Abstract: The electric lock of the present invention comprises two sets of contact assemblies mounted within a housing, one of the sets being responsive to a master key, and the other being responsive to a pass key for opening the lock. The assemblies each comprise a set of opening contacts corresponding to the protrusions on the keys and a set of alarm contacts positioned to set off an alarm in the event the wrong key is used or in the event an attempt is made to pick the lock.

Abstract: An electrical lock assembly which includes within a lock housing a set of flexible electrical key contacts and a set of electrical unlock contacts mounted in the lock housing and located proximate to the key contacts. A key directly engages the flexible key contacts and presses them directly against the unlock contacts thereby completing an electrical circuit between the key contacts and the unlock contacts. An unlock circuit means electrically connected to the unlock contacts is responsive to the completion of a circuit between the key contacts and the unlock contacts. In another embodiment the lock assembly includes flexible alarm contacts which are pressed against a second set of alarm contacts to activate an alarm circuit when an improper key is employed.