Kabushiki Kaisha Toshiba

Kiyoshi Osabe

Hiroshi Watanabe

Atsushi Yamamoto

Hideo Suzuki

Tsutomu Okutomi

Tsuneyo Seki

Masako Nakahashi

Shinzo Sugai

Miho Maruyama

Takashi Kusano

Kazuya Tujimoto

Hiroshi Yamazoe

Shoji Niwa

Rika Takigawa

The brazing filler of the present invention is excellent in wetting properties towards the open end of a ceramic cylinder and a metal sealing cap can be sealed well on the open end. The present brazing filler comprises Ag, Cu and active metal, in which the Cu-active metal compound is contained in an amount of not more than 40% by volume.

Brazing fillers for sealing vacuum-tight vessels, vacuum-tight vessels

A vacuum interrupter comprises a vacuum container which includes an insulation tube made of ceramics and having openings at both ends thereof, and sealing metals for hermetically sealing the openings respectively. In the vacuum container, a pair of contacts are disposed so that these contacts can detachably contact to each other. The composition of the material constituting at least one of the sealing metals comprises 25 to 55 wt % of Ni, 0.02 to 1.0 wt % of Si and substantially the residual amount of Cu. Preferably, the composition further comprises 0.02 to 1.5 wt % in total of Si and Mn and/or 5.0 wt % or less in total of Fe and Co.

Vacuum interrupter

Growing community of inventors

Tokyo, Japan

Kiyoshi Osabe