Power operated contact apparatus for superconductive circuit

Refrigeration – Storage of solidified or liquified gas – Including cryostat

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335216, 361 19, 361141, F25B 1900

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active

048723223

ABSTRACT:
A power operated contact apparatus extends and retracts one or more electrical leads into and out of a cryostat for making and breaking, at a cryogenic temperature, electrical contacts with a superconductive circuit. A pair of rigid elongated leads extend into a cold space of the cryostat which is at or near a cryogenic temperature. A connector is fixed at the inner end of each lead for making electrical contact in the cold space with a mating connector of the superconductive circuit. A guide journals each lead for axial movement and seals against the leading using an elastomeric O-ring coated with a lubricious polymer. A foundation is attached and sealed to the cryostat and to the guide means so that the connector on the inner end of the lead is extendable into making electrical contact with the connector of the superconductive circuit in the cold space. An air cylinder operated four bar linkage extends and retracts the leads to and from making electrical contact wiht the superconductive circuit in the cold space. The leads are cooled by flowing cryogen from the cryostat through them, which flow is turned off when they are disconnected, and prevented from freezing up outside of the cryostat by a flow of air directed around the leads.

REFERENCES:
patent: 4510758 (1985-04-01), Tench, Jr.
patent: 4516404 (1985-05-01), Laskaris
patent: 4526015 (1985-07-01), Laskaris
patent: 4544979 (1985-10-01), Ennis, Jr. et al.
patent: 4614393 (1986-09-01), Laskaris
patent: 4635450 (1987-01-01), Laskaris
patent: 4635451 (1987-01-01), Laskaris
patent: 4694663 (1987-09-01), Miller
patent: 4702825 (1987-10-01), Selvaggi et al.
GE Medical Systems GE Magnet & Cryogens Subsystem Handbook, Rev. 3, Direction 15093, pp. 6-5, 6-6, 6-7 and 2-2.

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