Back to results
US 4,761,707 AGranted
Lightning-conducting insulators
AssigneesTokyo Electric Co., Ltd., NGK Insulators, Ltd.
InventorsKeiji Wakamatsu, Tetsuya Nakayama, Jun Atsumi
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneesTokyo Electric Co., Ltd., NGK Insulators, Ltd.
InventorsKeiji Wakamatsu, Tetsuya Nakayama, Jun Atsumi
Estimating the term…
A lightning-conducting insulator is disclosed, which comprises an insulator body consisting of a shed portion, a plurality of rib portions provided inside the shed portion, and a cup-like cylindrical head portion at a central upper portion of the shed portion, and a metal cap put and fixed onto the head portion, and a metal pin inserted and fixed inside the head portion. A cylindrical fitting section with a through hole is provided in the shed portion. At least one current-limiting element having a non-linear voltage-current characteristic is inserted into the through hole of the cylindrical fitting section. The cylindrical fitting section is sealed with a glass- and ceramics-bonding metal solder such that the upper and lower end faces of the current-limiting element and the end faces of the cylindrical fitting section may be continuously sealed.
A lightning-conducting insulator comprising an insulator body which comprises a shed portion, a plurality of annular rib portions provided inside the shed portion, and a cup-like cylindrical head portion at a central upper portion of the shed portion, a metal cap put and fixed onto the head portion, and a metal pin inserted and fixed inside the head portion, wherein a cylindrical fitting section with a through hole is provided in said shed portion, a current-limiting element having a non-linear voltage-current characteristic is inserted into the through hole, the cylindrical fitting section is sealed with a glass- and ceramics-bonding conductive metal solder such that upper and lower end faces of the current-limiting element and end faces of the cylindrical fitting section may be continuously sealed.
Dependencies are inferred from the claim text.