Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1985-08-15
1987-02-17
Tolin, G. P.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
361415, 411 33, 211 41, H05K 720
Patent
active
046444440
ABSTRACT:
Heat dissipation from electronic modules is improved by clamping their edges against heat-conducting fins in a housing by means of two expanding jackscrews. Each jackscrew has a shaft mounted in bearings in the module and carries a row of alternate closed rings and split rings. The closed rings are smaller in diameter than the split rings and have a circular section. The split rings are of tubular shape, having ends of circular section which engage the closed rings. The forward end of the shaft is screw-threaded to engage a fixed nut in the housing. When the shaft is screwed into the fixed nut, it pulls a connector on the module into engagement with a cooperating connector in the housing. At the same time, the closed rings are forced against the split rings, causing them to expand radially and exert a clamping force against the edges of the modules, forcing them into thermal contact with the fins in the housing.
REFERENCES:
patent: 2734749 (1956-02-01), Benjamin
patent: 4318157 (1982-03-01), Rank
patent: 4366651 (1983-01-01), Thomas
patent: 4480287 (1984-10-01), Jensen
patent: 4488842 (1984-12-01), Deutsch
Smiths Industries Public Limited Company
Tolin G. P.
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