Explosive power assisted hammer driven tool

Claim 1

IN AN EXPLOSIVE POWER ASSISTED HAMMER DRIVEN TOOL FOR DRIVING AN ELEMENT SUCH AS A NAIL, PIN OR STUD INTO MATERIAL, AND HAVING A BODY WITH A CYLINDRICAL BORE THERETHROUGH, A CARTRIDGE PLUNGER AND A DRIVE PLUNGER SLIDABLY MOUNTED IN SAID BORE AND ADAPTED FOR INDEPENDENT RECIPROCATING MOVEMENT THEREIN, ONE END OF SAID CARTRIDGE PLUNGER EXTENDING OUT OF ONE END OF SAID BORE AND BEING ADAPTED TO BE HAMMER DRIVEN TOWARDS THE DRIVE PLUNGER, THE DRIVE PLUNGER BEING MOVABLE TOWARD THE OTHER END OF SAID BORE FOR ONLY A LIMITED DISTANCE AND HAVING AN ABUTTING SURFACE AT THE ONE END THEREOF OPPOSED TO SAID CARTRIDGE PLUNGER FOR FIRING A CARTRIDGE UPON PERCUSSIVE CONTACT OF THE DETONATOR END THEREOF WITH THE SAID ABUTTING SURFACE AND BEING ADAPTED AT ITS OTHER END TO OPERATIVELY ENGAGE THE ELEMENT TO BE DRIVEN; THAT IMPROVEMENT COMPRISING A CARTRIDGE HOLDING MEANS ON THE OTHER END OF SAID CARTRIDGE PLUNGER AND ADAPTED TO HOLD A CARTRIDGE THEREIN IN A FULLY INSERTED POSITION SUCH THAT THE CARTRIDGE HAS ITS DETONATOR END EXTENDING TOWARD THE DRIVE PLUNGER A SHORT DISTANCE FROM SAID OTHER END OF THE CARTRIDGE PLUNGER WITH THE RIM OF THE CARTRIDGE SPACED FROM AND COMPLETELY CLEAR OF AND UNSUPPORTED BY THE CARTRIDGE PLUNGER, WHEREBY ONLY WHEN AN ELEMENT IS OPERATIVELY ENGAGED IN THE DRIVE PLUNGER AND DISPOSED AGAINST THE WORKPIECE AND THE CARTRIDGE PLUNGER IS HAMMER DRIVEN WITH SUFFICIENT FORCE TO CAUSE THE EXTENDING PORTION OF THE CARTRIDGE TO BE CRUSHED AND THEREAFTER DRIVE THE DETONATOR END OF THE CARTRIDGE INTO CONTACT WITH SAID ABUTTING SURFACE, WILL THERE BE SUFFICIENT IMPACT FORCE ON THE DETONATOR TO CAUSE THE EXPLOSIVE CHARGE TO DETONATE AND DRIVE THE DRIVE PLUNGER FOR THE EXTENT OF ITS LIMITED MOVEMENT AND THUS FORCE THE ELEMENT INTO THE MATERIAL, AND WHEN THE TOOL IS DROPPED, EVEN ON THE SAID ONE END OF THE CARTRIDGE PLUNGER, THE DETONATOR END OF THE CARTRIDGE IS NOT CRUSHED SUFFICIENTLY TO FIRE THE CARTRIDGE.