Abstract: In a first aspect, an electronic lock suitable for replacing interchangeable core locks has a solenoid assembly longitudinally aligned parallel to the rotational axis of the cylinder of the lock. In a second aspect an electronic lock has a ferromagnetic enclosure that surrounds at least a portion of a solenoid assembly when the cylinder of the lock is free to rotate.

Abstract: The present invention is directed at an electronic lock assembly which uses a simplified locking mechanism, which is operable by a suitably programmed electronic key. The invention is directed to a cylinder type locking mechanism wherein a solenoid and plunger is provided to electronically lock and unlock a key cylinder, thereby allowing rotation of he key cylinder for unlocking of a locking mechanism when a suitably programmed electronic key is used in connection with the mechanism. A side bar and retaining spring engage the cylinder plug to prevent rotation thereof in the locked position with the side bar contacted by the plunger of the solenoid to prevent the side bar from moving until an authorized key is used to unlock the mechanism.

Abstract: A key assembly for mounting an electronic component in the head of the key. The electronic component is mounted in either an opening such as a bore or recess formed in the key head, or a carrier connected to the heel end of the key shank. In the former case, a closure member such as a plug or adhesively backed panel member is employed to close off the opening. In the latter case, the carrier is encapsulated within a plastic key head.

Abstract: A locking device including at least one key and a lock cylinder having at least one cylinder core pivotally mounted in a cylinder housing and having a keyway is provided with a blocking element which in its blocked position prevents rotation of the cylinder core with the key, and in its release position permits rotation of the cylinder core with the key. Further provided are an actuator which blocks the blocking element in the blocked position and releases it in the release position, and an electronic code transmitter in the key and an electronic code evaluator which controls the actuator. The lock cylinder is provided with a cylinder armor having an armor housing covering the cylinder housing and an armor disk pivotally mounted therein with a key insertion slot flush with the keyway of the cylinder core. The blocking element and the actuator are disposed in the armor housing. In its blocked position the blocking element acts on the armor disk so as to prevent rotation, releasing it in the release position.

Abstract: A cam assembly may be constructed with lock cylinder perforated by a centrally positioned keyway, and having an exposed circumferential surface surrounding the keyway rotatably fitted within a centrally positioned keyhole of a housing, and rotated within the centrally positioned keyhole in response to rotational force applied by a key conformingly corresponding to the lock cylinder through an arc. A cam is positioned within the housing to rotate with the lock cylinder as the key conformingly corresponding to the lock manually applies a rotational force to the lock cylinder rotates through the arc, while a member attached to the cam and eccentrically positioned relative to the keyway, drives the bolt between extended and retracted positions as the lock cylinder rotates through the arc. An electronic circuit containing a memory and a microprocessor, is mounted upon and supported by the cam to rotate with the cam through the arc.

Abstract: A dielectric D-ring of the type having a hook receiving opening at one end and a strap or cable receiving opening at the other. The dielectric D-ring comprises a D-ring blank encased within a dielectric injection molded plastic shell. The blank has a plurality of plastic receiving holes therethrough that receive plastic when the dielectric plastic shell is injection molded about the blank. The plastic filled holes assist in holding together the portions of the plastic shell situated on opposite sides of the blank.