Low voltage welding circuit with non-conductive ground connector

Details Low voltage welding circuit with non-conductive ground connector Low voltage welding circuit with non-conductive ground connector

1977-04-25

1979-05-01

Grimley, Arthur T.

Electric heating

Metal heating

By arc

337 19, 361 91, B23K 910

Patent

active

041525760

ABSTRACT:
A protective ground connector for establishing a direct ground connection in response to a fault voltage in a welding circuit. A pair of smooth-faced metal blocks are clamped in face-to-face relationship with each other with a relatively thin shim of electric insulating material clamped between the opposed faces of the blocks. One of the blocks is electrically connected to a circuit to be monitored, the other block is electrically connected to ground. The electrical characteristics of the shim are such as to electrically insulate the two blocks from each other in the face of normal circuit voltages and to break down in response to a fault voltage in the monitored circuit to thereby establish a direct ground connection.

REFERENCES:
patent: 1402037 (1922-01-01), Armor
patent: 1457249 (1923-05-01), Janson et al.
patent: 2295379 (1942-09-01), Beck et al.
patent: 2338109 (1944-01-01), Green
patent: 2430206 (1947-11-01), Beck et al.
patent: 2914742 (1959-11-01), Heath
patent: 3926916 (1975-12-01), Mastrangelo
patent: 3975664 (1976-08-01), Baumbach
patent: 4041543 (1977-08-01), Pasculle et al.

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