Coupling with shear pin

Claim 1

A CAM AND CAM FOLLOWER ACTUATING MECHANISM FOR SHEAR PIN COUPLINGS COMPRISING, IN COMBINATION: A SHAFT, A FIRST CAM MEMBER ROTATABLY MOUNTED ON SAID SHAFT; A SECOND CAM MEMBER FIXED TO SAID SHAFT ADJACENT SAID FIRST CAM MEMBER, SAID FIRST AND SECOND CAM MEMEBRS EACH HAVING A HOLE OF EQUAL DIAMETER SPACED OUT FROM THEIR RESPECTIVE CENTERS OF ROTATION AND CAPABLE OF ALIGNMENT WITH EACH OTHER, SAID FIRST CAM MEMBER CONNECTED TO POWER INPUT AND THE SECOND CAM MEMBER LOAD CONNECTED; A SHEAR PIN INTERCONNECTING SAID CAM MEMBRS, SAID SHEAR PIN OF NEARLY EQUAL DIAMETER AND RESIDING EQUALLY IN EACH SAID HOLDE, WHEREBY SAID SHEAR PIN WHEN INTACT AND RESIDING IN EACH SAID HOLE CAUSES SAID FIRST CAM MEMBER AND SAID SHAFT TO TURN TOGETHER AND WHEN SAID SHEAR PIN TO SEVERED BY SAID FIRST CAM MEMBER ROTATED IN RESPECT TO SAID SECOND CAM MEMBER BY A PREDETERMINED OVERLOAD CAUSES THE FIRST AND SECOND CAM MEMBER TO ROTATE IN RESPECT TO EACH OTHER; EACH SAID CAM MEMBER HAVING A HIGH DWELL OF APPROXIMATELY 180 DEGRESSS DISPLACED FROM DWELL, SAID HIGH DWELLS BEING 180 DEGRESS DISPLACED FROM EACH OTHER WHEN SAID SHEAR PIN IN INTACT, AND IS SIDE BY SIDE RELATION; A FIRST CAM FOLLOWER POSITIONED RAIDALLY OUTWADLY OF SAID SHAFT AND WITH ONE END AND LYING IN THE PLANE DEFINED BY THE SURFACES OF SAID CAMS ADJACENT TO EACH OTHER AND IN CONTACT WITH ARE OF SAID CAM MEMBERS, AND A SECOND CAM FOLLOWER POSITIONED RADILLY OUTWARDLY OF SAID SHAFT AND ABOUT 180 DEGREES REMOVED FROM SAID FRIST CAM FOLLOWER, SAID SECOND CAM FOLLOWER LYING IN THE PLANE DEFINEDBY THE SURFACES OF SAID CAMS ADJACENT TO EACH OTHER AND HAVING ONE END IN CONTACT WITH THE OTHER OF SAID CAM MEMBERS; BIASING MEANS ATTACHED TO EACH SAID CAM MEMBERS; EACH SAID CAM FOLLOWERS TO CONTACT SAID CAM MEMBERS; EACH SAID CAM FOLLOWER HAVING A RETRACTED AND PORJECTED POSITION, THE CAM FOLLOWERS BEING IN RETRACTED POSITION WHEN CONTACTING THE HIGH DWELL OF EITHER OF SAID CAM MEMBERS, SAID CAM FOLLOWERS BEING IN RETRACTED POSITION AT ALL TIMES WHEN SAID SHEAR PIN IS INTACT, AND AT LEAST ONE OF SAID CAM FOLLOWERS BEING AT LEAST TEMPORARILY IN PROJECTED POSITION WHEN SAID SHEAR PIN IS SEVERED AND SAID CAM MEMBERS ROTATE IN RESPECT TO EACH OTHER TO A POSITION IN WHICH SAID HIGH DWELLS ARE LESS THAN 180 DEGREES APART RELATIVE TO EACH OTHER.