Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1988-10-27
1990-12-25
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200147R, H01H 3318
Patent
active
049805282
ABSTRACT:
In an arc interrupter fixed and movable contacts provide an openable current path. When the path between the contacts is opened an arc is generated between one of the contacts or a surface electrically continuous therewith providing an inner first arcing surface, and an electrode providing an outer second arcuate surface. The opening and closing of the current path is achieved by angular movement of the movable contact about an axis offset from the fixed contact. At least in the break position, the electrode surrounds and is separated by an annular gap from a coaxial arc-driving coil. The coil is accommodated within and is coaxial to the inner first surface and is included in series with both said surfaces in the arc current path at least during a later part of the movement of the movable contact to the break position for generating a magnetic field that rotates the arc to assist its extinguishment.
REFERENCES:
patent: 2150564 (1939-03-01), Rowe
patent: 2820122 (1958-01-01), Teszner
Macon Robert S.
Northern Engineering Industries plc
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