Electricity: conductors and insulators – With fluids or vacuum – With cooling or fluid feeding – circulating or distributing
Patent
1986-10-16
1987-09-22
Askin, Laramie E.
Electricity: conductors and insulators
With fluids or vacuum
With cooling or fluid feeding, circulating or distributing
335216, H01F 724
Patent
active
046956751
ABSTRACT:
An improved electric lead device for a superconducting electric apparatus particularly suited for small current ratings is disclosed in which the total cross sectional area of conductors disposed in a cylindrical lead housing formed of a metal pipe can be reduced from their normal temperature side toward their cryogenic temperature side without any difficulty while materially improving the cooling efficiency on the conductors. The electric lead device comprises: a coolant tank for storing therein a cryogenic coolant; a superconducting electric apparatus disposed in the coolant tank; a lead housing secured to the coolant tank and communicating with the interior of the coolant tank for introducing therein coolant gas vaporized from the cryogenic coolant; and conductors received in the lead housing and extending from a normal temperature side to a cryogenic temperature side for electrically connecting the superconducting electric apparatus to the outside, the conductors being constructed such that the total cross sectional area of the conductors decreases from the normal temperature side toward the cryogenic temperature side. The conductors are formed of conductor wire elements each covered with an electrically insulating layer.
REFERENCES:
patent: 3317651 (1967-05-01), Deiness
patent: 4625193 (1986-11-01), Purcell
Askin Laramie E.
Mitsubishi Denki & Kabushiki Kaisha
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