Abstract: A coded lock assembly is introduced in order to improve upon existing coded locks used to control access to protected areas. The lock assembly contains several micro-switches within the anterior portion that can be pushed by a push button on the posterior portion of the lock assembly. In order to unlock the lock assembly, the user must turn an exterior drive handle to the proper position and press the push button. A predetermined sequence of handle turns and push button presses is required to unlock the lock.

Abstract: A coded lock assembly is introduced in order to improve upon existing coded locks used to control access to protected areas. The lock assembly contains several micro-switches within the anterior portion that can be pushed by a push button on the posterior portion of the lock assembly. In order to unlock the lock assembly, the user must turn an exterior drive handle to the proper position and press the push button. A predetermined sequence of handle turns and push button presses is required to unlock the lock.

Abstract: A combination lock, particularly a domestic door lock, comprises a rotatable and axially movable plunger, a plurality of axially displaceable pins disposed around the plunger, a rotary ward disc carried by the plunger and co-operating with slots in said pins to allow rotary movement of the plunger only when selected ones of the pins are axially displaced, relative to the remainder, to have slots therein aligned with the ward disc, and a member carried by the plunger and capable of moving the pins to an aligned position upon axial movement of the plunger. A user can move said selected ones to render the plunger turnable to open the door and then easily pull or push the plunger to cause said member to re-align the pins to prevent the selected pins remaining depressed and the "combination" visible.