Abstract: A narrow beam arc spray head device includes a convergent-divergent nozzle; a number of wires the paths of which intersect at a point in the nozzle; controller for supplying an electrical current to the wires so that an arc is formed between the wires causing a portion of at least one of the wires to melt; a primary axial gas stream impinging upon the wire path intersection to cause the molten metal to be carried axially away from the area of the intersection; and a secondary gas stream forming a generally conical sheath around the axial gas stream in the divergent portion of the nozzle; whereby the primary gas stream and the secondary gas stream emerge from the nozzle as substantially coaxial gas streams thus tending to concentrate the flow of the molten metal carried by the coaxial streams. The spray head device may also include a regulator for regulating the secondary gas stream relative to the primary axial gas stream.

Abstract: Membrane switch device comprises first and second parallel insulating supports having opposed first and second surfaces. A first surface central contact and a peripheral contact are provided on the first surface, the peripheral contact extending around and being isolated from the first surface central contact. The first surface central contact and the peripheral contact have commoning extensions which project towards each other and have adjacent free ends. The free ends of the extension define a commoning locus that surrounds the center of the switch site. The second surface has a second surface central contact thereon which is opposed the first surface central contact and a commoning contact which is opposed to and, conforms to, the commoning zone. The shorting contact is electrically isolated from the second surface central contact. Circuit conductors extend to both contacts on the first surface and to the second surface central contact only on the second surface.

Abstract: A thermally responsive fluid and electrical switch particularly for use in an automotive engine control system has first and second housing means each with an open-ended well, the housing means being secured together so that the wells cooperate to form a switch chamber. Fluid ports and terminal apertures open into the second housing means, and terminals are mounted in the terminal apertures to extend into the chamber. Valve and contact means are disposed in the chamber. A thermally responsive snap acting disc is mounted in the chamber in heat-transfer relation to the thermally conducting first housing to move in response to selected temperature changes and motion transfer means move in the chamber with the disc for moving the valve means to regulate fluid flow between the ports and for moving the contact means to regulate the flow of electrical current between the terminals.