GB154181A - Improvements in wireless telephone transmitters - Google Patents

Improvements in wireless telephone transmitters

Info

Publication number
GB154181A
GB154181A GB3030520A GB3030520A GB154181A GB 154181 A GB154181 A GB 154181A GB 3030520 A GB3030520 A GB 3030520A GB 3030520 A GB3030520 A GB 3030520A GB 154181 A GB154181 A GB 154181A
Authority
GB
United Kingdom
Prior art keywords
valve
anode
wireless telephone
wireless
microphone
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
GB3030520A
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.)
Telefunken AG
Original Assignee
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
Publication of GB154181A publication Critical patent/GB154181A/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
    • H03C1/26—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to cathode

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Transmitters (AREA)

Abstract

154,181. Ges. f³r Drahtlose Telegraphie. Nov. 11, 1919, [Convention date]. Void [Published under Sect. 91 of the Act]. Wireless telephony; wireless signalling.-In a wireless telephone transmitter, the microphone 1 varies the amplitude of oscillations produced by a valve generator 4, through the medium of a thermionic relay 3 the anode-cathode resistance of which is included in the anode circuit of the valve 4. Microphone currents vary the internal resistance of the valve 3 and hence the potential of the anode of the generating-valve 4.
GB3030520A 1919-11-12 1920-10-26 Improvements in wireless telephone transmitters Expired GB154181A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1919G0049599 DE439117C (en) 1919-11-12 1919-11-12 Device for wireless telephony with cathode tube transmitter

Publications (1)

Publication Number Publication Date
GB154181A true GB154181A (en) 1922-01-05

Family

ID=7129048

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3030520A Expired GB154181A (en) 1919-11-12 1920-10-26 Improvements in wireless telephone transmitters

Country Status (2)

Country Link
DE (1) DE439117C (en)
GB (1) GB154181A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61193235U (en) * 1985-05-24 1986-12-01

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61193235U (en) * 1985-05-24 1986-12-01
JPH055293Y2 (en) * 1985-05-24 1993-02-12

Also Published As

Publication number Publication date
DE439117C (en) 1927-01-04

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