Pneumatic fastening tool

Apparatus for holding and attaching parts to a workpiece comprising a driver and a parts holder attached to said driver;

• said driver comprising a nozzle having an end surface and an internal hammer travelway terminating in an opening in said end surface, means including a side opening in said nozzle for positioning a fastener in said travelway, operating means for causing said hammer to move through a drive stroke and a return stroke along said travelway so that said hammer can drive a fastener out of said travelway via said opening, and safety means for preventing said operating means from causing said hammer to move through said drive stroke until said safety means is operated, said safety means comprising an actuating member in said nozzle and protruding from said end surface arranged to release said safety means when said actuating member is depressed;
• said parts holder comprising a part support member located adjacent to and movably spaced apart from said end surface and adapted to support in the path of movement of said hammer and in adjacent and confronting relation with a workpiece a part intended to be fastened to said workpiece, and means carried by said nozzle for movably supporting said part support member for movement toward and away from said end surface of said nozzle so that when said part support member is positioned so that said part or said part support member is contacted with said workpiece said part support member may be moved toward said end surface a selected amount sufficient to cause said workpiece, said part support member or a part supported by said part support member to contact and depress said actuating member, whereby said driver may be operated to drive a fastener out of said hammer travelway into a workpiece with said fastener penetrating the part held by said part support member as it is discharged from said travelway.