Abstract: A dual laser beam angular separation control apparatus has a pair of rotatable mirrored flats that minimize the angular separation of two converging beams such that the beam crossing aperture is also minimized and remains fixed at a specific point. The apparatus further minimizes the optical path length that is required to cause two parallel laser input beams to be converged to a minimum aperature size at crossing without the use of lens, etc.

Abstract: An adjustable liquid thermal compensator mechanism which provides both an actuation end attached to an expandible volume portion of a liquid chamber and a manually controlled adjustable volume portion that is used to calibrate the stroke of the compensator by allowing the addition or release of fluid from the chamber. A supply reservoir is interconnected to the compensation chamber through a valve which provides the increased or decreased amount of fluid during chamber adjustment.

Abstract: A single acting dual piston positive displacement pump with alternating piston motion. A pump suitable for manual operation and operable at relatively high pressure such as 400 to 800 psig. A pump suitable for pumping corrosive liquids with the drive mechanism separated from the liquid lines. A pump housing with cylinder section and abutting manifold section, with the alternating reciprocating pistons in the cylinder section and the inlet and outlet openings in the manifold section, with the pistons projecting from the cylinder section opposite the inlet and outlet openings for connection to the piston drive mechanism.