Integrated alarm and access control system

Details Integrated alarm and access control system Integrated alarm and access control system

1990-01-11

1991-03-26

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

49 14, 49506, 340506, 340528, G08B 1308

Patent

active

050032909

ABSTRACT:
An integrated alarm and access control system includes an access control package, an intrusion detection package and an interface unit. A position sensor determines if a door is open or closed and an electrically activated locking device locks the door in its closed position. A supervisory circuit provides line security. A door position relay and a first timer prevent an alarm signal from the supervisory circuit if the door is open and the egress device is actuated for a time period. A door control relay activates locking devices and a second timer responds to the door control relay, the egress device and the door position relay to give a prealarm signal. Fail-safe and fail-secure circuits are included.

REFERENCES:
patent: 4283710 (1981-08-01), Genest et al.
patent: 4375637 (1983-03-01), Desjardins
patent: 4803482 (1989-02-01), Verslycken

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