Abstract: A three-piece fastener includes a bolt with a shank having a concentric opening in its threaded end, a nut adapted to fit over the threaded end of the bolt, and a wedge member which is insertable into the end opening of the bolt for expanding and thereby securing it. The threaded end of the bolt is axially slotted to facilitate its expansion.The outer diameter of the wedge member is smaller than the outer diameter of the threaded end of the bolt. When the bolt is to be inserted into an opening of a structure in order to accomplish a fastening action, the wedge member is first loosely inserted into the end opening of the bolt. Then when the bolt and wedge are passed through the opening, the nut is applied to the end of the bolt and is tightened. Thereafter, the wedge is tightened in order to expand the end of the bolt.The end opening of the bolt has interior threads, and is threadedly engaged by the wedge member, but in an opposite rotational sense to that in which the nut is applied to the bolt.

Abstract: A driver with automatic speed and torque switching including two different drive trains which operate in parallel and are driven at the same time by a motor. One drive train provides a high-speed output while the other provides a low-speed output. A single drive head for transmitting torque to the nut is normally coupled to the high-speed output, and not to the low-speed output. The machine operates initially at the high speed for the "free rotation" of the nut. When the nut contacts the surface of the structural body, the drive coupling to the high-speed output is disabled, and the low-speed output (which formerly was not coupled to the drive head) is not at the same time coupled to the drive head. The nut is then driven much more slowly but with a higher driving torque. Within the low-speed drive train there is included a friction clutch, and adjustment means for adjusting the level of torque at which it will slip.

Abstract: A locking device for preventing the theft of certain vehicles equipped with automatic transmissions. The device is designed to mount on the shift lever of certain types of automatic transmissions and prevent shifting out of the PARK position, thus preventing theft of the automobile, even though the engine may be started by unauthorized means. The device is readily attachable to automatic transmission shift levers of the type for which it is designed, cannot be removed without a key, is positive in operation so as to prevent shifting of the transmission when locked, is simple and economical to manufacture, and is reliable and effective in preventing unauthorized operation of a vehicle.