GB157303A - Improvements relating to cathode tube transmitters for telephony with high frequencyoscillations - Google Patents

Improvements relating to cathode tube transmitters for telephony with high frequencyoscillations

Info

Publication number
GB157303A
GB157303A GB121421A GB121421A GB157303A GB 157303 A GB157303 A GB 157303A GB 121421 A GB121421 A GB 121421A GB 121421 A GB121421 A GB 121421A GB 157303 A GB157303 A GB 157303A
Authority
GB
United Kingdom
Prior art keywords
speech
telephony
aerial
frequencyoscillations
line
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
GB121421A
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.)
DEUTSCHE TELEPHONWERKE GmbH
Original Assignee
DEUTSCHE TELEPHONWERKE GmbH
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 DEUTSCHE TELEPHONWERKE GmbH filed Critical DEUTSCHE TELEPHONWERKE GmbH
Publication of GB157303A publication Critical patent/GB157303A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Abstract

157,303. Deutsche Telephonwerke Ges., (Assignees of Fassbender, H., and Habann, E.). Aug. 29, 1918, [Convention date]. Void [Published under Sect. 91 of the Act]. Thermionic modulating systems; thermionic oscillation generators.-In a system of telephony utilizing high-frequency oscillations, energy is transferred to the line or aerial, only when speech is in progress. The plate circuits of two valves 1. 2 oscillating continuously at the same frequency, which is determined by the tuned circuit 13, are differentially coupled by means of the oppositely wound coils 7, 8 to the output circuit 5, 6. Speech unbalances the system by means of the microphone 10 and transformer 9 and high-frequency oscillations are sent to line or aerial modulated in accordance with the speech currents.
GB121421A 1918-08-29 1921-01-10 Improvements relating to cathode tube transmitters for telephony with high frequencyoscillations Expired GB157303A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE157303X 1918-08-29

Publications (1)

Publication Number Publication Date
GB157303A true GB157303A (en) 1922-01-19

Family

ID=5678552

Family Applications (1)

Application Number Title Priority Date Filing Date
GB121421A Expired GB157303A (en) 1918-08-29 1921-01-10 Improvements relating to cathode tube transmitters for telephony with high frequencyoscillations

Country Status (1)

Country Link
GB (1) GB157303A (en)

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