Keyless combination locks
Electronic combination door lock with dead bolt sensing means
Electrically controlled, electrically encoded push-button combination lock
Cash box provided with a till
Electronic digital combination lock
ApplicationNo. 533893 filed on 06/06/1990
US Classes:70/277, Electrical type (e.g., solenoid)70/303A, Fence held spaced from tumblers70/333RTampering prevention or attach defeating
ExaminersPrimary: Luebke, Renee S.
Assistant: Dino, Suzanne L.
Attorney, Agent or Firm
Foreign Patent References
International ClassE05B 047/00
AbstractAn electronic lock for a safe door is provided with a digital keypad entry device, a mechanical bolt works and associated handle for retracting the door bolts, and a spring biased rotary bolt which engages and precludes operation of the bolt works, such that upon entry of the predetermined code into the entry device, an electric signal causes a solenoid to energize and retract its armature from a blocking position relative the rotary bolt, further enabling the rotary bolt to rotate against its bias in response to mechanical maniupulation of the handle by the user to retract the door bolts. Unauthorized operation of the safe handle causes the rotary bolt to be locked into a fixed position, preventing entry into the safe.
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