摘要:
A process and apparatus for controlling the feed of an optical fiber or a plurality of optical fibers into a tube while the tube is being formed is disclosed. The process comprises the steps of propelling one or several fibers into a tube with a sufficient force to move the fibers at a speed faster than the speed at which the tube is formed, and of regulating the excess length of fiber by restraining the feed of fiber into the tube at a predetermined ratio with respect to the speed at which the tube is being formed.
摘要:
A method and an apparatus for forming a tube from a flat tape, more particularly for forming a shielding tape around a cable core, is disclosed. The tape is moved longitudinally along a straight path and simultaneously deflected laterally from a flat to a circular configuration around a mandrel, and the center of the tape is stressed over an eccentric ring attached to the outside surface of the mandrel in substantially inverse proportion to the stretch imparted to the tape during forming of the tube.
摘要:
A process and apparatus for manufacturing a cable having a composite shield and armor sheath design is disclosed. The process comprises the steps of corrugating a laminated tape formed by bonding a plastic coated aluminum tape to a wider steel tape with one edge of the aluminum tape registering with one edge of the steel tape, forming the corrugated laminated tape around a cable core with the uncovered portion of the steel tape overlapping the registering edges of the laminated tape, and extruding an outer jacket of polyethylene over the corrugated laminated tape.
摘要:
A process for producing thin walled coatings on elongated substrates by the electrostatic application of two superimposed layers of powder material is disclosed. The process comprises the steps of applying electrostatically a first layer of fusible powder material to an elongated substrate, at least partially fusing such first layer of powder material to provide a uniform coating on the elongated substrate, holding the at least partially fused coating at an elevated temperature below the full fusion temperature of the powder material to be applied as the second layer immediately prior to the application of such second layer, applying electrostatically a second layer of fusible powder material to the first layer, and fusing the total applied coating to achieve the desired coating thickness.
摘要:
A self-supporting cable, more particularly a vertical riser, borehole, dredger and mine shaft cable is disclosed. The self-supporting cable comprises a cable core, a jacket surrounding the cable core and having one or two diametrically opposed sections of increased thickness, and at least one supporting member totally embedded in each jacket section of increased thickness and disposed parallel to the longitudinal axis of the cable. The supporting member preferably consists of wire ropes made of plural elementary strands wound around a central strand, each strand comprising plural individual wires twisted together.
摘要:
A reel holder and clamping arrangement for a strander cradle is disclosed. The reel holder and clamping arrangement comprises two pintle assemblies each incuding a bearing housing, a pintle rotatably mounted in the bearing housing and means for mounting each bearing housing in axial alignment one on each side frame member. First cam means are associated with at least one of the pintle assemblies for moving its associated pintle along the axis of the reel for clamping a reel between the pintles. A reel holder engages the flanges of the reel when the reel is received within the cradle for positioning the core of the reel in alignment with the pintles of the pintle assemblies. Second cam means are associated with at least one of the pintle assemblies for moving the reel holder out of engagement with the flanges of the reel when the reel is clamped between the pintles. Means are provided for simultaneous actuation of the first and second cam means to clamp the reel between the pintles and free the flanges of the reel from the reel holder.
摘要:
A cable assembly for detecting the ingress of water inside a cable is disclosed. The cable assembly comprises a moisture detecting tape constructed of two parallel bare conductors laminated to an insulating substrate. The tape thus constructed is applied in an open helix around the conductor core of a cable. A suitable plastic jacket is extruded over the cable core and the moisture detecting tape. A shielding tape may also be applied over the cable core and the moisture detecting tape prior to extrusion of the overall plastic jacket. The cable thus constructed with the integral moisture detecting tape is adapted for connection to a suitable sensing apparatus at one end, and should moisture enter the cable as a result of damage to same, the electrical characteristics of the detecting tape would change and such change will result in a measurable conductance between the conductors of the moisture detecting tape. The ingressing water is thus sensed prior to penetrating and compromising the cable core. Standard bridge techniques are employed to determine the distance of the fault from the ends of the cable.
摘要:
An apparatus for stranding an outer layer of wires on an inner layer cable core is disclosed. The apparatus comprises a tubular stranding machine comprising a rotating tube within which are stationary mounted on the same axis a series of cradles each supporting a spool of wire from which are paid-off the outer wires, means for guiding said outer wires along the outside wall of said tube towards a stranding die located at the front of the stranding machine, means for guiding a cable core originating from the back of the stranding machine along the outside wall of the tube, and a wire straightener stationary mounted at the front of the stranding machine ahead of the stranding die and through which is passed the cable core to eliminate the waviness of the cable core due to rotation during traveling along the outside wall of the tube.
摘要:
A reel clamp for a cradle assembly is disclosed. The reel clamp comprises two pintle assemblies mounted in axial alignment, one of such pintle assembly being axially movable with respect to the other. Each pintle assembly includes a bearing housing, a reel supporting member rotatably mounted in the bearing housing and means for securing the bearing housing to one of the side frame members of the cradle assembly. Cam means are associated with the movable pintle assembly for moving the bearing housing of such movable pintle assembly along the axis of the reel for clamping the reel between the two reel supporting members.
摘要:
A voltage stabilized solid polyolefin dielectric composition is disclosed. The dielectric composition comprises a polyolefin containing a voltage stabilizing amount of an additive selected from the class of dyes identified in the Color Index as being of the solvent type possessing either an azo or a quinoid type structure, or having a xanthene structure exhibiting fluorescence. The solvent dyes must be soluble in or melt miscible with the polyolefin. The solvent dyes must also be stable at the processing temperature and under the conditions of use.