Patent ID: 8333411

Claim:
An electric strike assembly for releasably retaining a bolt including: a housing, a keeper which in use interacts with the bolt, the keeper being mounted on the housing and being movable relative to the housing from a closed position, locking means including a detent that cooperates with the keeper so that when the detent is retained in an active position the keeper is stopped from being moved from its closed position so that in use the keeper retains the bolt, the locking means including retaining means having locked condition and a released condition, whereby when in the locked condition the retaining means retains the detent in the active position, and when in the released condition the retaining means releases the detent for movement from the active position, the retaining means including a movable member that adopts a first position where the detent is in the active position and moves towards a second position when the detent is moved from the active position, the retaining means also including a stop that obstructs movement of the movable member towards the second position when the retaining means is in the locked condition, and an electrical actuator including a solenoid with a plunger, the plunger being adjustably connectable to the stop so as to allow the locking means to operate in a fail safe mode whereby energization of the actuator causes the retaining means to adopt the locked condition, or after adjustment of the connection of the stop to the plunger to operate in a fail secure mood whereby energization of the actuator causes the retaining means to adopt the released condition, wherein when the retaining means is in the locked condition, urging the keeper to move relative to the housing urges the retaining means to endeavour to adopt the released condition, and wherein when the retaining means is in the released condition the detent is movable from the active position by movement of the keeper relative to the housing from the closed position when releasing the bolt.