Abstract: A method for removing excess solder from a printed circuit board is practiced by mixing a quantity of ceramic beads with an oil to form a fluidized bed mixture. The fluidized bed mixture is heated to a temperature above the melting point of a solder on the printed circuit board. A surface of the printed circuit board to be cleaned is placed in contact with the heated fluidized bed and agitated against the bed to remove excess solder.

Abstract: A hand gun has a cylinder, a chamber in the cylinder for holding a shell casing, an extractor rod extending through the cylinder adjacent the chamber, an extractor on an end of the extractor rod normally held in a closed position adjacent the chamber, and a return spring around the extractor rod for normally biasing the extractor into its closed position. The extractor normally can slide the casing entirely out of the chamber in response to travel of the extractor rod. A safety bushing is secured around a portion of the extractor rod, and the return spring is biased against the safety bushing. The safety bushing reduces the travel of the extractor rod which, in turn, limits the distance that the extractor can move the shell casing out of the chamber.

Abstract: A gun sight includes a gun sight body having a fixed front sight and a movable rear sight leaf having a rear sight for being aligned with the front sight when shooting. The gun sight body has a rotatable cam with a series of spaced apart camming surfaces, and the sight leaf has a series of independently adjustable cam followers for being engaged by corresponding camming surfaces. Rotation of the cam sequentially moves each camming surface into contact with a corresponding cam follower to move the level of the rear sight between a plurality of fixed positions with respect to the front sight. The cam followers are independently adjustable to provide settings for selected target distances, and the cam can be releasably locked in a plurality of set positions which are indexed to indicate the target distances associated with the settings of the corresponding cam followers. Preferably, the rear sight can be moved to each preset position during a single rotation of the cam.