Ilco Unican Corporation

Walter R Evans

An improved combination lock, such as for a safe, for the lock type having a plurality of tumbler wheels mounted coaxially with a driving cam, the tumbler wheels having fence gates to be aligned by proper combination dialing, the driving cam having a cam gate for reception of a fence nose on a fence lever when the combination is dialed, the fence lever normally biased to hold the fence and the fence lever nose in an elevated position with respect to the cam and the tumbler wheels but having an override spring which during an arc portion of each full revolution of the dial biases the fence lever in a downward engaging position against the tumbler wheels and which will engage the fence nose with the cam gate if the correct combination is dialed. A J-shaped wire spring is provided extending between the pivot point of the cam lever attachment to the latch and extending around the cam and engageable by an orbital roller mounted on the cam surface to initiate the reverse, downward bias of the cam lever once per revolution.

Growing community of inventors

King, NC, United States of America

Walter R Evans