Title: Lightning arrester device

Abstract: A grounded cylindrical metallic housing is hermetically closed at one end and an electric insulation hermetically extends through the other closed end of the housing to form in the housing a space filled with an electrically insulating gas. An arrester element disposed in the space has the incoming-line side connected to a terminal extended and sealed through the insulation and the ground side electrically connected to the housing. The incoming-line side of the arrester element is surrounded by both the insulation and a shield ring embedded therein.

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Inventors: Nagai, Nobuo (Nishinomiya, JP)
Watanabe, Tugio (Akoh, JP)
Tada, Shoji (Itami, JP)

Application Number: 680368
Filing Date: 1976-04-26
Publication_date: 1979-01-23
Assignee: Mitsubishi Denki Kabushiki Kaisha (JP)
Primary Class(es): 313/325 313/231.11, 315/36, 361/120, 361/123
Other Classes:
US Patent Ref:

2987642	Jun, 1961	Yonkers	313/231.
3151274	Sep, 1964	Snel, Jr.	313/325.
3519878	Jul, 1970	McStrack et al.	313/325.
3588578	Jun, 1971	Clinkenbeard	313/325.
3624450	Nov, 1971	Graybill	361/120.
3649875	Mar, 1972	Nagai et al.	315/36.
3753045	Aug, 1973	Osmundsen et al.	315/36.
3842318	Oct, 1974	Nitta	315/36.

Other Refs:
Primary Examiner: Chatmon, Jr., Saxfield
Assistant Examiner:
Attorney: Burns; Robert E., Lobato; Emmanuel J., Adams; Bruce L.