GB1138123A - Improvements in or relating to two-way speech communication electric switching apparatus - Google Patents

Improvements in or relating to two-way speech communication electric switching apparatus

Info

Publication number
GB1138123A
GB1138123A GB1875667A GB1875667A GB1138123A GB 1138123 A GB1138123 A GB 1138123A GB 1875667 A GB1875667 A GB 1875667A GB 1875667 A GB1875667 A GB 1875667A GB 1138123 A GB1138123 A GB 1138123A
Authority
GB
United Kingdom
Prior art keywords
speech communication
relating
switching apparatus
electric switching
communication electric
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
GB1875667A
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.)
Brown Ltd S G
SG Brown Ltd
Original Assignee
Brown Ltd S G
SG Brown Ltd
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 Brown Ltd S G, SG Brown Ltd filed Critical Brown Ltd S G
Priority to GB1875667A priority Critical patent/GB1138123A/en
Publication of GB1138123A publication Critical patent/GB1138123A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0006—Permanent magnet actuating reed switches
    • H01H36/0066—Permanent magnet actuating reed switches magnet being removable, e.g. part of key pencil

Landscapes

  • Transceivers (AREA)
  • Toys (AREA)

Abstract

1,138,123. Radio signalling. S. G. BROWN Ltd. and T. D. IBBOTSON. 4 Dec., 1967 [24 April, 1967], No. 18756/67. Heading H4L. [Also in Division H1] A two way portable speech communication system is switched between " talk " and " listen " conditions by movement of a permanent magnet, on the operator's wrist, to the vicinity of a sealed switch contact device. The device is in a casing 13 clipped in the operator's pocket and is connected by cable 12 to a headset 10 and microphone 11 as well as to a radio transmitter-receiver and antenna unit 14.
GB1875667A 1967-04-24 1967-04-24 Improvements in or relating to two-way speech communication electric switching apparatus Expired GB1138123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1875667A GB1138123A (en) 1967-04-24 1967-04-24 Improvements in or relating to two-way speech communication electric switching apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1875667A GB1138123A (en) 1967-04-24 1967-04-24 Improvements in or relating to two-way speech communication electric switching apparatus

Publications (1)

Publication Number Publication Date
GB1138123A true GB1138123A (en) 1968-12-27

Family

ID=10117872

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1875667A Expired GB1138123A (en) 1967-04-24 1967-04-24 Improvements in or relating to two-way speech communication electric switching apparatus

Country Status (1)

Country Link
GB (1) GB1138123A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3571544A (en) * 1968-10-21 1971-03-23 Hilary William Sheehan Magnetic key operated switch for electrically operated hand tools
FR2488439A1 (en) * 1980-08-06 1982-02-12 Bersac Jean Safety cut=out switch for outboard engine of boat - has reed relay and triac potted in box with magnet in rubber pull-off cap attached by cord to operator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3571544A (en) * 1968-10-21 1971-03-23 Hilary William Sheehan Magnetic key operated switch for electrically operated hand tools
FR2488439A1 (en) * 1980-08-06 1982-02-12 Bersac Jean Safety cut=out switch for outboard engine of boat - has reed relay and triac potted in box with magnet in rubber pull-off cap attached by cord to operator

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