Abstract: A sliding deadbolt for use with an exit alarm lock having deadbolt guide supports which are closer to the centerline of the deadbolt than the point at which the exit alarm lock drivers contact the deadbolt to move the deadbolt between a retracted position and an extended position. By placing the guide supports closer the deadbolt centerline, the resistive forces between the deadbolt and the support/bolt contact points as a result of loads on the deadbolts (such as from the exit alarm lock drives), are reduced.

Abstract: An improved exit alarm lock including a push pad moveable between an extended position and a depressed position; a pivotable first bell crank, a first end of the first bell crank being connected to a first end of the push pad; a pivotable support connected to a second end of the push pad; and a deadbolt moveable between a retracted position and an extended position, a second end of the first bell crank directly engaging the deadbolt, whereby when the push pad is moved to the depressed position, the push pad pivots the first bell crank, the first bell crank second end contacts the deadbolt and moves the deadbolt from the extended position to the retracted position.

Abstract: A switching assembly for use with an exit alarm lock. The switching assembly uses two reed switches which must both be closed for the alarm horn to sound. An arm/disarm switch is operated by a magnet on a pivotable switch link which is operated by a link boss on rotatable deadbolt cams which are operated by the key cylinders. An alarm switch is operated by a magnet in the deadbolt.