Snow Brand Milk Products Co., Ltd.

Netsushin Co., Ltd.

Kazuichi Aoki

Yukihiro Saiki

Kensuke Itoh

Tomoshige Hori

Tetsuo Nakamura

Yasuhiko Shiinoki

Satoshi Nishimura

Katushtoshi Tanno

Tomosuke Imamura

Osato Miyawaki

An improved new type pyrometer and a method for fusing an alumina pipe having a high purity are disclosed. The temperature-measuring portion of the pyrometer includes a protective pipe made of alumina having a purity of at least 99.9% and a temperature-measuring resistance element of a platinum or platinum-rhodium resistance wire and a holding portion made of alumina having a purity of at least 99.9%. Owing to the use of high purity alumina, the platinum or platinum-rhodium resistance wire is not contaminated and has stable temperature characteristics at high temperatures. According to the method of this invention, an end of an alumina pipe having a purity of at least 99.9% can be fused without the aid of any binder by fusing the end while evacuating air from the alumina pipe through its opposite end.

Pyrometer and a method for fusing an alumina pipe having a high purity

In a subject fluid, there is placed an apparatus for measuring a change in state of the fluid, said apparatus having a tubular body which, in turn, contains therein at least one heating sensor employing so-called hot wire method. A quantity of the fluid is introduced into the tubular body and a temperature of the heating sensor is measured by the heating sensor itself as the quantity of the fluid having been introduced into the tubular body is maintained in a state of laminar flow or a static state. The laminar flow is generated by fluid impeller means such as impeller vane, screw-type vane or propeller vane assembly or uniaxial eccentric pump. The static state is maintained y providing gateway means for passage of the fluid into or out from the tubular body and closing such gateway means. A temperature of the fluid having been introduced into the tubular body and maintained in said laminar or static state is measured and discharged out from the tubular body upon completion of said temperature measurements. A change in state of the fluid is determined based on the temperatures of the fluid and the heating sensor.

Method and apparatus for measuring a change in state of a subject fluid

A sensor comprising a heating element and a temperature detecting element used to measure a temperature of the heating element are both held out of contact with each other within a sensor protecting tube. For fluid exhibiting slow changes in its state as time elapses, a fluid state is measured on the basis of a differential temperature between temperatures prior to and during heating of the heating element. For the fluid exhibiting rapid changes in its state as time elapses, the sensor is caused to generate heat while the temperature of this sensor is measured, and a separate temperature measuring sensor measures the temperature of the fluid. The fluid state is determined on the basis of the differential temperature between the temperatures of the sensor and the temperatures of the fluid.

Method and apparatus for fluid state determination

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Saitama, Japan

Kazuichi Aoki