Electromagnetic door security system

Details Electromagnetic door security system Electromagnetic door security system

2006-05-30

2006-05-30

Glessner, Brian E. (Department: 3676)

Locks

Special application

For closures

C292S092000, C070S276000

Reexamination Certificate

active

07051560

ABSTRACT:
An exit sensor bar for securing a door has an elongated housing and a mounting pad for mounting to a door. A circuit board assembly is disposed within the elongated housing in proximity to a blade of the mounting pad. The circuit board assembly includes at least an electro-optical source and an electro-optical detector coupled to a lock. The electro-optical detector selectively energizing and de-energizing the lock in response to the detection of light emitted from the electro-optical source. When a push force is applied to the elongated housing, the housing is displaced toward the mounting pad such that the blade obstructs light emitted from the electro-optical source. In response to the non-detection of the emitted light, the electro-optical detector de-energizes the lock freeing the door for egress.

REFERENCES:
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patent: 5517176 (1996-05-01), Lavelle et al.
patent: 5988708 (1999-11-01), Frolov et al.
patent: 6104594 (2000-08-01), Frolov et al.
patent: 2004/0255626 (2004-12-01), Petasch et al.
patent: 2005/0044908 (2005-03-01), Min

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