Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1990-04-02
1991-10-22
Tolin, Gerald P.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
165185, 357 81, 361388, H05K 720
Patent
active
050601121
ABSTRACT:
An electrical component assembly includes a printed circuit board with a plurality of power transistors mounted in parallel, spaced-apart rows, a longitudinally-extending heat sink, and a longitudinally-extending leaf spring that presses the transistors into contact with the heat sink, thereby providing heat conduction from the transistors to the heat sink. The assembly is provided by placing two parallel rows of transistors between two parallel, spaced-apart walls of the heat sink, sliding two longitudinally-extending leaf springs into the space between the rows of transistors, and then inserting a longitudinally-extending spring spacer between the two leaf springs. The spring spacer compresses the leaf springs against the power transistors, urging the transistors into heat-conducting contact with the walls of the heat sink. Each spacer can be provided with a tapered nose for easier assembly, and the springs can be provided with vertical cuts at intervals equal to the spacing of the transistors, for providing independent force components against individual transistors.
REFERENCES:
patent: 4288839 (1981-09-01), Prager
patent: 4605986 (1986-08-01), Bentz
patent: 4707726 (1987-11-01), Tinder
patent: 4923179 (1990-05-01), Mikolajczak
patent: 4972294 (1990-11-01), Moser, Jr.
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