Importance

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Abstract

A mechanism comprising a code wheel assembly including an angularly movable shaft, a first element affixed to said shaft, a second element angularly movable on said shaft, and a third element angularly movable on said shaft, a plurality of main code posts preset for locking the first element and the second element in driving relation, selectively operable means for actuating the main code posts sequentially in a predetermined sense for unlocking the second and first elements, means for limiting angular movement of the second element upon the unlocking of the first and second elements, an auxiliary code post operable in a sense for locking the first element to the third element in driving relation, means for preventing the operation of said auxiliary code post in said locking sense until the actuation of the main code posts sequentially in said predetermined sense to unlock the first and second elements followed by a predetermined angular movement of the first element relative to the second element, control means selectively actuated by angular movement of the third element relative to the second element for performing a control function, and said control means being selectively actuated by said third element following the locking of the first element to the third element by the auxiliary code post and following additional angular movement of said shaft after the first element has been unlocked from the second element.

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First Claim