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1. 发明专利

JPH06201956A OPTICAL FIBER CABLE 失效
公开(公告)号：JPH06201956A
公开(公告)日：1994-07-22
申请号：JP35937192
申请日：1992-12-25
申请人： SUMITOMO ELECTRIC INDUSTRIES , NIPPON TELEGRAPH & TELEPHONE
发明人： SAOTOME HIROYUKI , SAKATA YASUO , MATSUO TOSHINOBU , SATANI HIROSHI , UESUGI MIKIHIRO , KIYOSUE SHUSUKE
IPC分类号： G02B6/44
摘要： PURPOSE:To provide the optical fiber cable having a small diameter, high density, excellent transmission characteristic and high reliability by providing a coated optical fiber ribbon with a protective film, arranging tensile bodies on the same plane of the coated optical fiber ribbon and applying an external coating later integrally on the fiber ribbon and the tensile bodies. CONSTITUTION:This optical fiber cable is constituted by arranging the tensile bodies 3 consisting of steel wires, etc., in parallel apart a spacing on the same plane as the coated optical fiber ribbon 1 on both-sides of the coated fibers having a resin protective layer 2 consisting of a resin such as polyamide resin or BPT having >=50kgf/mm tensile strength formed on the outer periphery of the coated optical fiber ribbon 1 and integrally applying the external coating layer 4 of polyethylene, vinyl chloride, etc., on the coated fibers and the tensile bodies, respectively. The optical fiber cable may be otherwise constituted by arranging two lines of the coated fibers applied with the resin protective layers 2 on the outer peripheries of the coated optical fiber ribbons 1 in parallel keeping a space on the same plane, positioning the tensile body 3 between the respective coated fibers and integrally applying the external coating layer of an elliptic shape on these coated fibers and the tensile body.

2. 发明专利

JPH07248438A AERIAL OPTICAL CABLE 失效
公开(公告)号：JPH07248438A
公开(公告)日：1995-09-26
申请号：JP6755394
申请日：1994-03-11
申请人： SUMITOMO ELECTRIC INDUSTRIES , NIPPON TELEGRAPH & TELEPHONE
发明人： SAKATA YASUO , KIYOSUE SHUSUKE
IPC分类号： G02B6/44
摘要： PURPOSE:To provide an aerial optical cable which does not apply a tensile strain on optical fibers at the time of installing the cable, is easily producible and is excellent in cost-effectiveness. CONSTITUTION:The aerial optical cable is formed by inserting a plastic pipe 2 having a slit 2a in a longitudinal direction outside an optical fiber unit 1 which has a tensile body 13 at its center and is housed with the optical fibers 14 in the slots 12 of a slot rod 11 having plural slots 12 on its outer periphery in the state of maintaining a clearance in such a manner that the friction force with the optical fiber unit 1 attains 0 to 15kg/m, arranging both in parallel apart a spacing from a supporting wire 3 and integrally forming a sheath 4 on the outer side thereof to a pick-a-back type sectional shape.

3. 发明专利

JPS6294807A TWO-CORE OPTICAL FIBER CABLE 失效
公开(公告)号：JPS6294807A
公开(公告)日：1987-05-01
申请号：JP23566785
申请日：1985-10-21
申请人： SUMITOMO ELECTRIC INDUSTRIES , NIPPON TELEGRAPH & TELEPHONE
发明人： SAKATA YASUO , TANAKA TAKASHI , UCHIOKE FUMIKIYO , TANAKA KAZUHIKO , WATANABE ICHIRO
IPC分类号： G02B6/44 , G02B6/46
摘要： PURPOSE:To easily lead out an optical fiber and work its terminal by making two cut grooves in a coating layer which covers two optical fibers arranged in parallel and reinforcing cores on both their sides. CONSTITUTION:The two optical fibers 1 are arranged in parallel to each other, the reinforcing cores 2 are arranged on both their sides at intervals, and their outside is covered with the plastic coating layer 3. Then, the cut grooves 4 are made in the coating layer 3 on the line which is perpendicular to the line connecting the optical fibers 2 and reinforcing cores 3 and contains the optical fibers. Therefore, the optical fibers are easily led out and their terminals are easily worked, thereby realizing two-way transmission without using any multiplexer demultiplexer.

4. 发明专利

JPH07113932A SPACER FOR AERIAL OPTICAL CABLE 失效
公开(公告)号：JPH07113932A
公开(公告)日：1995-05-02
申请号：JP28442993
申请日：1993-10-18
申请人： SUMITOMO ELECTRIC INDUSTRIES , NIPPON TELEGRAPH & TELEPHONE
发明人： NIIYAMA SHINSUKE , SAKATA YASUO , YOSHIOKA KENJI
IPC分类号： G02B6/44 , H01B5/08 , H01B11/22
摘要： PURPOSE:To provide the spacer for aerial optical cables constituted to apply a required sag to a cable body without changing the mold intervals of the conventional cables even if the rigidity of the cable is increased by formation of the cables to more multiplefibers and larger outside diameters. CONSTITUTION:This spacer for aerial optical cables is formed of a thermoplastic resin which has a tensile body 1 existing at its center and has optical fiber housing grooves 3 on its outer periphery. The inside layer resin 2a of the spacer for aerial optical cables described above is composed of a polyolefin resin of a density =0.93. The ratio of the apparent outside diameters of the inside layer and the outside layer is

5. 发明专利

JPH0194308A FAN OUT CONNECTOR 失效
公开(公告)号：JPH0194308A
公开(公告)日：1989-04-13
申请号：JP25311287
申请日：1987-10-07
申请人： SUMITOMO ELECTRIC INDUSTRIES , NIPPON TELEGRAPH & TELEPHONE
发明人： SAKATA YASUO , AMANO YOSHIKAZU , SAKUTA KOJI
IPC分类号： H04B10/25 , G02B6/293 , G02B6/34 , G02B6/38 , H04B10/071 , H04B10/077 , H04B10/29
摘要： PURPOSE:To superpose or separate a test optical signal on or from a transmission optical signal in each coated optical fiber by providing a multilayered film filter which superposes and separates the test optical signal on and from the transmission optical signal. CONSTITUTION:The transmission optical signal is transmitted to a coated optical fiber 1 or is transmitted reverse on the same route, and the test optical signal is transmitted to a coated optical fiber 1' through a test optical signal port 5 or is transmitted reverse on the same route. A multilayered film filter 6 having a wavelength selectivity is used for superposition and separation between the optical signal used for transmission and that used for test. The transmission optical signal is transmitted from the coated optical fiber 1 to a coated optical fiber 1'' or from the coated optical fiber 1'' to the coated optical fiber 1 through the multilayered film filter 6 and the test optical signal has a wavelength different from that of the transmission optical signal and is reflected by the multilayered film filter 6 to change the direction and is transmitted from the coated optical fiber 1' to the coated optical fiber 1'' or from the coated optical fiber 1'' to the coated optical fiber 1'. Thus, the test optical signal is superposed or separated.

6. 发明专利

JPH08313773A PIPELINE FOR OPTICAL FIBER CABLE 失效
公开(公告)号：JPH08313773A
公开(公告)日：1996-11-29
申请号：JP11809195
申请日：1995-05-17
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： SAKATA YASUO
IPC分类号： G02B6/46 , G02B6/44 , H02G1/06
摘要： PURPOSE: To improve a preserving property of a shape as against an external pressure by forming the cross sections of plural tubular bodies in a pipeline to be inserted with an optical fiber cable by force feeding air to a circular shape in the hollow parts on the inner side and to an approximately trapezoidal shape in the external shape. CONSTITUTION: This pipeline is obtd. by assembling and forming the tubular bodies 1 around a tension member 3 consisting of a stainless steel or 'Kevlar (R)', etc., and providing the outermost layer with a sheath 2 in order to insert the optical fiber cable by the force feeding air. The cross sections of the tubular bodies 1 are formed to the circular shape in the hollow parts 5 on the inner side and to approximately the trapezoidal shape in the external shape. The tubular bodies 1 are formed by extrusion molding of resins having a density of >=9gr/cm and melt flow rate of

7. 发明专利

JPH06118287A PIPE, TRANSMISSION CABLE USING IT, AND ITS DIAGNOSTIC METHOD 失效
公开(公告)号：JPH06118287A
公开(公告)日：1994-04-28
申请号：JP26575192
申请日：1992-10-05
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： SAKATA YASUO
IPC分类号： G01B11/30 , G02B6/02 , G02B6/44
摘要： PURPOSE:To feed a laser beam to detecting fibers after pipe cables are installed, measure the reflected light, and diagnose the state of the cables by inserting transmission lines into the pipes, and burying the detecting optical fibers in the pipes over the whole length. CONSTITUTION:A transmission cable is arranged with a tensile strength wire 1 at the center and six pipes 2, 2... around it, they are covered with a plastic sheath 4, detecting optical fibers 3 are spirally buried against the longitudinal axis of the pipes 2, 2... at the thick internal sections of the pipes 2, 2..., and transmission lines 5 are inserted into the pipes 2, 2.... A laser beam 11 is fed to the detecting fibers 3 after the pipe cables are installed, the reflected light 13 is measured, and the state of the cables can be diagnosed (when external pressure is locally applied to a cable or the cable is bent at the curvature smaller than the specified one, the light reception level of the reflected light of the detecting fiber 3 at this portion is decreased, for example).

8. 发明专利

JPH04349407A NON-HALOGEN FLAME-RETARDANT FLAT TYPE OPTICAL CABLE 失效
公开(公告)号：JPH04349407A
公开(公告)日：1992-12-03
申请号：JP15263591
申请日：1991-05-27
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： SAKATA YASUO , SAOTOME HIROYUKI
IPC分类号： G02B6/44
摘要： PURPOSE:To improve flexibility and to obviate the generation of harmful gases at the time of combustion by enclosing optical fiber cords with aluminum tapes having adhesive layers on both surfaces to adhere the fiber cords to the inside surfaces and coating the entire part with non-halogen flame-retardent polyethylene (PE). CONSTITUTION:Tensile fibers 2 are applied longitudinally along the outer periphery of a coated optical fiber 1 and further a sheath 3 consisting of PVC is applied on the outer periphery thereof to constitute the optical fiber cord. Two pieces of such optical fiber cords are prepd. and are housed into the recessed parts of the laminated aluminum tapes 4 which have a hollow shape in section, are disposed in parallel and have the adhesive layers on both surfaces. The optical fiber cords and the laminated aluminum tapes 4 are not adhered over the entire surface and are adhered and held in the state of line contact. These cords are then integrally coated with the non-halogen flame-retardent PE 5, by which the entire part of the cable is constituted.

9. 发明专利

JPS5849906A CABLE CONTAINING MIXTURE 失效
公开(公告)号：JPS5849906A
公开(公告)日：1983-03-24
申请号：JP14849481
申请日：1981-09-19
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： SASAGAWA MASAO , SAKATA YASUO
IPC分类号： H01B7/282 , G02B6/44
摘要： PURPOSE:To prevent the increment of the transmission loss of an optical fiber due to the increment of the pressure of a mixture, by inserting spongy and rubbery materials, which change the volume by pressure, into the mixture to absorb the increment of the pressure of the mixture in respect to a cable containing an optical fiber core where the waterproof mixture is packed. CONSTITUTION:A pressure absorbing member 23 is wound as upper winding materials into a tape to wrap an optical fiber 21 and a mixture 22 or is arranged cylindrically to wrap them, thus inserting a pressure absorbing member 3 into the cable. Normally, the pressure absorbing member consists of a flexible plastic, polyurethane, or the like which has a force to put back the fluid mixture after the deformation or the like to the pressure is removed. Thus, the increment of the pressure of the mixture is absorbed to prevent the increment or the like of the transmission loss of the optical fiber.

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