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 RICHARD HARRY WAGNER filed Critical RICHARD HARRY WAGNER
Priority to GB2166718A priority Critical patent/GB137098A/en
Publication of GB137098A publication Critical patent/GB137098A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/16—Amplitude modulation by means of discharge device having at least three electrodes
    • H03C1/18—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid
    • H03C1/22—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to same grid

Landscapes

  • Transmitters (AREA)

Abstract

137,098. Turner, L. B., and Wagner, R. H. Dec. 24, 1918. Wireless telephony; electric oscillations, producing.-A wireless telephone transmitter comprises a relatively feeble valve oscillator 3 in which the amplitude of oscillation is controlled by the voice, and a valve amplifier 4 serving to amplify the valve-controlled oscillation. The mean anode potential of the oscillator 3 may be varied directly by a microphone or by a control valve 11. In the arrangement shown in Fig. 1, the anode battery 12 of the control valve is connected to the anode through a choke coil 13, and the anode is connected to the anode battery 14 of the oscillator 3. Alternatively, the microphone or the control valve may vary the grid potential of the oscillator or may control the amplitude and frequency of the oscillation in the oscillator by introducing more or less resisttance into its circuit. The potential of the battery 10 in the grid circuit of the amplifier may be such that the grid never becomes positive. In order to reduce or prevent radiation except when the microphone is disturbed by speech, the anode potential of the oscillator 3 may be just insufficient to allow it to generate oscillations except when the anode potential is raised by the fluctuation of the microphone current. The microphone may be replaced by an electro-magnetic transmitter.
GB2166718A 1918-12-24 1918-12-24 Improvements in wireless telephone transmitters Expired GB137098A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2166718A GB137098A (en) 1918-12-24 1918-12-24 Improvements in wireless telephone transmitters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2166718A GB137098A (en) 1918-12-24 1918-12-24 Improvements in wireless telephone transmitters

Publications (1)

Publication Number Publication Date
GB137098A true GB137098A (en) 1920-01-08

Family

ID=10166770

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2166718A Expired GB137098A (en) 1918-12-24 1918-12-24 Improvements in wireless telephone transmitters

Country Status (1)

Country Link
GB (1) GB137098A (en)

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