Horiba, Ltd.

Masahiro Tanimoto

Takeshi Yamada

Hideki Ohashi

Katsuya Tsuji

Yoshinori Hosokawa

Akihiro Hirano

A combustion furnace having a cylindrical filter arranged to pass gases between a combustion cylinder and a gas analyzer attached to an output port on the furnace. The gases to be analyzed are generated from a sample burned in the combustion cylinder and removed through the filter. A cleaning gas supply port and supply line for supplying a cleaning gas to the inside of the furnace are provided. The cleaning gas is under pressure and may be oscillated to assist in the removal of dust stuck to the filter and the interior of the furnace. The improved dust removal provides for a much cleaner furnace and a more accurate analysis of the sample.

Combustion furnace for burning sample to be analyzed

A gas analyzer for simultaneously measuring a plurality of ingredients of a sample gas has a sample gas-introducing passage, a sample gas, flow-divider connected to the gas-introducing passage for dividing the sample gas into a plurality of gas flows in a desired flow-dividing ratio, a sample gas-diluter connected to the flow-divider for diluting the plurality of divided sample gas flows, and a plurality of gas concentration detectors, one for each gas flow, and connected in parallel with each other to said sample gas-diluter for receiving the respective diluted gas flows from the sample gas-diluter.

Gas analyzer for simultaneously measuring many ingredients

A crucible cassette for use in feeding crucibles to an apparatus for loading and feeding crucibles to a combustion furnace, said cassette having at least one crucible receiving tube capable of receiving a plurality of crucibles stacked one above the other, an engaging member in the bottom of the tube for engaging with the lowermost crucible and supporting it in the receiving tube and a guide member for guiding the rise of the crucibles in the tube, and a pusher for pushing crucibles one by one up out of said tube to enable them to be carried one by one from the cassette means to a sample weighing position in the apparatus.

Crucible cassette for automatic apparatus for analyzing metals

A gas doser, including a gas input member, a gas output member and a charge-over rotor therebetween. The input member includes a gas input member having a carrier gas input port, a calibrating gas input port, a first chamber communicating with the carrier gas input port and a second chamber communicating with the calibrating gas input port. The output member has a carrier gas output port and a calibrating gas output port, respectively communicating with a third chamber and a fourth chamber. The rotor has a carrier gas ventilating conduit for providing communication between the first chamber and the third chamber, and calibrating gas measuring conduits for providing communication between the second chamber and the fourth chamber. Opposite ends of the ventilating conduit and the measuring conduits are mutually spaced from each other about the rotor axis at equal distances from the axis. The rotor is successively rotatable between a first position in which the second chamber communicates with the fourth chamber through the ventilating conduit, and second positions in which the first chamber communicates with the third chamber through a successively increasing number of the measuring conduits. With this structure, it is possible to selectively provide doses of calibrating gas in differing predetermined concentrations in a carrier gas simply by adjusting the rotational position of the rotor.

Gas doser

A furnace for extracting gaseous components from material samples includes upper and lower electrodes mounted to press therebetween a crucible of electrically conductive material. An electric current is applied to the electrodes, thereby causing heating of the material sample contained in the crucible, with the result that gaseous components are extracted from the material sample. At least one of the upper and lower electrodes is rotated about a vertical axis, thereby causing surfaces of the crucible contacting respective surfaces of the upper and lower electrodes to rotate under friction against such respective surfaces, thereby improving electrical contact between the crucible and the electrodes.

Extractive furnace for extracting gaseous components from material

An automatic apparatus for loading and feeding crucibles to and removing crucibles from a combustion furnace in which metals are burned for analyzing them. The apparatus has a part for automatically transporting crucibles to a sample weighing position one by one, a sample weighing device at the sample weighing position, and a supply device for placing the desired quantity of metal to be analyzed into crucibles at the sample weighing position. A storage device for automatically storing crucibles containing samples therein extends from the sample weighing position, and a device takes crucibles out of the storage device one by one and a further device automatically takes the crucibles from said taking out device and introduces them into a combustion furnace and removes the crucibles from the combustion furnace. A device then automatically dumps the crucibles removed from the combustion furnace after the completion of analysis. The storage device has a carrying trough for holding a line of crucibles, a stop at the downstream end of the carrying trough and movable into and out of engagement with the crucible at the downstream end of the carrying trough, and a pusher for pushing crucibles from the sample weighing position along the carrying trough and having a device for discontinuing the pushing action of said pusher when a crucible being pushed engages the stop or a crucible preceeding a crucible stopped by the stop.

Automatic apparatus for analyzing metals

An automatic cleaning device is employed in an extracting furnace of an apparatus for analyzing gases in metals, the furnace including upper and lower electrodes relatively movable between a closed position, whereat a crucible containing a sample to be analyzed may be contacted and heated by the electrodes, and an open position, whereat the electrodes are spaced from each other. The automatic cleaning device cleans the upper and lower electrodes and includes a support bracket mounted for movement laterally of the electrodes. A cleaning unit is supported on the support bracket and is movable thereby between a first position located laterally of the electrodes and a second position located between the electrodes. The cleaning unit includes a crucible removal device to remove a spent crucible from the electrodes upon movement of the cleaning unit to the second position thereof. The cleaning unit includes upper and lower brushes rotatable to clean the upper and lower electrodes. The cleaning unit is mounted on the support bracket for vertical movement relative thereto. Thus, when the cleaning unit is in the second position thereof, relative movement between the upper and lower electrodes toward the closed position thereof causes the cleaning unit to be moved vertically until the upper and lower cleaning brushes are contacted with and clean the upper and lower electrodes.

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Kyoto, Japan

Masahiro Tanimoto