Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1984-10-02
1986-12-23
Rowland, James L.
Communications: electrical
Condition responsive indicating system
Specific condition
292 21, 292 92, 340693, G08B 1308, E05B 6510
Patent
active
046315284
ABSTRACT:
An emergency exit device of the push bar type to control entry and exit of personnel, including a crossbar which may be pushed toward a door to actuate mechanisms which retract a latch bolt, and an alarm and key system for selective alarm actuation. The alarm and key system includes internal control mechanisms which are mounted in a tamper-proof housing, which may be accessed only by operating the push bar and actuating the alarm. A light emitting diode in the alarm assembly indicates alarm state, the presence of power, and a preset delay interval for alarm actuation. A variety of internal and external key operation configurations may be employed. A fastening arrangement for the exit device housing provides security against unauthorized manipulation of alarm components. Where mounting the alarm assembly within the exit device frame, an internal mounted guard member may include a protection flange to block access to the alarm.
REFERENCES:
patent: 3435643 (1969-04-01), Pollak et al.
patent: 4006471 (1977-02-01), Pappas
patent: 4081980 (1978-04-01), Hightower
Handel Martin G.
Robida James E.
Slusarski Ronald S.
Capati Anne Marie F.
Deutsch Barry E.
Emhart Industries Inc.
Rowland James L.
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