Combination lock

Claim 1

IN A COMBINATION LOCK WHICH IS OPENED BY FOLLOWING A PRESET COMBINATION, BOLT ACTUATOR MEANS, CONTROL MEANS FOR OPERATING SAID BOLT ACTUATOR MEANS, BLOCKING MEANS ASSOCIATED WITH SAID CONTROL MEANS AND MOVABLE RELATIVE TO THE LATTER INTO AND OUT OF A BLOCKING POSITION IN WHICH IT BLOCKS SAID CONTROL MEANS FROM OPERATING SAID BOLT ACTUATOR MEANS, SETTING MEANS MOVABLE BETWEEN A FIRST POSITION FOR ENGAGING SAID BLOCKING MEANS AND MOVING IT OUT OF ITS BLOCKING POSITION AND A SECOND POSITION FOR NON-ENGAGEMENT WITH SAID BLOCKING MEANS, MEANS FOR SHIFTING SAID SETTING MEANS TO ITS FIRST POSITION WHEN SAID CONTROL MEANS AND SAID BLOCKING MEANS HAVE BEEN DISPLACED IN ONE DIRECTION RELATIVE TO SAID SETTING MEANS TO A PREDETERMINED INITIAL POSITION, MEANS DEFINING A TORTUOUS PATH FOR RELATIVE DISPLACEMENT BETWEEN (1) SAID SETTING MEANS AND (2) SAID CONTROL MEANS AND ITS ASSOCCIATED BLOCKING MEANS, SAID PATH EXTENDING IN ONE DIRECTION FROM AN INITIAL POINT TO A TERMINAL POINT AT WHICH SAID BLOCKING MEANS AND SAID SETTING MEANS ARE ENGAGEABLE WHEN THE SETTING MEANS IS IN ITS FIRST POSITION BUT NON-ENGAGEABLE WHEN THE SETTING MEANS IS IN ITS SECOND POSITION, MEANS FOR SELECTIVELY ADJUSTING SAID PATH DEFINING MEANS TO CHANGE SAID PATH AND THEREBY CHANGE SAID COMBINATION, MEANS FOR EFFECTING RELATIVE DISPLACEMENT OF SAID SETTING MEANS AND SAID CONTROL MEANS ALONG SAID PATH WITHOUT DISTURBING SAID SETTING MEANS IN ITS SAID FIRST POSITION TO BRING SAID BLOCKING MEANS AND SAID SETTING MEANS INTO ENGAGEMENT TO MOVE SAID BLOCKING MEANS OUT OF ITS BLOCKING POSITION SO THAT SAID CONTROL MEANS IS FREE TO OPERATE SAID BOLT ACTUATOR MEANS.