公开(公告)号：US4723831A

公开(公告)日：1988-02-09

申请号：US803628

申请日：1985-12-02

申请人： Brian D. Johnson ,  William C. Reed ,  Carla G. Wilson

发明人： Brian D. Johnson ,  William C. Reed ,  Carla G. Wilson

IPC分类号： G02B6/44

CPC分类号： G02B6/443 ,  G02B6/4401 ,  G02B6/4432 ,  G02B6/4436

摘要： An optical fiber cable includes a first jacket, typically comprising a polyvinyl chloride material, a core member comprising at least one, typically .ltoreq.10, optical fiber(s), and a core wrap loosely surrounding the optical fiber(s). The optical fiber(s) typically is (are) slightly overstuffed. The cable further comprises three non-metallic strength members (or groups of strength members) completely embedded in the first jacket and coupled thereto. In cables containing three strength members, the coupling is typically characterized by a pull-out strength of at least 25, preferably more than 40, lbs/in of strength member. Each strength member comprises a multiplicity of impregnated filaments, preferably borosilicate glass filaments impregnated with a urethane. The preferred cable typically has a circularly symmetric cross section, with the three strength members, each of radius r.sub.s, disposed longitudinally, their axes a distance R from the axis of the first jacket, with R>1.155(r+r.sub.s) where r is the inner radius of the first jacket. In one embodiment of the invention, the voids between the optical fiber(s) and the core wrap is filled with a filling compound, e.g., a fire retardant grease composition. In another embodiment, the cable further comprises a metal member, e.g., a steel tape, that contactingly surrounds the first jacket, and a plastic, e.g., polyvinyl chloride, outer jacket that contactingly surrounds the metal member. The cable can advantageously be used in the local distribution network, including in external plant applications such as distribution or buried service cable, and indoor applications such as riser or plenum cable.

摘要翻译： 光纤电缆包括通常包括聚氯乙烯材料的第一护套，包括至少一个通常为10个光纤的芯构件和松散地围绕光纤的芯箍。 光纤通常略微过度填充。 电缆还包括完全嵌入第一夹套中并与之耦合的三个非金属强度构件（或强化构件组）。 在包含三个强度构件的电缆中，联接器通常的特征在于强度构件的拉拔强度为至少25，优选大于40磅/英寸。 每个强度构件包括多个浸渍的长丝，优选浸渍有聚氨酯的硼硅酸盐玻璃丝。 优选的电缆通常具有圆形对称的横截面，其中三个加强构件，每个半径rs纵向设置，它们的轴线距离第一护套的轴线的距离R，其中r为1.155（r + rs），其中r为 第一夹套的内半径。 在本发明的一个实施例中，光纤和芯包裹之间的空隙填充有填充化合物，例如阻燃润滑脂组合物。 在另一个实施例中，电缆还包括接触地围绕第一护套的金属构件，例如钢带，以及塑料，例如聚氯乙烯，外护套，其接触地围绕金属构件。 该电缆可以有利地用于本地分配网络，包括在外部工厂应用中，例如分配或埋地服务电缆，以及室内应用，例如提升管或增压电缆。