Fujikin Inc.

Other

Tadahiro Ohmi

Teruo Honiden

Nobukazu Ikeda

Akihiro Morimoto

Katunori Komehana

Yukio Minami

Kouji Kawada

Touru Hirai

Keiji Hirao

Osamu Nakamura

Toshirou Nariai

Masaharu Taguchi

Kenji Tubota

Michio Yamaji

A safe, reduced pressure apparatus for generating water vapor from hydrogen and oxygen and feeding high purity moisture to processes such as semiconductor production. The apparatus eliminates the possibility of the gas igniting by maintaining the internal pressure of the catalytic reactor for generating moisture at a high level while supplying moisture gas from the reactor under reduced pressure. A heat dissipation reactor improvement substantially increases moisture generation without being an enlargement in size by efficient cooling of the reactor alumite-treated fins.

Apparatus and reactor for generating and feeding high purity moisture

A reactor for generating moisture wherein ignition of hydrogen gas, backfire to the gas supply source side, the peeling off of the platinum coat catalyst layer inside are prevented more completely to further increase the safety of the reactor for generating moisture and wherein the dead space in the interior space is reduced to further reduce the size of the reactor shell. The reactor comprises: a reactor shell A with an interior space formed with a reactor structural component on the inlet side and a reactor structural component on the outlet side opposed to and united with each other by welding, the reactor structural componenton the inlet side provided with a gas feed portand the reactor structural componenton the outlet side provided with a moisture gas take-out port; a reflector on the inlet side facing the gas feed port in the interior space of the reactor; a reflector on the outlet side facing the moisture gas take-out port in the interior space; and a platinum coat catalyst layerformed on the inside wall of the reactor structural component on the outlet side, wherein hydrogen and oxygen fed into the interior space of the reactor through the gas feed port are brought into contact with the platinum coatto activate the reactivity, thereby reacting hydrogen and oxygen into water in a non-combustion state.

Reactor for generating moisture

A reactor for generating moisture wherein ignition of hydrogen gas, backfire to the gas supply source side, and the peeling off of the platinum coat catalyst layer inside are all prevented more completely to further increase the safety of the reactor for generating moisture, and wherein the dead space in the interior space is reduced to further reduce the size of the reactor shell. The reactor has a reactor shell A with an interior space; a reflector on an inlet side facing a gas feed port in the interior space of the reactor; a reflector on an outlet side facing a moisture gas take-out port in the interior space; and a platinum coat catalyst layer 8 formed on an inside wall of a reactor structural component on the outlet side. Hydrogen and oxygen fed into the interior space of the reactor react without combustion.

A grinding machine for welding electrodes comprises a housing , grinder motor , grinding disk , swing plate , holder guide , electrode holder , electrode turning motor and swing plate moving mechanism . The axis &phgr;a of electrode A extends along a line perpendicular to the axis &phgr; of motor drive shaft and first grinding part of the grinding disk is formed to conform to the finishing contour of electrode A. The grinding disk is turned by the grinder motor and at the same time electrode A is turned by the electrode turning motor. The grinding machine, using one grinding disk, grinds the end portion of an electrode to final form and finishes the tip end of the electrode to a mirror surface.

Grinding machine for welding electrodes

A gas detection sensor permits precise measurement of the concentration of flammable gas in a detection or subject gas and the concentration of oxygen in a detection gas containing flammable gases. In the sensor, the heating of the sensor by contact catalytic reaction of flammable gas gives off a detection signal of the flammable gas. The gas detection sensor has a first detection sensor including a diaphragm having a platinum coat on a side which the flowing detection gas comes in contact with, and a thermocouple having respective ends of two different metals placed close to each other and fixed on the side of the diaphragm not coming in contact with the flowing detection gas and which is heated by the contact catalytic reaction of flammable gas. A second detection sensor similar to the first detection sensor detects the temperature of the flowing detection gas.

Gas detection sensor

A method of removing moisture efficiently in the gas supply system by evacuation at normal temperature without using the baking method. The method involves flowing a gas to remove moisture in the gas supply system with the flow pressure of the gas to remove moisture set at not lower than a minimum pressure at which the gas flow becomes viscous and not higher than a water saturated vapor pressure at a flow temperature of the gas to remove moisture. The gas to remove moisture achieves a viscous flow when a mean free path of gas molecules is smaller than a diameter of piping of the gas supply system. If the gas for removing moisture is evacuated at normal temperature under such conditions, the adsorbed moisture on an inside surface of the piping and in the valves and filters can be removed effectively.

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Osaka, Japan

Teruo Honiden