Adjustable drive cam for typewriters

Claim 1

A DRIVE CAM FOR A TYPE ACTION, COMPRISING A FIRST PART HAVING A FIRST SURFACE; A SECOND PART HAVING A SECOND SURFACE, SAID FIRST AND SECOND SURFACES TOGETHER FORMING A COMPOSITE ELONGATED CAM FACE HAVING OPPOSITE FREE ENDS WITH SAID FIRST SURFACE LEADING SAID SECOND SURFACE IN THE LONGITUDINAL DIRECTION OF SAID COMPOSITE CAM FACE, SAID SURFACES HAVING SAME WIDTH, ONE OF SAID PARTS HAVING A RECESS AND A CENTRAL RECTANGULAR RECESSED SURFACE PORTION AND THE OTHER PART HAVING A PROJECTION PROJECTING INTO SAID RECESS AND HAVING A CENTRAL RECTANGULAR PROJECTING SURFACE PORTION HAVING THE SAME TRANSVERSE WIDTH AS SAID RECESSED SURFACE PORTION AND PROJECTING INTO THE SAME; THREADED ADJUSTING MEANS FOR GRADUALLY ADJUSTING THE RELATIVE POSITION OF SAID FIRST AND SECOND PARTS AND INCLUDING A SCREW PASSING THROUGH SAID SECOND PART AND BEING THREADED INTO SAID FIRST PART SO THAT THE SAME ARE HELD IN DIFFERENT RELATIVE POSITIONS IN WHICH THE DISTANCE BETWEEN SAID OPPOSITE FREE ENDS AND THEREWITH THE LENGTH OF SAID COMPOSITE CAM FACE IS DIFFERENT SO THAT DIFFERNT AMOUNTS OF ENERGY ARE TRANSFERRED TO SAID DRIVE CAM FROM A POWER ROLL ENGAGING SAID COMPOSITE CAM FACE ALONG THE LENGTH THEREOF; AND A SUPPORT HAVING AN ARM HAVING A FIRST PORTION LOCATED IN SAID FIRST PART AND A SECOND PORTION LONGITUDINALLY PROJECTING FROM SAID FIRST PART AND SLIDABLY ENGAGING SAID SECOND PART FOR GUIDING THE SAME IN LONGITUDINAL DIRECTION AND FOR PREVENTING TRAVERSE DISPLACEMENT OF THE SAME.