Importance

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Abstract

An insulating member formed from a suitable hydrocarbon such as polyether ether ketone may be molded into any desired shape at a temperature of approximately 700.degree. F. and a suitable pressure of approximately 10,000-12,000 psi. An epoxy insulating material hermetically seals the insulating member to an electrically conductive member and a metallic housing. The insulating member and the epoxy insulating material maintain the hermetic seal through a suitable range of temperatures such as between ambient and approximately 400.degree. F. and through a suitable range of pressures such as between atmospheric and approximately 60,000 psi. The epoxy insulating material is first applied to the surfaces of the conductive member and the metallic housing, one of these surfaces being preferably flat, and the insulating member is then inserted into the space between the conductive member and the metallic housing. The insulating member is then pushed toward the flat surface to cause the epoxy insulating material to flow between the insulating member and the housing and between the insulating member and the conductive member. The epoxy insulating material is then cured. A rigid insulating layer formed from metallic oxides may be applied to a second flat surface on one of the electrically conductive member and the metallic housing. Additional layers formed from the metallic oxides in different proportions to provide progressive flexibilities may be hermetically sealed to the rigid layer and to one another.

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First Claim