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An electronic lock mechanism includes a solenoid driven actuator and a cam actuator ring. The cam ring interfaces with both the latch of a door lock and the door lock key cylinder. With this interfacing, the door latch can be independently operated by one of the key cylinder, the cam actuator ring o

An electronic lock mechanism includes a solenoid driven actuator and a cam actuator ring. The cam ring interfaces with both the latch of a door lock and the door lock key cylinder. With this interfacing, the door latch can be independently operated by one of the key cylinder, the cam actuator ring or a door lock push bar or paddle. With this independent operation, the ability to open a door can be maintained during power or lock mechanism failures for purpose of egress from the area secured by the door lock.

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An electronic lock comprising: a) an electronically actuated driver; b) an actuating hollow cylinder, the hollow cylinder having an inner wall concentric with the axis of the hollow cylinder sized to receive a key cylinder of a stile door lock, said actuating hollow cylinder having at least one prot

An electronic lock comprising: a) an electronically actuated driver; b) an actuating hollow cylinder, the hollow cylinder having an inner wall concentric with the axis of the hollow cylinder sized to receive a key cylinder of a stile door lock, said actuating hollow cylinder having at least one protrusion sized to engage a portion of a latch assembly of said stile door lock, c) a coupling assembly configured to convert longitudinal movement of said electronically actuated driver to rotational movement of said actuating hollow cylinder, said rotational movement causing said at least one protrusion to engage said portion of said latch assembly to retract a latch of said latch assembly.