Geometrical instruments
Patent
1975-09-30
1976-07-06
Lake, Roy
Geometrical instruments
339 17M, 317100, H01R 1300
Patent
active
039678741
ABSTRACT:
Apparatus for uniformly cooling an array of printed circuit boards mounted in a card holding means includes a high velocity centrifugal fan which is in communication with a plenum chamber secured to the lower end of the card holding means. Disposed in the plenum chamber is a perforated screen configured to include a series of crests and troughs which operate as baffle means for providing resistance to the flow of high velocity air from the blower. The screen causes turbulence which reduces the velocity and uniformly directs the airflow through openings in the plenum chamber to the spaces between the array of printed circuit boards. The airflow thus divided cools each card on both sides as the air flows from bottom to top, thereby displacing the warmer air heated by the components mounted on the printed circuit boards.
REFERENCES:
patent: 3277346 (1966-10-01), McAdam et al.
patent: 3904262 (1975-09-01), Cutchaw
patent: 3915307 (1975-10-01), Agarde
Casella Anthony J.
Jones DeWalden W.
Lake Roy
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