Sealing capacitor fill holes

Details Sealing capacitor fill holes Sealing capacitor fill holes

H - Electricity

01

G

334/16, 334/22,

H01G 4/04 (2006.01) H01G 1/02 (1980.01)

Patent

CA 1049630

ABSTRACT OF THE DISCLOSURE In a capacitor of the type having a liquid dielectric impregnated capacitor element mounted in a metal can, electrical terminals passing through openings into the can, and a fill hole through a wall of the can for addition therethrough of liquid impregnant, that improvement comprising a sleeve-like, integral extension of the wall surrounding the fill hole and coaxial there- with, the extension being of circular cross-section, and a solid, resilient plug inserted in the hole and extending coaxially there- with, the unstressed outside diameter of the plug being larger than the corresponding inside diameter of the extension whereby the plug when inserted in the hole is in compression, one end of the plug extending outwardly of the wall a distance sufficient so that downward manual pressure on the plug will cause it to bend slightly and thus resist being pushed down through the extension, the other end of the plug extending into the can beyond the extension to provide a reexpanded portion which resists upward withdrawal of the plug.

237483

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