Driving mechanism for transfer finger of bolt forming header

Claim 1

A driving mechanism for a transfer finger of a bolt forming header comprising: a base frame; a drive shaft rotatably mounted on said base frame; a cylindrical holder fixedly mounted on said drive shaft; a pair of clutch cylinders mounted on said cylindrical holder, said clutch cylinders being rotatable with said cylindrical holder and each having serrations at one end thereof and recessed and ridged portions at the other ends thereof; a pair of cams mounted on said cylindrical holder having abutting faces, said cams having serrations adapted to engage with the serrations formed on said clutch cylinders; a pair of clutches mounted on both ends of said cylindrical holder, said clutches having recessed and ridged portions engageable with the recessed and ridged portions of said clutch cylinders, said pair of clutches being drivenly coupled to said drive shaft for rotation therewith, wherein in a first position said recessed and ridged portions of said pair of clutch cylinders are matingly engaged with said recessed and ridged portions of said pair of clutches and said clutch cylinders drive said pair of cams, and in a second position said recessed and ridged portions of said pair of clutch cylinders are out of mating engagement with said recessed and ridged portions of said pairs of clutches and said pair of cams are free for relative rotation; a first lever pivotally mounted about a pin on said base frame, said first lever having a cam follower at one end thereof, said cam follower following the profile of said pair of cams and thereby causing pivotal movement of said first lever; and a second lever pivotally mounted about the pin and being pivoted by operative engagement with said first lever, said second lever being provided with said transfer finger at one end thereof.