Vacuum switch

Details Vacuum switch Vacuum switch

1978-09-11

1981-01-06

Scott, James R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200266, 200279, H01H 3366

Patent

active

042438594

ABSTRACT:
An improved vacuum switch has slotted, flexible, discus-shaped contact discs attached to the current carrying contact bolts. In the open circuit case, a gap exists between each contact bolt and its corresponding contact disc and between the two discs. In the closed circuit case, the contact bolts drive the contact discs against one another, slightly deforming the contact discs, resulting in a low resistance current path. As the switch starts to open, the contact bolts first separate from the adjacent disc surfaces. As the switch opens further, any arc that ignites exists only between the contact discs. Tangential slots in the contact discs guide the arc toward the center of the contact discs. The flexible discs assume their previous undistorted shape when the switch has opened.

REFERENCES:
patent: 3065321 (1962-11-01), Ainsworth
patent: 3818164 (1974-06-01), Mizutani et al.
patent: 3941961 (1976-03-01), Kopplin
patent: 3980850 (1976-09-01), Kimblin

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