GB149214A - Improvements in wireless telephone transmitters - Google Patents

Improvements in wireless telephone transmitters

Info

Publication number
GB149214A
GB149214A GB20961/20A GB2096120A GB149214A GB 149214 A GB149214 A GB 149214A GB 20961/20 A GB20961/20 A GB 20961/20A GB 2096120 A GB2096120 A GB 2096120A GB 149214 A GB149214 A GB 149214A
Authority
GB
United Kingdom
Prior art keywords
valve
oscillations
grid
transformer
circuit
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
GB20961/20A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB149214A publication Critical patent/GB149214A/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
    • H03C1/24—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to different grid

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Selective Calling Equipment (AREA)

Abstract

149,214. Loewe, S. Oct. 29, 1918, [Convention date]. Wireless telephony; electric oscillations, producing.-In thermionic apparatus particularly applicable to wireless telephony, the transmitting-valve 1 is in parallel with a control valve 10, both being supplied with energy from a common source 5, the current to each passing through a coil 7 in, or coupled to, the antenna circuit. The grid circuit of the control valve 10 includes a transformer 15 influenced by telephone currents produced in any suitable way, a condenser telephone in conjunction with an.amplifier being mentioned as particularly suitable. The grid circuit 9 is tuned to approximately the same frequency as the antenna circuit so that the valve 1 produces continuous oscillations. By supplying oscillations of suitable frequency through transformer 15, the apparatus may be used for production of audibly modulated waves. The Specification as open to inspection under Sect. 91 (3) (a) states that the two valves may be combined in one tube having two grids, the control grid being near to the cathode. This subject-matter does not appear in the Specification as accepted.
GB20961/20A 1918-10-29 1920-07-12 Improvements in wireless telephone transmitters Expired GB149214A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL47378D DE379883C (en) 1918-10-29 1918-10-29 Circuit for high frequency telephony

Publications (1)

Publication Number Publication Date
GB149214A true GB149214A (en) 1922-01-12

Family

ID=7272008

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20961/20A Expired GB149214A (en) 1918-10-29 1920-07-12 Improvements in wireless telephone transmitters

Country Status (5)

Country Link
US (1) US1652486A (en)
DE (1) DE379883C (en)
FR (1) FR525251A (en)
GB (1) GB149214A (en)
NL (1) NL10067C (en)

Also Published As

Publication number Publication date
DE379883C (en) 1923-08-29
NL10067C (en)
US1652486A (en) 1927-12-13
FR525251A (en) 1921-09-17

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