Permanent current switch for short circuiting a superconducting magnet
AssigneeSiemens Aktiengesellschaft
InventorHans Hieronymus
Life of this patent
Estimating the term…
Abstract
A permanent current switch for short circuiting a superconducting magnet with at least two contacts, in which the contact surface of one of the contacts has the shape of a calotte and the contact force (F) is at least 500 N, permitting the use of contacts made exclusively of normally conducting material and resulting in a simple, operationally reliable mechanism.
Claims10
In a permanent current switch for short circuiting a superconducting magnet, cooled by a cryogenic medium, said switch including at least two contacts, at least one of which is curved and which contact consists of high purity, electrically highly conductive material and are cooled by the cryogenic medium, and mechanical actuating means for bringing said contacts together with a contact force of at least 500 N, the improvement comprising:
- (a) the contacts being disposed directly in said cryogenic medium within a cryostat containing said cryogenic medium for cooling said superconducting magnet;
- (b) both of the contacts consisting exclusively of fine silver;
- (c) the curved contact surface being shaped as a calotte;
- and
- (d) the hardness of the materials of the contact surfaces being different.
In a permanent current switch for short circuiting a superconducting magnet, cooled by a cryogenic medium, said switch including at least two contacts, at least one of which is curved and which contact consists of high purity, electrically highly conductive material and are cooled by the cryogenic medium, and mechanical actuating means for bringing said contacts together with a force of at least 500 N, the improvement comprising:
- (a) the contacts being disposed directly in said cryogenic medium within a cryostat containing said cryogenic medium for cooling said superconducting magnet;
- (b) at least one of the contacts consisting exclusively of fine silver;
- (c) the curved contact surface being shaped as a calotte;
- (d) the hardness of the materials of the contact surfaces being different;
- and
- (e) said mechanical actuating means including a rotating device for bringing about a slight rotation of the one contact surface on the other contact surface about an axis of rotation in the direction of the contact force.
In a permanent current switch for short circuiting a superconducting magnet, cooled by a cryogenic medium, said switch including at least two contacts, at least one of which is curved and which contacts consist of high purity, electrically highly conductive material and are cooled by the cryogenic medium, and mechanical actuating means for bringing said contacts together with a contact force of at least 500 N, the improvement comprising:
- (a) the contacts being disposed directly in said cryogenic medium within a cryostat containing said cryogenic medium for cooling said superconducting magnet;
- (b) said switch comprising two stationary plane contacts made of fine silver, inclined relative to each other and a further movable single contact piece with two calotte-shaped contact surfaces made of fine silver, disposed between said two plane contacts and connected to the mechanical actuating means;
- and
- (c) the hardness of the material of the contact surfaces of the plane contacts and the further single contact piece being different.
Dependencies are inferred from the claim text.