Browse Prior Art Database

Vacuum Feed-Through Bushing

IP.com Disclosure Number: IPCOM000098743D
Original Publication Date: 1959-Dec-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Knight, RD: AUTHOR

Abstract

This bushing permits a metal shaft or electrical conductor 1 to extend through and remain insulated from a wall of a pressure or vacuum chamber 2.

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Vacuum Feed-Through Bushing

This bushing permits a metal shaft or electrical conductor 1 to extend through and remain insulated from a wall of a pressure or vacuum chamber 2.

The bushing 3 is of a dielectric plastic such as Teflon having an elongated shank with an integrally formed conical section or enlarged portion 4. When assembled, mating fittings 5 and 6 tighten and bind upon the enlarged section 4 creating a pressure seal. The ends of the bushing are formed in elongated conical cups 7 and 8 to extend the flashover path and increase the insulating qualities of the bushing.

Because of its inherent lubricating quality, the Teflon material does not freeze to the electrical conductor or shaft, and, therefore, the latter readily transmits a rotary or linear motion through the wall of the pressure or vacuum chamber.

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