Abstract: Anticorrosion copper alloy essentially consisting of 4.5-32 wt % of Ni, 0.3-2.5 wt % of Fe, one or more elements selected from 0.01-1.0 wt % of In, 0.003-0.2 wt % of Pd and 0.003-0.1 wt % of Pt, and the balance of Cu and normal impurities. Further, an anticorrosion copper alloy essentially consisting of 4.5-22 wt % of Ni, 1.3-2.5 wt % of Fe, one or more elements selected from 0.1-1.0 wt % of In, 0.01-0.2 wt % of Pd and 0.01-0.1 wt % of Pt, and the balance of Cu and normal impurities; and said Fe being kept in a state of solid solution in a matrix of said copper alloy.
Type:
Grant
Filed:
November 10, 1982
Date of Patent:
September 27, 1983
Assignee:
The Furukawa Electric Company, Ltd.
Inventors:
Yoshihisa Toda, Hiroshi Yamamoto, Kenzi Sata
Abstract: This invention relates to an improvement in a heat exchanger of the type using heat pipes which permits reduction in size of the heat exchanger and enhancement in heat exchange efficiency and more particularly to a cylindrical heat exchanger principally comprising a cylindrical or polygonal tubular casing provided with openings in the middle parts of its upper and lower sides and in its circumferential side, a transverse partition plate which divides the inside of the casing into upper and lower parts and a group of vertical heat pipes arranged to pierce through the peripheral portion of the partition plate in an annular plan configuration as a whole.
Type:
Grant
Filed:
November 7, 1979
Date of Patent:
May 4, 1982
Assignee:
The Furukawa Electric Company, Ltd.
Inventors:
Tatsuya Koizumi, Shuichi Furuya, Koji Matsumoto, Kensuke Karasawa
Abstract: A galvanic cell separator composed of polyvinyl alcohol having a crystallinity of 0.4 or more to be used with a galvanic cell containing alkaline electrolyte, and a method of manufacturing the same.
Type:
Grant
Filed:
August 13, 1979
Date of Patent:
July 7, 1981
Assignees:
The Furukawa Electric Company, Ltd., The Furukawa Battery Co.
Abstract: This invention relates to an improvement in a heat exchanger of the type using heat pipes which permits reduction in size of the heat exchanger and enhancement in heat exchange efficiency and more particularly to a cylindrical heat exchanger principally comprising a cylindrical or polygonal tubular casing provided with openings in the middle parts of its upper and lower sides and in its circumferential side, a transverse partition plate which divides the inside of the casing into upper and lower parts and a group of vertical heat pipes arranged to pierce through the peripheral portion of the partition plate in an annular plan configuration as a whole.
Type:
Grant
Filed:
February 3, 1978
Date of Patent:
June 10, 1980
Assignee:
The Furukawa Electric Company Ltd.
Inventors:
Tatsuya Koizumi, Shuichi Furuya, Koji Matsumoto, Kensuke Karasawa
Abstract: A power cable having a plastic electrical insulation which is partially or wholly composed of a plastic compound. The plastic compound containing an inorganic or organic electrolyte which ionizes when dissolved in water, the power cable prevents the deterioration of insulation called "water tree" which has been a fatal drawback of the plastic insulation layers of the conventional plastic insulated cables such as cross-linked polyethylene cables, etc.