Electronic door wedge alarm

Details Electronic door wedge alarm Electronic door wedge alarm

1989-09-14

1991-04-16

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

200 6162, 200 6193, 292339, G08B 1308

Patent

active

050086480

ABSTRACT:
A wedge-shaped device for use as an alarm for detecting the unauthorized opening of a hinged, inwardly-opening door may be easily installed at the base of the door to resist forced opening of the door while simultaneously sounding a highly audible alarm signal indicative of an attempt to break in. The device uses a top chassis mounted on a bottom chassis to initiate the alarm whenever the top chassis is forced downwardly onto the bottom chassis, and the alarm will continue to sound until the device is reset. The device maintains its wedge shape even after the top chassis is forced down onto the bottom chassis, thereby effectively preventing the door from opening inwardly until the device is removed from its position at the base of the door.

REFERENCES:
patent: 2870281 (1959-01-01), Mitchell
patent: 4442427 (1984-04-01), Morton
patent: 4540980 (1985-09-01), Porco
patent: 4607253 (1986-08-01), Wooten et al.
patent: 4890092 (1989-12-01), Grimm

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