Showa Denko K.k.

Showa Denko Kabushiki Kaisha

Erma Optical Works, Ltd.

Sadao Sumikama

Kozo Shirato

Yoshiaki Arakawa

Kazuo Hiraizumi

Shigeru Nakamura

Nobuyoshi Tanaka

Tsuyoshi Yamada

Mitsuru Taguchi

Susumu Ishiguro

Nobuo Takasu

Katsushi Akama

Disclosed herein is a high-sensitivity differential refractometer which is characterized by having a light source disposed outside a housing, a reflecting mirror attached at the end portion thereof to a reflecting mirror-supporting plate connected with the end of a movable plate, said movable plate being so constructed as to rotate around a vertical axis and permit free change of the angle formed between said reflecting mirror-supporting plate and the movable plate, a twisting member disposed inside a lead-in tube and said lead-in tube fastened to a removable case and built in a metallic block inside the housing.

High-sensitivity differential refractometer

The coefficient of thermal conductivity of any sample can be measured without any pre-processing to the sample by putting an electric heater and a thermo-electric couple between a block made of reference material whose coefficient of thermal conductivity is known and the sample, flowing electric current in said heater, measuring the temperature of said heater with said thermo-couple, and calculating the coefficient of thermal conductivity of the sample according to the measured data. The present inventors introduce herein a novel equation for that calculation.

Method and apparatus for measuring the coefficient of thermal

Growing community of inventors

Yokohama, Japan

Sadao Sumikama