Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1991-02-14
1992-12-01
Picard, Leo P.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
361391, 361394, 165122, H05K 720, H05K 502
Patent
active
051684241
ABSTRACT:
Electrical apparatus is described which may include one or more electrical devices, each being located in a corresponding one of a plurality of device positions defined in a first section of a housing. The system further includes at least one dual side entry brushless dc motor driven centrifugal fan positioned such that each side entry is opposite a device position, and a power supply unit. In operation, the fans provide forced air cooling of the devices and power supply. Each of the devices is selected from a plurality of possible device types, each device type presenting a different impedance to the flow of cooling air.
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"Gate/Shutter Airflow Control Device", IBM Technical Disclosure Bulletin, vol. 32, No. 3A, Aug. 1989.
Inter-Noise Conference Proceedings Dec. 1989, Newport Beach, U.S. pp. 151-156 David S. Gaunt: "The Design and Development of a Low Noise DC Motor Driven Centrifugal Fan".
Electronic Packaging and Production, vol. 30, No. 2, 1 Feb. 1990, Newton, Mass. U.S. pp. 181-185; Timothy S. Burke: "Forced Air Keeps Electronics Cool".
Bolton Ivor W.
Castle Frank E.
Gaunt David S.
International Business Machines - Corporation
Jackson John L.
Phillips Michael W.
Picard Leo P.
Truelson Roy W.
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