Switch device for indicating the undue opening of doors and clos

Details Switch device for indicating the undue opening of doors and clos Switch device for indicating the undue opening of doors and clos

1974-08-12

1976-06-29

Scott, James R.

Electricity: circuit makers and breakers

Special application

Actuated concurrently with operation or use of art device

200 6168, 200 6182, H01H 2700, H01H 316

Patent

active

039670805

ABSTRACT:
An intrusion detector device for signalling undue opening of doors and closing-wings in general. The device is housed in a cavity of the door jamb and comprises means for supporting an alarm controlling switch and an element swinging supported and retained in an inoperative position by elastic means, said element being engageable by a lock bolt or pin projecting from the door when an undue force is exerted on the door, thus causing said element to rotate in an operative position in which said switch actuates an alarm.

REFERENCES:
patent: 2660632 (1953-11-01), Makishima
patent: 3263040 (1966-07-01), Bliven
patent: 3694595 (1972-09-01), Horecky
patent: 3810145 (1974-05-01), Gusaras

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