Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1987-08-31
1990-01-16
Thompson, Gregory D.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
16510433, 181202, 181225, 361384, 361391, 361415, H05K 720, H02K 524
Patent
active
048947490
ABSTRACT:
Option-equippable apparatus such as a computer that is not fully equipped with option circuit boards (14) has filler boards (15,16) connected to free board slots (13). In one embodiment, the filler boards (15) simulate the effect of circuit boards on airflow and act to evenly distribute the cooling air flow inside the computer cabinet (10) in order to provide improved cooling of the circuit boards. In another embodiment, the filler boards (16) block airflow between filler boards connected to adjacent board slots to direct more cooling airflow to any slots equipped with option circuit boards. The filler boards are made of electrically-conductive material (30) to absorb electromagnetic radiation emissions, and are covered with acoustically-absorbent material (33) to absorb sound emissions of the apparatus.
REFERENCES:
patent: 4186422 (1980-01-01), Laermer
patent: 4399485 (1983-08-01), Wright et al.
Lockhart et al., "Multifunctional Composite Panel", IBM Technical Disclosure Bulletin, vol. 19, No. 10, 3/77, pp. 3785-3786.
Cha, "Air-Cooling Scheme Having Enhanced Acoustic Performance", IBM Technical Disclosure Bulletin, vol. 22, No. 3, 8/79, pp. 1108-1109.
DeSilva et al., "Low Noise Air Moving Chamber for an Electronic Apparatus Enclosure", IBM Technical Disclosure Bulletin, vol. 20, No. 4, 9/77, p. 1336.
J. S. Hanson, "Environmental Test Chamber for Circuit Card", IBM Technical Disclosure Bulletin, vol. 20, No. 5(10-77), pp. 1837-1838.
Elko Gary W.
Howard Paul
Quinlan Daniel A.
American Telephone and Telegraph Company AT&T Information Systems Inc
AT&T Bell Laboratories
AT&T Information Systems
Thompson Gregory D.
Volejnicek David
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