ApplicationNo. 06/330694 filed on 12/14/1981
US Classes:70/312, Manually operable70/314, Combination upsetting70/316Compound tumblers
ExaminersPrimary: Smith, Gary L.
Assistant: Gall, Lloyd A.
Attorney, Agent or Firm
International ClassesE05B 37/00 (20060101)
E05B 37/02 (20060101)
AbstractA multi-dial combination lock is provided with a security feature whereby the dials are rotated when the lock is opened in order to upset the on-combination setting of the dials. Each dial has a heart-shaped cam and a cam operator is provided including followers for the respective cams. When the lock is set on-combination, and an actuator is moved manually in order to open the lock, the actuator also works the cam operator so as to apply pressure to the cam formations on the respective dials effective to rotate each of the dials into a set orientation. In the set orientation to which the dials are rotated, each dial may be orientated so as to display the same combination indicium, e.g. "0". The lock also includes a shift member for changing the set combination of the dials, the shift member being situated in a pocket formed in the manual actuator.