Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1980-06-06
1982-03-02
Tolin, Gerald P.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
361388, 339 75MP, H05K 720
Patent
active
043181570
ABSTRACT:
Apparatus is disclosed for removably mounting a printed circuit card to a chassis adapted to support an array of circuit cards. Two jackscrews are rotatably mounted to each circuit card by a bracket at each end of a row of electrical pin contacts. Mounted to the chassis at each end of a row of female electrical contacts is an anchor with a jackscrew-receiving opening. Insertion of the jackscrews into the anchors aligns the pin and the female contacts and turning of the jackscrews into the anchors then causes the pin and female contacts to electrically engage. Each jackscrew carries an internally threaded crown and a plurality of ramps between the crown and bracket. Each ramp is movable longitudinally of the jackscrew and also laterally by virtue of a bore therethrough larger in diameter than the jackscrew. The crown is movable toward and away from the bracket. Adjacent ramps have oblique and parallel mating surfaces such that crown movement toward the bracket moves adjacent ramps in opposite directions laterally of the jackscrew, urging alternate ramps and the circuit card against opposing channel walls in the chassis to frictionally secure the circuit card in the chassis.
REFERENCES:
patent: 1217539 (1917-02-01), Underwood
patent: 3631325 (1971-12-01), Wenz
patent: 3845359 (1974-10-01), Fedele
patent: 3848953 (1974-11-01), Petroshanoff
patent: 3853379 (1974-12-01), Goodman
patent: 3922051 (1975-11-01), Reynolds
patent: 4120021 (1978-10-01), Roush
patent: 4157583 (1979-06-01), Basmajian
Rank William J.
Whalen Michael J.
Control Data Corporation
Genovese Joseph A.
Niebuhr Frederick W.
Tolin Gerald P.
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