GB708064A - Improvements in and relating to radio communication systems and apparatus - Google Patents

Improvements in and relating to radio communication systems and apparatus

Info

Publication number
GB708064A
GB708064A GB266351A GB266351A GB708064A GB 708064 A GB708064 A GB 708064A GB 266351 A GB266351 A GB 266351A GB 266351 A GB266351 A GB 266351A GB 708064 A GB708064 A GB 708064A
Authority
GB
United Kingdom
Prior art keywords
loudspeaker
switch
relating
radio communication
communication 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
GB266351A
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.)
INTERNAT AERADIO Ltd
MAURICE IVOR FORSYTH GRANT
Original Assignee
INTERNAT AERADIO Ltd
MAURICE IVOR FORSYTH GRANT
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 INTERNAT AERADIO Ltd, MAURICE IVOR FORSYTH GRANT filed Critical INTERNAT AERADIO Ltd
Priority to GB266351A priority Critical patent/GB708064A/en
Publication of GB708064A publication Critical patent/GB708064A/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
    • H04B1/50—Circuits using different frequencies for the two directions of communication

Abstract

708,064. Press-button switches. INTERNATIONAL AERADIO, Ltd., and GRANT, M. I. FORSYTH-. Jan. 18, 1952 [Feb. 2, 1951], No. 2663/51. Class 38(5) [Also in Group XL(c)] A control switch and indicator for a radio transmitter and loudspeaker receiver comprises a lamp 16 permanently connected to the receiver circuit for indicating when a call is being received and a push switch with projecting sliding rod 22 connected to earth at CO for short-circuiting or attenuating the loudspeaker when contacting contact C1 and on further depressing the push switch rod to meet contact C2, rendering the transmitter operative. The switch comprises two helical springs 17, 18 of different stiffness separated by a washer 19 so that only after the first has been fully depressed by the plunger 11 is the greater stiffness of the second spring encountered.
GB266351A 1951-02-02 1951-02-02 Improvements in and relating to radio communication systems and apparatus Expired GB708064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB266351A GB708064A (en) 1951-02-02 1951-02-02 Improvements in and relating to radio communication systems and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB266351A GB708064A (en) 1951-02-02 1951-02-02 Improvements in and relating to radio communication systems and apparatus

Publications (1)

Publication Number Publication Date
GB708064A true GB708064A (en) 1954-04-28

Family

ID=9743569

Family Applications (1)

Application Number Title Priority Date Filing Date
GB266351A Expired GB708064A (en) 1951-02-02 1951-02-02 Improvements in and relating to radio communication systems and apparatus

Country Status (1)

Country Link
GB (1) GB708064A (en)

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