Control mechanism for flying shears

Claim 1

A CONTROL MECHANISM FOR FLYING SHEARS INCLUDING A FRAME MOUNTED FOR VERTICAL RECIPROCATING MOVENENT AND FOR OSCILLATION ABOUT A HORIZONTAL AXIS, AN UPPER CUTTING BLADE CARRIED BY SAID FRAME, A LOWER CUTTING BLADE SUPPORT SLIDABLY MOUNTED ON SAID FRAME FOR MOVEMENT TOWARD AND AWAY FROM SAID UPPER BLADE AND A LOWER CUTTING BALDE MOUNTED ON SAID SUPPORT FOR COOPERATION WITH SAID UPPER BLADE TO SHEAR A STRIP OF MATERIAL DISPOSED BETWEEN SAID BLADES, SAID CONTROL MECHANISM COMPRISING A CRANKSHAFT HAVING A FIRST PAIR OF CRANKS, ROTATBLY CONNECTED TO SAID FRAME FOR RECIPROCATTING THE SAME AND A SECOND PAIR OF CRANKS ANGULARLY SPACED ONE HUNDRED EIGHTY DEGREES FROM SAID FIRST CRANKS, A SHAFT ROTATABLY MOUNTED ON SAID SUPPORT, A PAIR OF ECDENTRIES ON SAID SHAFT, CONNECTING RODS CONNECTING SAID ECCENTRIES AND SAID SECOND CRANKS AND MEANS MOUNTED SOLELY ON SAID SUPPORT TO ROTATE SAID SHAFT FROM ONE POSITION TO A SECOND POSITION ANGULARLY SPACED ONE HUNDRED EITHTY DEGREES FROM SAID FIRST POSITION, WHEREBY WITH SAID SHAFT IN SAID FIRST POSITION ROTATION OF SAID CRANKSHAFT WILL MOVE SAID BLADES INTO SHEARING RELATIONSHIP AND UPON ROTATION OF SAID SHAFT TO SAID SECOND POSITION AND ROTATION OF SAID CRANKSHAFT SAID LOWER BALDE WILL RECIPROCATE IN SPACED INOPERATIVE RELATIONSHIP TO SAID UPPE BLADE.