Kohoku Kogyo Co.

Takatsuki, Japan

Kohoku Kogyo Co.

Takatsuki, Japan
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Patent
Kohoku Kogyo Co. | Date: 2016-08-10

Provided is a method for manufacturing a tab terminal for an electrolytic capacitor which can suppress the production of whiskers and is environmental friendly after welding. The method for manufacturing a tab terminal for an electrolytic capacitor comprising an aluminum core wire and a lead wire includes: joining one end of the aluminum core wire and one end of the lead wire by welding to form a joined body; washing the joined body in a washing tank; coating a composition for an ultraviolet cured resin onto a weld zone of the washed joined body; and irradiating the coated portion with ultraviolet light to form a covering of the ultraviolet cured resin. The method is characterized in that a washing solution is circulated through a magnetic filter in the washing tank, and that an alloy or intermetallic compound of Fe and a metal selected from the group consisting of Cu, Sn, Al, Bi and Ni, which has been produced by washing of the joined body, is removed by the magnetic filter.


Patent
Kohoku Kogyo Co. | Date: 2012-08-22

Provided are a tab terminal that, even when a lead-free tin-plated lead wire as such is used in a tab terminal, does not produce tin whiskers from a weld zone and is environmentally friendly, and a method for manufacturing the same. The terminal for an electrolytic capacitor comprises a lead wire having a lead-free tin-plated surface and an aluminum core wire that has a press flattened portion and is welded to the lead wire, wherein a portion in the vicinity of a weld zone between the lead wire and the aluminum core wire is covered with an ultraviolet cured resin.


Provided is an optical connector that can optically couple a multi-core fiber and single-mode fibers with a high efficiency. The optical connector connects: N (N is an integer of 3 to 14) single-mode fibers each including one core with a high refractive index, in a cladding material with a low refractive index; to a multi-core fiber including N cores with high refractive indexes in a cladding material with a low refractive index such that the cores of the single-mode fibers are respectively optically coupled to the cores of the multi-core fiber. The optical connector includes: a quartz glass cylinder having a first end face to be in contact with the multi-core fiber and a second end face to be in contact with the single-mode fibers; and N glass fibers that are arranged in the quartz glass cylinder so as to extend from the first end face to the second end face, the N glass fibers each including: a circular rod with a high refractive index that has a constant outer diameter; and a low refractive index material that surrounds an outer periphery of the circular rod and has a constant thickness.


The present invention provides a method for manufacturing an optical fiber base material and an optical fiber base material, the method including: arranging a rod containing SiO_(2 )family glass for core, in a container; pouring a SiO_(2 )glass raw material solution for cladding layer and a hardener into the container, the glass raw material solution containing a hardening resin; solidifying the glass raw material solution through a self-hardening reaction; and then drying the solidified material and heating the solidified material in chlorine gas, to manufacture an optical fiber base material in which a SiO_(2 )cladding layer is formed in an outer periphery of the rod containing SiO_(2 )family glass for core.


A connector component for optical fibers has good dimensional accuracy and parallelism. The connector component includes a base material. The base material is provided with at least two holes for inserting and fixing optical fibers therein. The base material is made of quartz glass. Inner components are arranged for forming holes for inserting optical fibers in a die for forming an outer form of the connector component with a dimensional accuracy equal to or less than 2 m. Slurry is poured into the die, the slurry including quartz powder, a resin binder, a dispersant, water and a curing agent. The poured slurry is cured and heated under vacuum so as to vitrify the cured slurry to obtain the quartz glass.


Provided is an optical connector that can optically couple a multi-core fiber and single-mode fibers with a high efficiency. The optical connector connects: N (N is an integer of 3 to 14) single-mode fibers each including one core with a high refractive index in a cladding material with a low refractive index; to a multi-core fiber including N cores with high refractive indexes in a cladding material with a low refractive index such that the cores of the single-mode fibers are respectively optically coupled to the cores of the multi-core fiber. The optical connector includes: a quartz glass cylinder having a first end face to be in contact with the multi-core fiber and a second end face to be in contact with the single-mode fibers; and N glass fibers that are arranged in the quartz glass cylinder so as to extend from the first end face to the second end face, the N glass fibers each including: a circular rod with a high refractive index that has a constant outer diameter; and a low refractive index material that surrounds an outer periphery of the circular rod and has a constant thickness.


Patent
Yokohama National University and Kohoku Kogyo Co. | Date: 2011-12-07

Provided is a paint set that can allow optimal colors to be easily selected, mixed and arranged and, at the same time, can attain a learning effect about three attributes of colors or a hue circle even during work production. A plurality of chromatic color paints each having a hue are arranged circularly in a storage case to constitute a hue circle.


Patent
Kohoku Kogyo Co. | Date: 2014-08-07

An optical device including a Faraday rotator, wherein the Faraday rotator includes a Faraday element 31 made of a magnetooptical material 34, two permanent magnets 35, and an electromagnet 20a, with a direction of travel of light as a front-rear direction, the Faraday element includes light incident/emission surfaces in front and rear, and surfaces parallel to each other in left and right, the plate-shaped permanent magnets are attached to each of left and right side surfaces of the Faraday element such that different magnetic poles are opposed to each other, and the permanent magnets are configured to apply a permanent magnetic field to the Faraday element in one direction of a left direction and a right direction, a shaft part 10 that holds the Faraday element, attached with the permanent magnets, over an entire length in the front-rear direction is included, the electromagnet is configured including a coil made by winding a conductor 21 around a periphery of the shaft part with the front-rear direction as an axis, and the electromagnet is configured to apply to the Faraday element a variable magnetic field in the front-rear direction.


Patent
Kohoku Kogyo Co. | Date: 2016-06-15

An optical device including a Faraday rotator, wherein the Faraday rotator includes a Faraday element 31 made of a magnetooptical material 34, two permanent magnets 35, and an electromagnet 20a, with a direction of travel of light as a front-rear direction, the Faraday element includes light incident/emission surfaces in front and rear, and surfaces parallel to each other in left and right, the plate-shaped permanent magnets are attached to each of left and right side surfaces of the Faraday element such that different magnetic poles are opposed to each other, and the permanent magnets are configured to apply a permanent magnetic field to the Faraday element in one direction of a left direction and a right direction, a shaft part 10 that holds the Faraday element, attached with the permanent magnets, over an entire length in the front-rear direction is included, the electromagnet is configured including a coil made by winding a conductor 21 around a periphery of the shaft part with the front-rear direction as an axis, and the electromagnet is configured to apply to the Faraday element a variable magnetic field in the front-rear direction.


The present invention provides a method for manufacturing an optical fiber base material and an optical fiber base material, the method including: arranging a rod containing SiO_(2) family glass for core, in a container; pouring a SiO_(2) glass raw material solution for cladding layer and a hardener into the container, the glass raw material solution containing a hardening resin; solidifying the glass raw material solution through a self-hardening reaction; and then drying the solidified material and heating the solidified material in chlorine gas, to manufacture an optical fiber base material in which a SiO_(2) cladding layer is formed in an outer periphery of the rod containing SiO_(2) family glass for core.

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