Patent ID: 7820934
Filing Date: 2010-10-26
Classification: H01H

Abstract:
1. A vacuum cartridge, comprising an enclosure of substantially cylindrical shape closed by first and second end cover-plates and housing two arcing contacts and first and second dielectric shields respectively fitted around the first and second end cover-plates, the cartridge further comprising a first extender fitted between the first end cover-plate and the first dielectric shield, and a first side of the first extender welded to said first end cover-plate and a second side of the first extender welded to said first dielectric shield, wherein at least one of the contacts is movable, and fixed to a movable electrode by a third extender fitted between the movable contact and the movable electrode; wherein the first dielectric shield is fitted around the enclosure, and the cartridge further comprises a second extender fitted between said first dielectric shield and the enclosure, a first side of the second extender welded to said enclosure, and a second side of the second extender welded to said first dielectric shield; wherein each contact comprises a tubular recess, and the tubular recess is of a shape complementary to a shape of a corresponding electrode, and the third extender is of a disk shape with a closed tubular duct in a center thereof, which tubular duct is insertable into a tubular recess of a corresponding contact and for receiving a complementary part of an electrode, the third extender for securing a contact to an electrode.