Lever fulcrum

Claim 1

A MECHANICAL BINARY DIGITAL COMPUTER COMPRISING AT LEAST ONE FLAT GENERALLY RECTANGULAR PLATE HAVING A FIRST STABLE POSITION AND A SECOND STABLE POSITION; SET MEANS, HAVING A FIRST SET POSITION AND A SECOND SET POSITION; RESET MEANS, HAVING A FIRST RESET POSITION AND A SECOND RESET POSITION; TWO PAIRS OF LOGIC TABS EXTENDING FROM A LATERAL EDGE OF SAID PLATE; AT LEAST TWO ROTATABLY MOUNTED RODS, EACH SAID ROD DISPOSED IN COOPERATIVE RELATIONSHIP WITH ONE OF SAID TWO PAIRS OF LOGIC TABS, SO AS TO BE OPPOSITE THE FIRST LOGIC TAB OF ITS RESPECTIVE SAID PAIR OF LOGIC TABS WHEN SAID PLATE IS IN SAID FIRST STABLE POSITION AND OPPOSITE THE SECOND LOGIC TAB OF SAID RESPECTIVE PAIR OF LOGIC TABS WHEN SAID PLATE IS IN SAID SECOND STABLE POSITION; SPRING MEANS, CONTINUALLY URGING SAID RODS TOWARD SAID RESPECTIVE LOGIC TAB OPPOSITE EACH SAID ROD; HOLLOW TUBES, MOUNTED ON ONE LOGIC TAB OF EACH SAID PAIR OF LOGIC TAB; EXTENDING FROM SAID PLATE BEYOND SAID LOGIC TAB; CLOCKING MEANS, ADAPTED TO ROTATE SAID RODS AWAY FROM SAID PLATE BEYOND SAID HOLLOW TUBES WHEN SAID PLATE IS BEING DRIVEN FROM SAID STABLE POSITION TO SAID SECOND STABLE POSITION AND FROM SAID SECOND STABLE POSITION TO SAID FIRST STABLE POSITION AND ALLOWING SAID RODS TO ROTATE TOWARD SAID RESPECTIVE LOGIC TABS OPPOSITE EACH SAID ROD WHEN SAID PLATE IS NOT BEING DRIVEN; AND DRIVING MEANS, ADAPTED TO DRIVE SAID PLATE FROM SAID FIRST STABLE POSITION TO SAID SECOND STABLE POSITION WHEN SAID SET MEANS IS IN SAID FIRST SET POSITION AND TO DRIVE SAID PLATE FROM SAID SECOND STABLE POSITION TO SAID FIRST STABLE POSITION WHEN SAID RESET MEANS IS IN SAID FIRST RESET POSITION.