Hitachi, Ltd.

Atsushi Miki

Etsunori Mori

Masaru Higaki

Yoshiyuki Kubota

Minoru Hoshi

Kouji Sasaki

Yukio Kawakubo

Satoshi Ogura

Norihira Uozumi

Yasuyuki Tsutsumi

Koji Amakawa

A novel gas laser apparatus is disclosed, which comprises a hermetic container with a gas laser medium sealed therein, a plurality of main discharge electrodes arranged in the hermetic container for causing the main discharge in the gas laser medium thereby to generate a laser beam, and a device for subjecting the discharge space between the main discharge electrodes to preionization over a wide range thereof before the main discharge by use of a reflected laser beam or an ultraviolet ray lamp.

High-pressure gas laser apparatus and method of laser processing

An electrolyte-type fuel cell, i.e., a fuel cell using a liquid electrolyte, which comprises at least one unit cell comprising a matrix for retaining a liquid electrolyte and a pair of gas diffusible electrodes each having a gas flow passage and provided at both sides of the matrix and in direct contact with the matrix, and a pair of gas supply-discharge means for supplying and discharging a necessary gas to and from the gas passages of the corresponding gas-diffusible electrodes of the unit cell, at least one of the gas passages of the gas-diffusible electrodes being communicated with the matrix through at least one liquid electrolyte passage, at least one demister being provided in the gas flow passage and on the liquid electrolyte passage exposed in the gas flow passage, and a means for generating electrolyte mists being provided at the supplying side of at least one of the gas supply-discharge means can supply a liquid electrolyte to the matrix with a high trapping efficiency of liquid electrolyte mists.

Fuel cell using liquid electrolyte

A winding for a static induction apparatus such as a transformer, a reactor and the like comprises a plurality of interleaved coils each formed by winding an electrically insulated strand conductor in a radial spiral. The coils are stacked axially and electrically connected in series between a line terminal and another terminal such as a neutral terminal. The winding is divided into a plurality of blocks each including a plurality of ones of the interleaved coils. The number of turns of each coil belonging to the block on the other terminal side is decreased as compared with that of each coil belonging to the block located closer to the line terminal, to thereby reduce the series electrostatic capacitance of the coils stepwise from one to another block starting from the one located on the line terminal side. The distribution constant is thus decreased. Favorable surge withstanding characteristics are attained, reliable insulation is assured and the winding can be realized in a reduced size.

Winding for static induction apparatus

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Katsuta, Japan

Atsushi Miki