Alarm activating device

Details Alarm activating device Alarm activating device

1979-03-05

1980-10-07

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

340539, 340574, 340665, 340668, 200 85R, 200 67B, 200 6176, 455100, G08B 1310, G08B 108, H04Q 700

Patent

active

042271894

ABSTRACT:
An alarm activating device is provided for closing a normally open circuit upon release of body pressure upon the rearward wall of the device, comprising a first, second, and third plate supported respectively in substantially parallel alignment behind a mounting plate, which mounting plate is adapted to be secured behind a belt in close proximity to a body, the first and third plates being spaced-apart and movable together from a position wherein one contacts the second plate, to a position where the other contacts the second plate, including means for applying constant positive pressure to the first plate opposite the second plate, and further including a first and a second contact in series circuit relationship, supported adjacent one another in alignment on the first and second plates.

REFERENCES:
patent: 1758546 (1930-05-01), Wartmann
patent: 2135476 (1938-11-01), Rush
patent: 2249645 (1941-07-01), Applegarth
patent: 2381547 (1945-08-01), Leininger
patent: 2996587 (1961-08-01), McCarthy
patent: 3440635 (1969-04-01), Hull
patent: 3911394 (1975-10-01), Shames

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