Metal spraying apparatus

Metal spraying apparatus comprising:

• (a) a spraying device comprising a body, a feeding mechanism on the body for feeding metallic wires through two guide passages in the body, said guide passages converging forwardly in the direction of wire feed, and delivery means in the body through which a jet of air under pressure may be delivered towards the point of convergence of the guide passages;
• and
• (b) a supply device remote from the spraying device and which comprises an electricity supply comprising first and second terminal means, and means to apply an electric potential across said first and second terminal means, and a supply of air under pressure;
• wherein the spraying device comprises an inlet manifold comprising a central section and two outer sections on opposite sides of the central section, and the apparatus comprises a first conduit extending from the supply device to a first of the outer sections of the manifold within which conduit a first conductive means extends from the first terminal means to said first outer section and through which conduit air under pressure is fed from the supply thereof to said first outer section, said first outer section of the inlet manifold providing means to establish electrical connection between the first conductive means and one of the wires, and a second conduit extending from the supply device to a second of the outer sections of the manifold within which conduit a second conductive means extends from the second terminal means to said second outer section and through which conduit air under pressure is fed from the supply thereof to said second outer section, said second outer section of the inlet manifold providing means to establish electrical connection between the second conductive means and the other of said wires, the supply of air delivered by at least one of the conduits to the inlet manifold being delivered by passage means extending through the manifold from one of the outer sections to the central section thereof to said delivery means in the establishment of the jet of air under pressure.

Metal spraying apparatus comprising:

• (a) a spraying device comprising a body, guide passages in the body, an air motor on the body for feeding metallic wires through the guide passages, said guide passages converging forwardly of the device in the direction of wire feed through the guide passages, and delivery means in the body through which a jet of air under pressure may be directed from the body towards the point of convergence of the metallic wires;
• and
• (b) a supply device remote from the spraying device and which provides a supply of electricity and a supply of air under pressure;
• wherein two conduits extend from the supply device to the body, within each of which there extends a plurality of electrically conductive elements of solid cross-section, both said conduits being connected to the supply of air under pressure whereby air under pressure may flow from the supply thereof to the body in sufficient quantity for the establishment of the air jet and for the operation of the air motor, the air flowing over the surfaces of the electrically conductive elements and the electrically conductive elements in each of the conduits provide for the establishment of electrical conduction between one of the terminals of the electricity supply and one of the metallizing wires.