Magnetic device

Details Magnetic device Magnetic device

2005-01-25

2005-01-25

Donavan, Lincoln (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Superconductive type

C335S300000

Reexamination Certificate

active

06847278

ABSTRACT:
A magnetic device which is highly durable, reliable, and safe without being damaged when a magnetic filed is applied. The magnetic device includes a cooling device having a cold head refrigerated by an effect of a cryogenic refrigerator, a magnetic field generation device configured to apply a non-stationary magnetic field on a magnetic body, and a cold head extension portion configured to thermally connect the magnetic body and the cold head. The cold head extension portion includes at least two members, one a low resistance member and the other a high resistance member having different resistivities. With this device, the eddy current generated in the cold head extension portion and the electromagnetic force produced in the cold head by the cold head extension portion are reduced.

REFERENCES:
patent: 6441710 (2002-08-01), Yanagi et al.
patent: 0350266 (1989-07-01), None
patent: 11-283822 (1999-10-01), None
patent: 2000-277333 (2000-10-01), None

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