Abstract: A straight dental handpiece comprising a pair of telescoping housing barrels which can normally swivel relative to each other, one containing a chuck and the other containing a vane type air motor. A change speed transmission is entrained between the motor and the chuck, such transmission being adjustable to change speeds by relative endwise movement of the barrels. Opening and closing of the chuck is accomplished by relative rotation of the barrels while holding down a stop button. A reversing valve, also on the handpiece, is movable into either of two positions relative to one of the barrels to supply air under pressure to either of two passages to drive the motor in one direction or the other.

Abstract: An improved combination hand tool is designed for interchangeable use in different applications, such as for instance, as a hatchet, hammer, knife, saw or dressing tool and is characterized by including a non-slip grip handle having a dressing tool at one end to aid in the skinning of game or animals and a socket portion at the opposite end to permit detachable connection of a plurality of interchangeable implements or tool attachments, the handle being provided with shoulders at opposite ends both to shield the hand from injury and to effect more positive, firm engagement between the handle and each tool secured thereto.

Abstract: A straight dental handpiece comprising a pair of telescoping housing barrels which can swivel relative each other, one containing a chuck and the other containing a vane type air motor. A change speed transmission is entrained between the motor and the chuck, such transmission being adjustable to change speeds by relative endwise movement of the barrels. Opening and closing of the chuck is accomplished by relative rotation thereof a limited amount. A reversing valve, also on the handpiece, is movable into either of two positions to apply air under pressure to either of two passages to drive the motor in one direction or the other.