Pneumatically operated fastener driving machines

Claim 1

IN A PNEUMATICALLY OPERATED FASTENER DRIVING MACHINE INCLUDING A FASTENER DIRECTING NOSE STRUCTURE AND A PNEUMATIC MOTOR HAVING A DRIVER ACTUATED THEREBY FOR DRIVING FASTENERS FROM SAID NOSE STRUCTURE, MEANS TO SUPPLY PNEUMATIC FLUID TO DRIVE SAID MOTOR, MEANS TO CONTROL DELIVERY OF PNEUMATIC FLUID TO SAID MOTOR INCLUDING A PNEUMATIC FLUID PASSAGEWAY SYSTEM PROVIDED WITH A DIGITALLY CONTROLLABLE VALVE, A DISABLING VALVE IN SAID PASSAGEWAY SYSEM INCLUDING A SAFTETY TRIGGER ASSOCIATED WITH SAID NOSE STRUCTURE AND DISPOSED TO BE OPERATED BY ENGAGEMENT WITH A WORKPIECE IN ADVANCE OF ENGAGEMENT OF THE WORKPIECE BY THE NOSE STRUCTURE SO THAT SAID DISABLING VALVE WILL BE OPERATED TO CLEAR SAID PASSAGEWAY SYSTEM FOR CONTROL BY SAID DIGITALLY OPERABLE VALVE TO EFFECT OPERATION OF SAID PNEUMATIC FLUID DELIVERY CONTROL MEANS, THE IMPROVEMENT COMPRISING: COMBINATION STOP AND INTERLOCK MEANS INCLUDING A SHOULDER MEMBER HAVING INTERCHANGEABLE OPERATIVE POSITIONS AND MEANS FOR FIXEDLY MAINTAINING THE SHOULDER MEMBER IN EITHER OF SAID POSITIONS, SAID SHOUDER MEMBER BEING OPERATIVE IN ONE OF SAID POSITIONS TO STOP THE DISABLING VALVE IN ONE OF A PLURALITY OF NORMALLY OPERATIVE POSITIONS OF THE DISABLING VALVE, AND SAID SHOULDER MEMBER BEING OPERATIVE IN THE OTHER OF ITS POSITIONS TO INTERLOCK THE DISABLING VALVE IN A NON-OPERATING POSITION WHEREIN SAID PASSAGEWAY SYSTEM IS CLEARED FOR CONTROL AT WILL BY SAID DIGITALLY OPERABLE VALVE.