Alarm generating door lock

Details Alarm generating door lock Alarm generating door lock

2005-11-29

2005-11-29

Pham, Toan N. (Department: 2632)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S543000, C070S091000, C070S116000

Reexamination Certificate

active

06970084

ABSTRACT:
A door lock includes a body, a locking device installed in part of the body to lock and unlock an entrance door and having a first handle provided at an inner side of the entrance door, a lock assembly engaged with the first handle when a normal key is inserted, and a locking member actuated by rotation of the first handle, a first sensing device which becomes an ON state as the locking member protrudes outside the locking device and an OFF state as the protruded locking member retreats, a speaker generating alarm when the first sensing device senses an intruder, and a power portion supplying electric power to the first sensing device and the speaker, wherein holes, through which the first handle and part of the first sensing device are exposed, are formed at an outer surface of the body, a cover is provided at a portion corresponding to the power portion, and the speaker is installed on the body so that sound is emitted out of the body.

REFERENCES:
patent: 4360803 (1982-11-01), Heiland
patent: 4970494 (1990-11-01), Keely et al.
patent: 5311168 (1994-05-01), Pease, Jr. et al.
patent: 5754107 (1998-05-01), Ferrantelli
patent: 6020816 (2000-02-01), Agozzino
patent: 6812836 (2004-11-01), Soloway et al.

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