Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1986-04-04
1987-06-09
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
H01H 3366
Patent
active
046721568
ABSTRACT:
A relatively small vacuum bottle is taught in which the fixed electrically conductive end of the fixed contact member has cup-like cylindrical walls for forming part of an arc chamber. A ceramic main body for the vacuum interrupter is axially aligned with the cup-like walls and extends therefrom to form an elongated portion of the interrupter. An external metallic bellows is attached to the other axial end of the ceramic member and extends the interrupter further. The other end of the bellows member is attached to a movable contact end piece. All of the attachments are vacuum tight. As the movable end member is moved into a disposition of electrical contact with the fixed end member the external bellows compresses at its pleats. On the other hand when the movable contact member is moved away from the stationary contact member the movable bellows expands at its pleats. The bellows is protected internally from arc heat, light and by-products by an annular constriction in the ceramic member. Alternately, the bellows and ceramic members are axially interchanged with one another so that the ceramic member moves with the movable contact member. In this case, the bellows is protected from the arc heat, light and by-products by an internal ceramic member which moves with the movable contact to seal off the region of the arc interruption from the internal portion of the bellows.
REFERENCES:
patent: 3594525 (1971-07-01), Miller et al.
patent: 4365127 (1982-12-01), Sakuma et al.
patent: 4440995 (1984-04-01), Lange et al.
patent: 4446346 (1984-05-01), Kashimoto et al.
patent: 4614850 (1986-09-01), Kuhl et al.
Macon Robert S.
Moran M. J.
Westinghouse Electric Corp.
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