Nippon Kokan Kabushiki Kaisha

Fuji Toyuki Kabushiki Kaisha

Asai Yushi Kogyo Kabushiki Kaisha

Yukio Hosaka

Tomio Yamamoto

Koji Sakasegawa

Takeo Yamada

Kunio Matsui

Kazuo Kunioka

Atsushi Ohsumi

Atsushi Osumi

Tatsue Saito

Tadashi Asai

A transportation arrangement with spotlight projectors for illuminating the trunnions of a molten iron ladle for viewing by an operator when engaging a hoisting hook with the trunnion of the ladle. A spotlight projector employs a very high pressure mercury lamp as a light source and the beam of light from this light source is projected in the form of a bundle of parallel light rays of specific wavelengths through a collimator lens system. This system employs an elliptic reflecting mirror, a slit, a filter for transmitting specific wavelengths and a convex lens. The projected bundle of parallel light rays consists of a group of green and yellow bright-line spectra having a center wavelength of 5,000 A. The projector is designed to be mounted on an overhead travelling crane and its projection optical axis is adjustable.

Transportation arrangement with spotlight projectors for illuminating

There are provided a method and apparatus for noncontact measurement of a gauge of a high temperature material such as a red-hot steel slab, wherein the entire optical system including a light source, a filter and a detector is employed at wavelengths in the near-ultraviolet zone, preferably in the range 4,300 - 4,400 A, and a sampling mark corresponding to a reference projection point for an optical mark of wavelengths in the near-ultraviolet zone is established on the screen of a television receiver on which the optical mark is displayed in accordance with the output of a camera tube which receives the optical mark through a band-pass filter which transmits the wavelengths in the near-ultraviolet zone, whereby the light source and the camera tube are translated from the reference positions until the optical mark formed on a high temperature material to be measured coincides with the sampling mark so that the gauge of the high temperature material is measured in accordance with the distance covered by the parallel motion of the light source and the camera tube.

Method and apparatus for non-contact measurement of a gauge of a high

In heating a material radiant at high temperatures, such as a steel product, in a heating furnace, the said material is charged into the heating furnace to heat. A discrimination mark is previously drawn on the surface of material to be discriminated on a portion readily watched from outside the furnace. A heat resisting paint sensitive to near ultraviolet rays is used to make the mark. The said material radiant-heated in the heating furnace is discriminated from outside the furnace as being radiant by applying near ultraviolet rays of a high pressure mercury lamp thereto from outside the furnace to provide a sharp contrast between the said material surface and the said discrimination mark for the discrimination of the said mark from outside the furnace.

Method for discriminating high-temperature red heated material

Growing community of inventors

Fukuyama, Japan

Yukio Hosaka