Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1991-10-31
1993-07-06
Thompson, Gregory D.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
165185, 165907, 361415, H05K 720
Patent
active
052259641
ABSTRACT:
A plurality of heat sinks assembled to form a rack in a lightweight housing accommodate printed circuit cards between the heat sinks and circulate cooling oil through the heat sinks to drain the test heat from the boards quickly. Each heat sink uses a porous metal foamed core, configured in zigzag shape, to provide a tortuous path for the fluid flow which extends into lateral fins comprising the side plates of the porous metal foam for receiving the cards or ground plates therefore. These plates are clamped against the fins for close contact to the cooling fluid thereby shortening the heat flow path. Brazed on aluminum top and bottom cover plates make a fluid tight connection with the porous foamed metal. The brazed on top and bottom plates are also configured in the zigzag pattern of the porous foamed metal. Lightweight thin aluminum feelers or plates conform to the zigzag sides of the porous foamed metal and are clamped thereagainst by side covers so that the feelers melt in a brazing process for sealing the side covers in fluid tight core conforming relationship with the porous foamed metal core.
REFERENCES:
patent: 2448315 (1948-08-01), Kunzog
patent: 2893703 (1959-07-01), Richardson
patent: 4315300 (1982-02-01), Parmerlee et al.
patent: 4962444 (1990-10-01), Niggemann
patent: 5057968 (1991-10-01), Morrison
Caldwell Wilfred G.
Hamann H. Fredrick
Montanye George A.
Rockwell International Corporation
Thompson Gregory D.
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