Mechanical torque limiters to improve machine safety; pneumatic clutches for use with machines; couplings for use with mechanical transmission connections; adjustable pulleys being parts of machines; motor-slide bases for use in the adjustment of machinery; and components of automatic assembly line machines, namely, couplings, clutches, pulleys, and torque limiters

[ MACHINE GEARS IN GENERAL, ] MACHINE COUPLINGS, TORQUE LIMIT OR FOR MACHINES, [ MACHINE CONNECTING RODS, ] LINKS AND CLUTCHES, AND PARTS OF THE AFORESAID