GB442986A - Improvements in or relating to electrical signalling systems - Google Patents

Improvements in or relating to electrical signalling systems

Info

Publication number
GB442986A
GB442986A GB11870/35A GB1187035A GB442986A GB 442986 A GB442986 A GB 442986A GB 11870/35 A GB11870/35 A GB 11870/35A GB 1187035 A GB1187035 A GB 1187035A GB 442986 A GB442986 A GB 442986A
Authority
GB
United Kingdom
Prior art keywords
receiver
april
relating
master oscillator
signalling systems
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
GB11870/35A
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
C Lorenz AG
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 Standard Elektrik Lorenz AG, C Lorenz AG filed Critical Standard Elektrik Lorenz AG
Publication of GB442986A publication Critical patent/GB442986A/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S367/00—Communications, electrical: acoustic wave systems and devices
    • Y10S367/903—Transmit-receive circuitry

Abstract

442,986. Wireless signalling. LORENZ AKT.-GES., C., 1, Lorenzweg, Tempelhof, Berlin. April 17, 1935, No. 11870. Convention date, April 25, 1934. [Class 40 (v)] In a combined transmitter-receiver, the speech currents from the microphone M, in addition to feeding the modulation transformer TM, are used to disable the receiver and remove a disabling voltage from the master oscillator. For this purpose two rectifier-filter systems GS comprising dry rectifiers connected as a Graetz bridge produce D.C. control voltages in the resistances R1, R2, which control the bias of the master oscillator and some of the receiver valves respectively.
GB11870/35A 1934-04-25 1935-04-17 Improvements in or relating to electrical signalling systems Expired GB442986A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE442986X 1934-04-25

Publications (1)

Publication Number Publication Date
GB442986A true GB442986A (en) 1936-02-19

Family

ID=6526342

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11870/35A Expired GB442986A (en) 1934-04-25 1935-04-17 Improvements in or relating to electrical signalling systems

Country Status (3)

Country Link
US (1) US2144936A (en)
FR (1) FR789233A (en)
GB (1) GB442986A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537972A (en) * 1944-08-11 1951-01-16 Collins Radio Co Radio communication transmitting and receiving combination
US2459281A (en) * 1945-01-08 1949-01-18 Rca Corp Two-way radio equipment for lifeboat service
US2521860A (en) * 1948-03-30 1950-09-12 Union Switch & Signal Co Emergency break-in system for communication systems
US2766324A (en) * 1951-12-18 1956-10-09 Motorola Inc Switching system
US3181116A (en) * 1961-12-11 1965-04-27 William F Gordon Underwater telephone system
US3218607A (en) * 1962-12-10 1965-11-16 Bendix Corp Underwater telephone

Also Published As

Publication number Publication date
US2144936A (en) 1939-01-24
FR789233A (en) 1935-10-25

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