Switch means for radio alarm device

Details Switch means for radio alarm device Switch means for radio alarm device

1977-03-22

1978-10-17

Griffin, Robert L.

Communications: electrical

Systems

Portable self-contained

325 16, 325111, 325118, 340539, 340573, H04B 1034

Patent

active

041211600

ABSTRACT:
In a miniature concealable radio alarm transmitter to be worn on the person, a switch means to activate the transmitter. The transmitter is preferably flat in shape, and includes a small battery which extends across the end of the circuit board. Two spring contact members extend adjacent each end of the battery, which has button-type terminals on its ends. A soft sponge elastomer spacer is fitted between each contact member and its end of the battery. The spacer has a central hole. Finger pressure against either spring member forces it toward the adjacent battery terminal to make contact therewith. To connect the battery to the circuit and energize the alarm transmitter, both spring members must be squeezed toward each other from opposite sides of the transmitter, making contact with each battery terminal. It is thus difficult to accidentally activate the transmitter. The switch means comprises two switches in series. The whole device is preferably cased in a bag-like enclosure of soft flexible material with a cord adapted to be hung around the wearer's neck.

REFERENCES:
patent: 1993436 (1935-03-01), Eberhard
patent: 2367441 (1945-11-01), Schwinn
patent: 2665342 (1954-01-01), Vadnais
patent: 2694117 (1954-11-01), Bakke
patent: 2810068 (1957-10-01), Weisz et al.
patent: 3183443 (1965-05-01), Lefevre
patent: 3209089 (1965-09-01), Weissburg
patent: 3668528 (1972-06-01), Hutchinson et al.

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