Kabushiki Kaisha Toshiba

Toshiba Material Engineering Corporation

Yasuhiko Nakano

Takashi Tanaka

Ryozo Akiyama

Kayo Nakano

Isamu Koseki

Motoaki Esaki

Kan Suganomata

Masami Ito

Keisuke Hayashi

Motohisa Sakai

Mikiharu Fukuchi

One embodiment provides a tungsten wire containing 1 to 10% by mass of rhenium, the wire having a point indicating a 2% elongation within a quadrangle formed by joining points with straight lines, where the values of x and y are point (20, 75), point (20, 87), point (90, 75), and point (90, 58), in this order; wherein the wire diameter of the tungsten wire is represented by x &#x3bc;m, and the elongation of the tungsten wire is 2% after electrically heating with an electrical current which is a ratio of y % to the fusion current (FC) at the wire diameter x &#x3bc;m, and wherein a semi-logarithmic system of coordinates is expressed by a horizontal axis using a logarithmic scale of the wire diameter x and a vertical axis using a normal scale of ratio y to the fusion current.

Tungsten wire, cathode heater and vibration service lamp filament

A vibration-proof tungsten wire which forms, in cases where the diameter of the wire is D mm and when an electric current corresponding to 90% of the fusion current value is passed therethrough for 5 minutes, a wire having

Vibration-proof tungsten wire

Growing community of inventors

Yokohama, Japan

Yasuhiko Nakano