Bushing for electrical lead

Claim 1

A SEALING BUSHING FOR A PUNCHED HOLE USED AS A CONDUIT PASSAGE, COMPRISING A RESILIENT SLEEVE HAVING A BODY, SAID BODY HAVING A WALL PORTION WHICH IS TAPERED ALONG ITS LONGITUDIAL AXIS TOWARD A MAXIMUM DIAMETER POINT AND THEN REVERSELY TAPERED DOWN TO AN ELONGATED TUBULAR PORTION OF CONSTANT DIAMETER, SAID BODY AND TUBULAR PORTION HAVING A CENTRALLY LOCATED APERTURE FOR THE RECEPTION OF A CONDUIT, SAID APERTURE BEING OF SLIGHTLY SMALLER DIAMETER THAN THE CONDUIT TO EFFECT POSITIVE ENGAGEMENT THEREWITH UPON INSERTION OF SAID CONDUIT INTO THE APERTURE, SAID REVERSELY TAPERING PORTION OF THE BODY BEARING ON THE ENTRANCE SIDE OF SAID PUNCHED HOLE AND THE ELONGATED TUBULAR PORTION PASSING THROUGH SAID PUNCHED HOLE AND BEING DISPOSED TO FOLD BACK OVER THE EXCESS METAL ON THE EXIT SIDE OF THE PUNCHED HOLE THEREBY CAUSING A POSITIVE SEAL THEREWITH, AND DUE TO INHERENT RESILIENCY DRAWING THE REVERSELY TAPERED PORTION OF SAID BODY MORE FIRMLY AGAINST THE ENTRANCE SIDE OF SAID PUNCHED HOLE, SAID CONDUIT PASSAGE BEING THEREBY RENDERED IMPERVIOUS TO THE CASUAL PASSAGE OF FLUIDS OR FOREIGN MATTER.