Electricity: electrical systems and devices – Electric charging of objects or materials – Particulate matter
Patent
1976-11-05
1978-10-10
Saifer, Robert W.
Electricity: electrical systems and devices
Electric charging of objects or materials
Particulate matter
361235, 239 15, B05B 502
Patent
active
041200160
ABSTRACT:
A light-weight, portable power pack for supplying a high voltage output to an electrostatic spray gun from a low voltage input is disclosed. The power pack is cylindrical in shape with an axial opening adapted to receive the discharge channels of the spray gun so that it may be mounted on and may form a part of the spray gun and is detachable therefrom for replacement purposes. The power pack comprises a power supply circuit including a square wave oscillator connected through a square-loop, tape-wound core transformer to a voltage multiplier network for converting a low voltage DC to a high voltage DC for induction charging of material discharged from the spray gun, the circuit being encapsulated in an epoxy resin material to provide a suitable mounting case therefor. The case is molded into a suitable shape and is attached to the front of the gun by means of screws, bolts, a bayonet type connection or other suitable fastening means, the power pack being provided with external contacts which serve to engage corresponding contacts on the spray gun to provide an electrical connection through the gun to the power source, which may be a battery pack carried by the operator, and to engage coresponding contacts on the inductive charging device for the spray gun. The power pack can form the forward barrel portion of the spray gun with the discharge channels extending through the center of the case, or can be incorporated into detachable accessories such as a gas shroud forming chamber mountable on the forward barrel portion.
REFERENCES:
patent: 2302289 (1942-11-01), Bramston-Cook
patent: 2894691 (1959-07-01), Sedlacsik
patent: 3731145 (1973-05-01), Senay
patent: 4004733 (1977-01-01), Law
patent: 4033506 (1977-07-01), Braun
Keane J. Timothy
PPG Industries Inc.
Saifer Robert W.
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