Electricity: conductors and insulators – Insulators – Through wall or plate
Patent
1989-11-29
1991-01-01
Askin, Laramie E.
Electricity: conductors and insulators
Insulators
Through wall or plate
439551, 439559, H01R 1374
Patent
active
049820559
ABSTRACT:
The feedthrough device includes first and second half housing members, each of which has an internal chamber. The feedthrough device further includes a removable header member that fits within the chambers of the first and second half housing members when they are threaded together. The first half housing member has a threaded protrusion which fits into a threaded aperture located in the wall of a sealed structure, such as the wall of a vacuum furnace. The threaded protrusion arrangement includes a first "O" ring which seals the periphery of the aperture in the wall of the sealed structure. The header has first connectable terminals on one end and second connectable terminals on the other end. In between the first and second connectable terminals of the header there is located a plate member which fits along the edge of the first half housing member chamber; and located between that edge and the plate is a second "O" ring. Wires connecting the first and second terminals pass through the plate member in a sealed arrangement. The second half housing member has an abutting structure located at the end of its chamber so that when the second half housing member threads with the first housing member, the plate is pushed by the abutting structure to squeeze the second "O" ring to complete a seal of the first half housing member chamber. Accordingly, the first connectors are sealed against the outside world, but are connected to the circuitry within and outside of the sealed structure.
REFERENCES:
patent: 2470066 (1949-05-01), Calabrese
patent: 3376169 (1968-04-01), Davis et al.
patent: 3613048 (1971-10-01), Brundza
Knight, R. D., "Vacuum Feed-Through Bushing", IBM Technical Disclosure Bulletin, vol. 2, No. 4, Dec. 1959, p. 9, , copy in 174-152 R.
Lawson John
Pollack Michael J.
Askin Laramie E.
Cleaver William E.
Three E. Laboratories Inc.
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