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US 4,551,707 AGranted
Fire alarm pull station
AssigneeEmhart Industries, Inc.
InventorRoger A. Simpson
Life of this patent
Estimating the term…
Abstract
In order to pull a fire alarm door to actuate an alarm, a complimentary door must first be pushed in so as to permit an operator to pull the fire alarm door.
Claims6
A double action alarm station comprising:
- (a) a frame,
- (b) a back plate carried by said frame providing a compartment,
- (c) latch means carried by said back plate,
- (d) a first door pivotally mounted at an end of said frame to be manually pushed inwardly and partially covering a side opposite said back plate,
- (e) a second door pivotally mounted at an opposite end of said frame to be manually pulled outwardly after pushing said first door inwardly and covering the remainder of said side,
- (f) cam means carried by said second door engaging said latch means, and
- (g) a switch closing in response to an opening of said second door and having a terminal block receiving electrical wiring from an alarm to complete an electrical circuit thereto.
4 more elements
Dependencies are inferred from the claim text.