Combination lock system

A combination lock system comprising a set of push-buttons that can be actuated in compliance with a combination, a set of series of coders, in which each series is associated with a push-button, incrementing means for placing the coders of each series successively in a position to be operated by actuating a push-button, coding means for defining a waiting configuration of the coders in which the coders selected for the combination occupy a coding position and the coders not selected for the combination occupy an inactive position, actuation of the locking means of the lock being possible if the selected coders have been operated by actuating push-buttons in compliance with the combination, the system further comprising means for returning the coders to the waiting configuration after actuation of the push-buttons, and means for authorizing two actuation strokes of the push-buttons, namely a normal stroke and a coding stroke, the normal stroke being such that a push-button actuated over that stroke causes the movement of a selected coder from its coding position to a non-locking position or the movement of an unselected coder from its inactive position to a locking position preventing unlocking, while the coding stroke is such that a push-button actuated over that stroke causes a coder to be moved from its inactive position to its coding position, and the system further comprising means which, to enable entry of a new coded combination, place all the coders in the inactive position and authorize actuation of the push-buttons over their coding stroke.