Elektronisches Kombinationsschloß mit Wählscheibeneingabe

摘要

An electronic combination lock has a dial-shape handle (10) with a keypad (18) incorporated in it so as to give an indication of a rotated condition of the handle into or out of a bolt actuated or retracted position. Rotation of the handle (10) extends or retracts a bolt (50) that closes or opens the lock. The keypad (18) includes indicia (30) that give the user visual cues as to the orientation of the handle (10), thereby informing the user of the extended or retracted condition of the bolt (50). A battery pack (16) is used to energize circuitry that recognizes a code entered through the keypad (18). The circuitry provides a control signal that activates a solenoid to extend or retract a bolt blocking device, which in turn prevents or enables movement of the bolt (50). A visual indicator (68) warns of a low voltage or power condition in the battery pack (16). Electrical contacts (66) are provided in the face plate of the handle (10) to connect the circuitry to an external power source in case the battery pack (16) fails.