CROSSHEAD FOR SABRE SAWS AND SABRE SAWS INCORPORATING SAME

摘要

CROSSHEAD FOR SABRE SAWSAND SABRE SAWS INCORPORATING SAMEABSTRACTA crosshead for a scotch yoke mechanism is formedfrom a generally rectangular blank of sheet steel providedwith a generally oval, straight sided opening extendinggenerally transversely medially thereof and a pair ofgenerally circular openings centered and spaced apartfrom each of the oval opening straight sides, the blankbeing formed, as on a four slide forming machine generallyaround two generally parallel lines each being generallyextensions of the oval opening straight sides to providetop and bottom generally parallel panels defining aclosed end guide track having parallel sides and posi-tioning the generally circular openings in the top andbottom panels and in line to be threaded on a generallycylindrical tubular saw bar of a sabre saw, the blankbeing further formed to tubular configuration of generallyrectangular cross-section by two further parallel bendsclosing the crosshead on a fourth side on the side ofthe saw bar opposite the guide track opening. The cross-head is pivotally mounted on the saw bar, a pair of lowmass snap or clinch rings disposed in annular grooveson the saw bar on opposite sides of the crosshead adjacentthe top and bottom panels.