Autonomous fluid compressor for supplying compressed fluid to a cable laying device, the fluid compressor comprising a fluid compressing unit arranged to compress fluid and comprising an exhaust valve, an electric motor, for driving the fluid compressing unit, a rechargeable power unit, to supply electric power to the electric motor, a fluid supply port connected to the exhaust valve, characterized in that the fluid compressor including an input unit, for receiving a fluid demand signal indicating a fluid demand from the cable laying device, and a control unit, arranged to control the motor based on the fluid demand signal.

A device for detecting a flow of air from an exit end of a tube fed into an entrance end of the tube, including a bore having a first section with a first size bore size and a second section with a second bore size, an obstruction located within the bore between the first section and the second section, the obstruction configured to obstruct air flowing from the first section to the second section, and fixing means to fix the device to the tube so that the bore communicates with the exit end of the tube, wherein in use, an air pressure sensor is used to compare air pressure within the first bore section and air pressure within the second bore section, so that a pressure differential is indicative of an air flow within the bore.

A method of laying an optical fiber comprises providing a continuous optical fiber, a first segment of optical-electrical hybrid cable having a first fiber receiving tube, and a second segment of optical-electrical hybrid cable having a second fiber receiving tube. The optical fiber is laid into the first fiber receiving tube using an air-blowing device. A leading end of the optical fiber is fixed in a transfer apparatus after the leading end passes through an outlet of the first fiber receiving tube. A portion of the optical fiber which has passed through the first segment is wound in the transfer apparatus until the optical fiber is completely laid in the first segment. The leading end of the optical fiber is detached from the transfer apparatus. The portion of the optical fiber which has passed through the first segment is laid into the second fiber receiving tube using the air-blowing device.

A method for use in connection with installing a cable into a conduit having a first conduit end and a second conduit end, comprising the steps of —providing the cable with a metallic attribute, —providing within or proximate to the conduit, sensing means for sensing the metallic attribute, —introducing the cable into the first conduit end and driving it towards the second conduit end and —detecting that the sensing means has sensed the metallic attribute by sensing a change in inductance levels of the sensing means.

A connector includes a first connector body and a second connector body configured to be coupled to one another. The first connector body has a through hole and a cavity. The through hole and the cavity are configured to receive a shield of a hardline coaxial cable. A first washer is disposed in the first connector body and is configured to permit the shield to be pushed in a first direction through the through hole and into the cavity while resisting movement of the shield in a second direction opposite to the first direction. The second connector body has a through hole and a cavity. The through hole and the cavity of the second connector body are configured to receive a tubular member. A second washer is disposed in the second connector body and is configured to permit the tubular member to be pushed in the second direction through the through hole of the second connector body and into the cavity of the second connector body while resisting movement of the tubular member in the first direction. The second connector body is rotatable relative to the second washer and the tubular member until the second connector body and the first connector body are coupled together to a predetermined degree of tightness.

A gas leak proof corrugated sheath design for reducing friction in an optical fiber cable (100) includes a plurality of ribbons (102) in a plurality of ribbon bundles (104), one or more water swellable yarns (110), a first layer (106), one or more ripcords (108), one or more strength members (112) and a second layer (114). The first layer, surrounding the plurality of ribbon bundles by the second layer having a plurality of ribs (116) and a plurality of grooves (118) to reduce number of contact points between the optical fiber cable and a duct to reduce coefficient of friction between the second layer and an inner surface of the duct.

An optical fiber cable includes: a plurality of optical fibers or a plurality of optical fiber ribbons; a cable sheath inside which a plurality of the optical fibers or a plurality of the optical fiber ribbons are housed; and four or more tensile strength member units which are provided so as to be embedded inside the cable sheath, and in which two or more tensile strength members are paired with each other, in which the four or more tensile strength member units are respectively provided at locations facing each other with a center of the optical fiber cable interposed therebetween in a cross section in a radial direction of the optical fiber cable, and in which a cable outer diameter of the optical fiber cable is 6 mm or more and 16 mm or less.

The present disclosure provides an optical fibre cable (100) with high blowing performance. The optical fibre cable (100) includes a plurality of optical fibres (102), a sheath (104) and one or more strength members (106). The sheath (104) envelops the plurality of optical fibres (102). The one or more strength members (106) are embedded in the sheath (104). The one or more strength members (106) embedded in the sheath (104) provides a blowing ratio to the optical fibre cable (100) in a range of about 20 to 45. The blowing ratio is a ratio of cross-sectional area of the sheath (104) to total cross-sectional area of the embedded strength members (106). FIG. 2

This invention relates to an apparatus (1) for processing an optical fiber unit, the apparatus comprising an extruder head (2) with an inlet (6) receiving an optical fiber unit (7) including at least one optical fiber (24) and an outlet (4) outputting with a tube speed a produced tube (3), and a capstan (25) receiving and passing on the produced tube (3), the produced tube contacting an outer periphery (19) of the capstan by extending around the capstan. In order to obtain a simple and reliable solution the apparatus comprises a feeding device (13) and a connection (8) to a fluid source (9). The apparatus is configured to launch the optical fiber unit (7) to move with the tube (3) by feeding fluid from the fluid source (9) into the produced tube (3), and activating the feeding device (13) to accelerate the optical fiber unit via the inlet (6) into the tube (3) such that the optical fiber unit reaches the tube speed when the optical fiber unit has reached a predetermined point (P) on the capstan (25), at which stage the feeding device (13) is deactivated.

This invention relates to an apparatus (1) for processing an optical fiber unit, the apparatus comprising an extruder head (2) with an inlet (6) receiving an optical fiber unit (7) including at least one optical fiber (24) and an outlet (4) outputting with a tube speed a produced tube (3), and a capstan (25) receiving and passing on the produced tube (3), the produced tube contacting an outer periphery (19) of the capstan by extending around the capstan. In order to obtain a simple and reliable solution the apparatus comprises a feeding device (13) and a connection (8) to a fluid source (9). The apparatus is configured to launch the optical fiber unit (7) to move with the tube (3) by feeding fluid from the fluid source (9) into the produced tube (3), and activating the feeding device (13) to accelerate the optical fiber unit via the inlet (6) into the tube (3) such that the optical fiber unit reaches the tube speed when the optical fiber unit has reached a predetermined point (P) on the capstan (25), at which stage the feeding device (13) is deactivated.