Electrical switching device

Details Electrical switching device Electrical switching device

1997-09-22

1999-11-09

Donovan, Lincoln

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Air-current blowout

218123, H01H 3318, H01H 3370, H01H 3382

Patent

active

059818930

ABSTRACT:
This switching device has a contact arrangement which is equipped with erosion-resistant contacts and comprises at least one contact which moves along a central axis (2) and at least one mating contact which is provided for receiving the moving contact. One of the two contacts has a finger cage (25) which is provided with individual, sprung contact fingers (13) which are spaced apart from one another by radial slots (26) extended in the direction of the central axis (2). Means are provided which prevent the side edges (29) of the contact fingers (13) being able to touch in the region of the contact surfaces (27) in the front part of the contact fingers (13) when said contact fingers (13) are drawn together in the direction of the central axis (2) , such that welding of the edges (29) of the contact fingers (13) cannot occur.

REFERENCES:
patent: 3399286 (1968-08-01), Kerr, Jr.
patent: 4152560 (1979-05-01), McCloud et al.
patent: 4644118 (1987-02-01), Gengenbach et al.

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