Door security system

Details Door security system Door security system

1993-11-08

1996-06-11

Williams, Hezron E.

Communications: electrical

Condition responsive indicating system

Specific condition

2922515, E05C 1756

Patent

active

RE0352683

ABSTRACT:
An exit door security system which employs an electromagnet and armature to lock an exit door comprises an electromagnetic housing and a frame assembly. The housing is pivotally mounted to the frame assembly. An attempt to exit the door causes the housing to pivot to thereby actuate a switch. The lock is automatically released after a pre-established time delay. An alarm at the door may also be actuated by the switch. The electronic circuitry is configured to allow for immediate authorized egress and to implement an immediate safety release of the lock. The lock may be operated in either a normally locked or normally unlocked mode.

REFERENCES:
patent: 4100581 (1978-07-01), Slack
patent: 4720128 (1988-01-01), Logan, Jr.
patent: 4785286 (1988-11-01), Martin
patent: 4803482 (1989-02-01), Verslycken
patent: 4893852 (1990-01-01), Harris

Affiliated with

Also associated with

Rating

Door security system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Door security system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Door security system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-345248