Door lock alarm

Details Door lock alarm Door lock alarm

1996-05-16

1997-11-11

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specific condition

340542, G08B 1308

Patent

active

056868901

ABSTRACT:
A lock and alarm device for securing a door activates an alarm of 110-120 decibels for approximately 60 seconds if a force on the door exceeding about 20-30 pounds is detected. An arrangement comprising a dead bolt or handle lock assembly includes an alarm unit mounted on a plate adjacent the lock for detecting forced entry.

REFERENCES:
patent: 2436470 (1948-02-01), Fleming
patent: 4196422 (1980-04-01), Swigert et al.
patent: 4360803 (1982-11-01), Heiland
patent: 5311168 (1994-05-01), Pease, Jr. et al.
patent: 5469139 (1995-11-01), Ko

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