Combination lock

A combination lock comprising:

• a plurality of push buttons actuatable through an actuation stroke between first and second positions;
• first counter means for counting actuation strokes including a respective first movably mounted member movable from an initial position to successive unique positions in response to successive actuation strokes;
• second counter means for counting actuation strokes including a respective second movably mounted member movable from an initial position to successive unique positions in response to successive actuation strokes;
• combination setting means for connecting selected ones of said push buttons to said first counter means to enable counting by said first counter means of the actuation strokes of said selected push buttons and for connecting the non-selected ones of said push buttons to said second counter means to enable counting by said second counter means of the actuation strokes of said non-selected push buttons;
• third counter means responsive to each actuation stroke of said selected and non-selected push buttons for counting the actuation strokes thereof and including a respective third movably mounted member movable from an initial position to successive unique positions in response to each successive actuation stroke of said selected and non-selected push buttons;
• and
• interlock means movable from an initial position to a second position when said first counter means counts a predetermined number of push button actuation strokes of said selected push buttons, said second counter means has not counted actuation strokes of said non-selected push buttons, and said third counter means has counted a predetermined number of actuation strokes of said selected and non-selected push buttons.

A combination lock, comprising:

• a plurality of push buttons actuatable between first and second positions, each of said push buttons having first and second force transmitting surfaces;
• a plurality of interposers movably mounted on an interposer support and movable to a first position for engagement by a first force transmitting surface and to a second position for engagement by a second force transmitting surface of an associated push button;
• first and second movably mounted actuation panels, said first actuation panel positioned to be actuated by interposers in their respective first positions and said second actuation panel positioned to be actuated by interposers in their respective second positions;
• first and second pawl means carried, respectively, by said first and second actuation panels;
• first and second rachet means for incrementing, respectively, by said first and second pawl means upon actuation of an associated panel by an interposer;
• actuation counter means coupled to said push buttons for counting the actuations of said push buttons;
• interlock means movable between a first position to a second position, said actuation counter means urging said interlock means to its second position in response to a predetermined count;
• and
• said first and second rachet means carrying stopping means for preventing said interlock means from moving to said second position in response to an incrementing of said second rachet means.