Abstract: A phase modulation type fiber optic gyroscope having a greatly improved output stability without a large increase in the number of basic components of the gyroscope system. In accordance with the invention, the d.c. component of the output of a light detecting element which provides the two circulating beams is sensed and employed to control the output of the light-emitting element so as to be constant.
Type:
Grant
Filed:
December 17, 1985
Date of Patent:
September 5, 1989
Assignee:
Itaru Todoriki, Director-General, Agency of Industrial Science and Technology
Abstract: In a method and apparatus for continuous shaping of carbon-fiber-reinforced plastic tubes, a carbon fiber prepreg in tape form impregnated with a first thermosetting resin is laminated on and around a mandrel; the laminate provided on said mandrel is preheated; and the preheated laminate is pulled in and through a hot die together with the mandrel, during which it is gelled, cured, and shaped into a carbon-fiber-reinforced plastic tube, wherein a second thermosetting resin is uniformly supplied onto the outer circumference of the laminate in a resin squeezing zone in the hot die.
Abstract: A III-V semiconductor device is disclosed, which includes an emitter region, an emitter barrier region having such a barrier height as to substantially restrict a thermionic emission current as compared with a tunneling current and such a barrier width as to permit the tunneling current, a base region containing indium and having higher electron affinity than said emitter region and a collector barrier region having such a barrier height as to substantially prohibit a thermally distributed electron from overflowing and such a barrier width as to substantially prohibit the tunneling current.
Type:
Grant
Filed:
March 19, 1985
Date of Patent:
July 19, 1988
Assignee:
Director-General of the Agency of Industrial Science & Technology Itaru Todoriki
Abstract: A selective gas separator composed essentially of a reaction product of copper compound with an imidazole, a pyrazole, a triazole and/or a tetrazole.
Type:
Grant
Filed:
December 19, 1984
Date of Patent:
May 5, 1987
Assignee:
Itaru Todoriki, Director of Agency of Industrial Science and Technology
Abstract: A thin-film forming device has a support frame for supporting a substrate to be coated with a thin film, a reaction chamber having a space surrounded by the substrate supported on the support frame, side walls mounted under both sides of the substrate and a bottom wall mounted under the side walls, an atomizer for delivering an atomized solution of a material to be coated on the surface of the substrate, a heater disposed behind the substrate for heating the substrate to a temperature higher than a reaction temperature of the material, and a nozzle connected to the atomizer and disposed in the reaction chamber in facing relation to the substrate for spraying the atomized solution toward the surface of the substrate, and cooling means for cooling at least an inside portion of the bottom wall in facing relation to the substrate to a temperature below the reaction temperature of the material.
Abstract: A process for preparing lower olefin using a calcium phosphate modified zeolite type catalyst is disclosed which is capable of reducing the decomposition of methanol into CO and CO.sub.2 and increasing the olefin selectivity. In the process, the reaction of methanol and/or dimethyl ether is carried out in the presence of an aluminosilicate zeolite-type catalyst which has a Ca-containing compound and a P-containing compound contained therein in predetermined amounts.