Hermetic electrical penetrator
AssigneeInternational Telephone and Telegraph Corporation
InventorGeorge J. Panek
Life of this patent
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Abstract
A hermetic electrical penetrator comprising a shell mounted in a single penetrator plate. A pair of axially spaced sealing members are sealed inside the shell defining a leak sensing chamber therebetween. One or more electrical contacts extend longitudinally through the sealing members in the shell. A sensing port in the wall of the shell communicates with the sensing chamber so that any leakage of gas through the shell can be detected by measuring the pressure differential between the inside and the outside of the shell. Preferably the sealing members are glass beads, and a porous ceramic spacer extends between the beads substantially filling the leak sensing chamber so that pressure differentials may be more easily detected.
Claims3
A hermetic electrical penetrator comprising:
- a hollow shell having a bore therethrough;
- a pair of axially spaced sealing members in said bore sealed at their outer periphery to the wall of said bore, said spaced sealing members defining a leak sensing chamber therebetween;
- at least one electrical contact extending lengthwise through said sealing members, said contact being sealed in said sealing members;
- and a leak sensing port in said shell extending from said chamber to the exterior of said shell, said shell embodying relatively smaller and larger diameter outer cylindrical surfaces joined by a generally annular shoulder;
- and said port opening at said smaller diameter outer surface of said shell.
Dependencies are inferred from the claim text.