Clearance, rake angle, and stroke length adjusting means for power shears

Claim 1

IN A SHEAR FOR CUTTING MATERIAL OF DIFFERENT THICKNESSES, A FRAME, A SUPPORT MEMBER MOUNTED IN SAID FRAME AND ADAPTED TO SUPPORT A FIRST KNIFE MEMBER, AN ELONGATED MEMBER MOVABLE IN SAID FRAME THROUGH A CYCLE OF OPERATION WHICH INCLUDES MOVEMENT THROUGH A WORK STROKE AND A RETURN STROKE, SAID ELONGATED MEMBER BEING ADAPTED TO CARRY A SECOND KNIFE MEMBER INCLINED AT A RAKE ANGLE TO A FIRST KNIFE MEMBER ON SAID SUPPORT MEMBER AND IN POSITION TO COOPERATE WITH A FIRST KNIFE MEMBER ON SAID SUPPORT MEMBER TO SHEAR MATERIAL PLACED THEREBETWEEN POWER MEANS CONNECTED TO SAID ELONGATED MEMBER FOR MOVING SAID ELONGATED MEMBER THROUGH SAID CYCLE OF OPERATION, AND MEANS FOR CHANGING THE RAKE ANGLE OF A SECOND KNIFE MEMBER MOUNTED ON SAID ELONGATED MEMBER SIMULTANEOUSLY CHANGING THE LENGTH OF SAID WORK AND RETURN STROKES.