Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1977-05-27
1978-12-12
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200262, 200266, H01H 3366
Patent
active
041297610
ABSTRACT:
A vacuum circuit breaker comprising an evacuated envelope and a pair of movable conductive rods within the envelope having points of contact equipped with contact members, wherein the conductive rods slide into and out of engaging contact, the improvement comprising at least one of said contacts having circuit making and breaking contact members formed of an alloy consisting essentially of 9.4 wt% to 15 wt% Al, 4.5 wt% to 20 wt% Ni, 0.1 wt% to 10 wt% of at least one metal (Me) selected from the group consisting of bismuth, tellurium, selenium, antimony and magnesium with copper as the balance of the alloy, wherein said alloy contains an .alpha. copper phase (Cu(.alpha.)) containing nickel and a .gamma. copper phase (Cu(.gamma.)) containing nickel substantially dispersed throughout said alloy.
REFERENCES:
patent: 2975256 (1961-03-01), Lee et al.
patent: 3497652 (1970-02-01), Horn et al.
patent: 3551622 (1970-12-01), Takeuchi et al.
patent: 3770497 (1973-11-01), Hassler et al.
Chiba Seishi
Okutomi Tsutomu
Tejima Kouichi
Tsutsumi Tadahito
Yoshino Hisashi
Macon Robert S.
Tokyo Shibaura Electric Co. Ltd.
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