Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1987-01-09
1988-02-23
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200144R, 89 8, H01H 3306, H01H 932
Patent
active
047272309
ABSTRACT:
A safety switch for use in an inductively driven electromagnetic launcher system includes three tubular conductors each having a substantially cylindrical internal surface, wherein these internal surfaces have substantially the same internal diameter and are positioned at spaced locations along a common axis. A fourth tubular conductor having a cylindrical external surface with a diameter which is substantially equal to the internal diameters of the first three conductors. This fourth conductor is mounted for movement along the common axis such that its external surface is capable of making sliding electrical contact with the internal surfaces of the first three conductors. The external surface of the fourth conductors has sufficient axial length to be capable of making electrical contact with each of the internal surfaces simultaneously. Means are provided for electrically connecting the first three tubular conductors to an external circuit and a switch actuating means serves to move the fourth tubular conductor axially along the common axis.
REFERENCES:
patent: 4369692 (1983-01-01), Kemeny
patent: 4426562 (1984-01-01), Kemeny
patent: 4433607 (1984-02-01), Kemeny
patent: 4534263 (1985-08-01), Heyne et al.
patent: 4572933 (1986-02-01), Swanson
P. Wildi et al., "High Current Switches in the Doublet III Poloidal Field Circuit", Proceedings of the Seventh Symposium on Engineering Problems of Fusion Research, IEEE Pub. No. 77C17 1267-4-NP, pp. 1753-1756, 1977.
Macon Robert S.
Schron D.
Westinghouse Electric Corp.
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