Spark gap for achieving arc elongation and compression without t

Details Spark gap for achieving arc elongation and compression without t Spark gap for achieving arc elongation and compression without t

1976-01-13

1977-10-04

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Miscellaneous discharge devices

3132311, 315 35, 315 36, 361137, H01J 1700, H01J 2100

Patent

active

040526399

ABSTRACT:
A current limiting spark gap for use in a valve type lightning or surge arrester includes a plurality of identical, mirror-image insulating gap plates assembled together to define arc elongation and cooling chambers between each pair of adjacent gap plates. Conductive electrodes are disposed on opposite sides of each gap plate. Dielectric rods extend through holes formed in the gap plates to vertically and horizontally align the gap plates in a vertical stack and to define and maintain the gap spacing between a pair of electrodes in each arc chamber. The spark gap utilizes only the electrode and arc chamber configurations to cause a follow current arc to move in each arc chamber to increase the length of the arc and to compress the arc against cooling walls and surfaces of the arc chambers. The electrode and arc chamber configurations achieve greater arc elongation and compression, and resultant cooling, to enhance follow current limitation. The follow current arc is elongated and compressed from a point of arc initiation through a projected angle exceeding 200.degree..

REFERENCES:
patent: 2917662 (1959-12-01), Cunningham
patent: 3152279 (1964-10-01), Misare
patent: 3263117 (1966-07-01), Nilsson
patent: 3484863 (1969-12-01), Kershaw, Jr.
patent: 3504221 (1970-03-01), Osterhout
patent: 3518483 (1970-06-01), Eason et al.
patent: 3576459 (1971-04-01), Sakshaug et al.

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