Manufacture of a flexible stranded body
    41.
    发明公开
    Manufacture of a flexible stranded body 失效
    柔韧的身体的制造

    公开(公告)号:EP0050495A3

    公开(公告)日:1982-06-09

    申请号:EP81304842

    申请日:1981-10-16

    Applicant: BICC Limited

    Abstract: An overhead electric conductor with optical fibres 3 loosely housed in the bore of a central core 1, which bore also contains a greasy water-impermeable medium 4, is manufactured by causing a preformed elongate metal member 2 of U-shaped transverse cross-section and the optical fibres to advance in the direction of their lengths, the rate of advance of the fibres being restrained. As the U-shaped elongate member 2 is transversely folded around the optical fibres 3, greasy water-impermeable medium 4 is injected into the bore of the elongate metal member 2 under a controlled pressure. The consistency of the greasy water-impermeable medium 4, the pressure and rate at which it is injected into the bore and the degree of restraint imparted to the optical fibres 3 is such that, in a predetermined length of the conductor, the length of the optical fibres exceeds the length of the bore by a controlled extent, preferably 1 to 3%.

    An improved optical fibre ribbon structure
    43.
    发明公开
    An improved optical fibre ribbon structure 失效
    改进的光纤纤维结构

    公开(公告)号:EP0104864A3

    公开(公告)日:1986-03-19

    申请号:EP83305505

    申请日:1983-09-20

    CPC classification number: G02B6/448 G02B6/4403

    Abstract: In a simple and inexpensive method of manufacturing an optical fibre ribbon structure 11, several optical fibres 1 (and if desired one or more than one flexible reinforcing element) are arranged to travel side by side and an overall coating 3 of plastics material is applied to the advancing optical fibres to form a plastics coated optical fibre array 4. This array is fed between a pair of advancing tapes 5 and the advancing taped plastics coated optical fibre array 8 is subjected to a curing operation to cure the plastics material and cause it to bond to the embedded optical fibres 1 and lightly to the tapes 5. The tapes 5 are then peeled away from the array to form an optical fibre ribbon structure 11. The plastics material of the overall coating Is preferably an acrylate or other plastics material that can be cured by ultra-violet radiation.

    Penetration assembly for an optical fiber cable
    44.
    发明公开
    Penetration assembly for an optical fiber cable 失效
    透光组件用于光纤电缆

    公开(公告)号:EP0096580A3

    公开(公告)日:1986-02-26

    申请号:EP83303274

    申请日:1983-06-07

    CPC classification number: G02B6/4428

    Abstract: A penetration assembly for an optical fiber cable comprises a pair of axially-aligned cylindrical sleeves 13 surrounding an optical fiber cable 6. An air-tight seal is formed between the optical fiber cable and the sleeves by means of glass connectors 16 connected to the optical fiber cable and flexible metal connectors 15 connected between the glass connectors and the inside of the sleeves. Each glass connector 16 comprises a plurality of cylindrical sections each having a different coefficient of thermal expansion having a value between that of the optical fiber cable 6 and that of the flexible metal connector 15. The coefficient of thermal expansion of the glass connector 16 changes in a stepwise manner from the section connected to the optical fiber cable 6 to the section connected to the flexible metal connector 15. This step-wise change in coefficient of thermal expansion reduces the thermal stresses exerted on each section and prevents cracks due to thermal stress, a common problem with the resinous materials presently used to form air-tight seals in penetration assemblies. Since the air-tight seal between the optical fiber cable and the sleeves is formed from glass and metal, it is more resistant to radiation than presently used seals formed from resinous materials.

    Laying of optical waveguides onto a support filament
    46.
    发明公开
    Laying of optical waveguides onto a support filament 失效
    将光波导置于支持光纤上

    公开(公告)号:EP0113973A3

    公开(公告)日:1985-12-04

    申请号:EP83307589

    申请日:1983-12-13

    CPC classification number: G02B6/4491 G02B6/449

    Abstract: © Apparatus for laying of optical waveguides (16) into sinuous grooves (52) of a support filament (10) in which a laying device surrounding a feed path for the filament has a plurality of elongate guide elements (56) for the waveguides, the elements extending downstream from a carrier (42) and being inclined to the feed path to terminate in free inner ends. The guide elements are rigid and are allowed by the carrier to have lateral swinging movement to enable their free ends to follow the path of a groove in the support filament as it moves along its feed path. A groove locating projection (50) is provided to maintain positional relationship between the carrier and support filament as the filament passes the carrier.

    Fiber optic cable and core
    48.
    发明公开
    Fiber optic cable and core 失效
    光纤电缆和核心

    公开(公告)号:EP0048674A3

    公开(公告)日:1982-06-09

    申请号:EP81401466

    申请日:1981-09-22

    CPC classification number: G02B6/4415 G02B6/4413 G02B6/443

    Abstract: A cable adapted for well logging has an optical fiber core in which the optical fibers are protected from moisture and non-uniform stresses by first wrapping the fibers in a helical spiral around a solid, soft, deformable core material and then blanketing them with more of the same. Next the blanketed core is closely and tightly wound with several overlapping layers of a metallic tape jacket. The jacket buffers radial loads applied by other portions of the cable and forms a barrier against moisture penetration. The soft core and blanket have properties close to a liquid so that only uniform, essentially hydrostatic stresses are transmitted to the optical fibers.

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