Closure fasteners – Bolts – Emergency operating means
Patent
1991-07-01
1992-08-18
Moore, Richard E.
Closure fasteners
Bolts
Emergency operating means
292 36, 292 21, E05C 904
Patent
active
051392925
ABSTRACT:
An alarm lock for securely locking both edges of an emergency exit door. A rigid, hollow housing mounts upon an existing door between opposing door facings. A pair of rigid, elongated rods is longitudinally displaceable within the housing between a locked position and an unlocked position. The rods are driven by a coupler confined within the housing and coupled to a rotatable crank controlled by a paddle arm handle assembly. The crank is journaled for rotation about a rigid axle which projects through the housing interior. Movement of the handle rotates the crank, selectively extending and retracting the rods into and out of engagement with the door casings. A panel mounted on the paddle arm clearly displays instructions for emergency use. When the handle is activated, a rigid follower associated with one of the rods forcibly contacts an alarm switch to activate an audible transducer. The alarm may be manually disarmed and reset by manipulation of a key switch. The handle assembly and alarm assembly are secured within rigid casings to prevent tampering or destruction.
REFERENCES:
patent: 2674480 (1954-04-01), Vigmostad
patent: 3314703 (1967-04-01), Fitzpatrick
patent: 3724130 (1973-04-01), Bogue
patent: 4271691 (1981-06-01), Logan
patent: 4387917 (1983-06-01), Cocker
patent: 5010747 (1991-04-01), Norden, Jr.
Carver Stephen D.
Moore Richard E.
Ralph's Welding Inc.
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