US 5,683,059 A · Bobbin for superconducting coils

Bobbin for superconducting coils

AssigneesToyo Boseki Kabushiki Kaisha, The Tokyo Electric Power Company, Incorporated, Kabushiki Kaisha Toshiba

InventorsTsukushi Hara, Masahiko Nakade, Takeshi Ohkuma, Kenji Tasaki, Takashi Yazawa, Hideaki Maeda, Eriko Yoneda, Shunji Nomura, Toshihiro Kashima, Atsuhiko Yamanaka

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Abstract

A bobbin for superconducting coils, which is made of a fiber-reinforced plastic material containing: (1) a matrix resin; (2) a polyethylene fiber having a negative thermal expansion coefficient in the fiber lengthwise direction, the angle between the polyethylene fiber and the longitudinal axis of the bobbin being in the range of .+-.35.degree. to 90.degree.; and (3) a substance having an elastic modulus higher than that of the polyethylene fiber. The bobbin of the present invention is useful for superconducting coils because it only exhibits a quite low degree of deformation, even when used under external stress at cryogenic temperatures.

Claims22

Dependent claims

A bobbin for superconducting coils, which is made of a fiber-reinforced plastic material, the bobbin comprising:

(a) a matrix resin;
(b) a polyethylene fiber having:
a negative thermal expansion coefficient in a lengthwise direction of the fiber,
a strength,
an elastic modulus;
and
wherein an angle exists between the polyethylene fiber and a lengthwise axis of the bobbin, the angle being in the range of .+-.35.degree. to 90.degree.;
and
(c) a substance having an elastic modulus higher than the elastic modulus of the polyethylene fiber.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

08/631,160Filed 12 Apr 1996

Priority

JP 7-09876224 Apr 1995

Granted

4 Nov 1997

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

H01F 6/06
Superconducting magnets; Superconducting coils: coils, e.g. winding, insulating, terminating or casing arrangements therefor
B29C 70/08
Fibrous reinforcements only: comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or…
B29C 70/10
Fibrous reinforcements only: characterised by the structure of fibrous reinforcements , e.g. hollow fibres
B29C 53/56
Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor: winding and joining, e.g. winding spirally