Emergency exit latch

Details Emergency exit latch Emergency exit latch

1975-03-21

1977-01-11

Caldwell, John W.

Communications: electrical

Systems

Call station

340 52R, 200 6168, 180112, G08B 1308

Patent

active

040030474

ABSTRACT:
An emergency exit latch is disclosed for locking and unlocking a portal such as a window or door and sending a signal to a remote point when the portal has been unlocked. The latch includes a latch operator which is rotatably mounted on the portal. The latch operator includes a tang which is integral with the operator and performs a locking function by mating with means associated with the frame when the latch operator is rotated into the locked position. When the operator is put in the locked position, the tang also actuates a switch. Thus, when the operator is rotated out of the locked position, the switch changes state and provides an indication that the door is no longer properly locked. In the preferred embodiment, the design of the exit latch is such that the switch will change state even before the window has become completely unlocked.

REFERENCES:
patent: 3005065 (1961-10-01), Jellies
patent: 3415961 (1968-12-01), Barnard
patent: 3603958 (1971-09-01), Wahlberg
patent: 3746382 (1973-07-01), Hancock

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