GB164105A - Improvements in wireless telephony - Google Patents

Improvements in wireless telephony

Info

Publication number
GB164105A
GB164105A GB607920A GB607920A GB164105A GB 164105 A GB164105 A GB 164105A GB 607920 A GB607920 A GB 607920A GB 607920 A GB607920 A GB 607920A GB 164105 A GB164105 A GB 164105A
Authority
GB
United Kingdom
Prior art keywords
circuit
oscillations
valves
tuned
speech
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
GB607920A
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
Priority to NL9189D priority Critical patent/NL9189C/xx
Priority to FR530868D priority patent/FR530868A/fr
Application filed by Individual filed Critical Individual
Priority to GB607920A priority patent/GB164105A/en
Publication of GB164105A publication Critical patent/GB164105A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/06—Means for changing frequency deviation

Landscapes

  • Transmitters (AREA)

Abstract

164,105. Ditcham, W. T. Feb. 28, 1920. Thermionic oscillation generators; thermionic modulating systems and apparatus.-In a system of wireless telephony, two valves A<3>, A' produce continuous oscillations and are coupled as shown through a rectifying-valve C<2> to the circuit D<2> tuned to the difference between the frequencies. The oscillations in one of the valves A', A<4> are modulated by speech in a microphone M as shown, or by other means. The speech may affect both valves A<3>, A' in opposite directions. The beat-frequency oscillations in the circuit D<2> are used to modulate high-frequency oscillations in an aerial circuit produced by the generator K. In an alternative arrangement, the beat frequency oscillations alone excite the aerial which is tuned to the same frequency as the circuit D<2>. According to the Provisional Specification, the valve H<1> is connected to its coupling coil I through a condenser in parallel with a resistance.
GB607920A 1920-02-28 1920-02-28 Improvements in wireless telephony Expired GB164105A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL9189D NL9189C (en) 1920-02-28
FR530868D FR530868A (en) 1920-02-28
GB607920A GB164105A (en) 1920-02-28 1920-02-28 Improvements in wireless telephony

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB607920A GB164105A (en) 1920-02-28 1920-02-28 Improvements in wireless telephony

Publications (1)

Publication Number Publication Date
GB164105A true GB164105A (en) 1921-05-30

Family

ID=9807983

Family Applications (1)

Application Number Title Priority Date Filing Date
GB607920A Expired GB164105A (en) 1920-02-28 1920-02-28 Improvements in wireless telephony

Country Status (3)

Country Link
FR (1) FR530868A (en)
GB (1) GB164105A (en)
NL (1) NL9189C (en)

Also Published As

Publication number Publication date
FR530868A (en) 1922-01-03
NL9189C (en)

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