Power supply chassis assembly for electronic circuit with cooling

Claim 1

In a power supply assembly of the type wherein an alternating voltage is applied to a primary winding and is stepped down at a secondary winding which has its end terminals connected to a pair of diode rectifiers and a ripple suppressing choke coil is connected to a center top of said secondary winding and a plurality of filter capacitors cooperate with said choke coil to produce a smooth pulsating direct current which is applied to a plurality of transistors which control the magnitude of an output direct current, the improvement comprising, a support, an electrically and thermally conductive chassis subassembly mounted on said support and electrically insulated therefrom, said subassembly comprising; a electrically conductive base plate a plurality of upstanding flanges mounted conductively on said base plate with the collectors of each of said transistors and the cathodes of each of said rectifiers in electrical and mechanical contact with said flanges; and a bracket means electrically conductively connected to said base plate with each of said filter capacitors having one terminal in electrical contact with said bracket means whereby said cathode of each of said rectifiers, said collector of each of said transistors and said one terminal of each of said capacitors are maintained at one and the same electrical potential by electrical conduction; and an airblower disposed on said support and arranged to pass an airstream over said subassembly for conveying heat therefrom by convection.