Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1979-06-15
1981-07-07
Tolin, Gerald P.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
361415, H05K 720
Patent
active
042778158
ABSTRACT:
A rubber seal vulcanized to a removable strip is shown for forming a replaceable air seal for a plug-in printed circuit board or the like which is removeably mounted in a frame. The rubber seal defines upwardly outwardly extending sealing lips in a configuration having generally parallel sides and closed ends and dimensioned to sealingly engage the opposed facing surfaces of a pair of pre-assembled spaced circuit boards having the electrical components mounted thereon disposed in the space therebetween. The strip supporting the rubber seal is slidably received within machined grooves in opposed facing mounting plate members for the boards. Apertures in the opposed mounting plates and apertures in the strip are in alignment therewith when the strip is properly inserted within the plates. The rubber seal surrounds the aperture of the strip and seals against the opposed facing boards and attached supports to direct cooling air into the space between the boards through the aligned apertures. As the rubber sealing lips become damaged through repeated removal and reinsertion of the board pair assembly, the seal is readily replaced by removing and inserting a new strip having a seal bonded thereto.
REFERENCES:
patent: 3382476 (1968-05-01), Novet
patent: 3495132 (1970-02-01), Anhalt
patent: 4107760 (1978-08-01), Zimmer
Possessky E. F.
Tolin Gerald P.
Westinghouse Electric Corp.
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