| Patent Number |
Title Of Patent |
Date Issued |
| RE30228 |
Power cable with corrugated or smooth longitudinally folded metallic shielding tape |
March 11, 1980 |
| This electrostatic shielding tape is a metal strip of low resistance and low reactance folded longitudinally over the length of an insulated power cable having a semi-conducting insulation shield surrounding its insulation. The longitudinally folded metallic tape has its edges free to |
| D402962 |
Electrical plug body |
December 22, 1998 |
|
| D378586 |
Electrical plug body |
March 25, 1997 |
|
| 4276251 |
Power and control cables having flexible polyolefin insulation |
June 30, 1981 |
| This invention is an improved insulation for electric cables and an improved method of making the insulation. Cross linked polyethylene insulation is too stiff, particularly in high voltage cables which require a thick layer of insulation. Copolymers of polypropylene have electrical |
| 4253890 |
Flame retardant inside wiring cable with an annealed metal sheath |
March 3, 1981 |
| This specification describes an improved method for making fire-resistant communication cables that have a core which includes a multitude of individual conductors or pairs with insulation surrounding some or all of the conductors. The conductors are enclosed in a metal sheath that has a |
| 4246435 |
Filled communication cable employing a paraffinic oil-base filling compound |
January 20, 1981 |
| Petrolatum-based filling compounds are known to migrate into the insulation and jacket of telephone cables and to extract the stabilizers, and as a consequence, to affect the physical and/or electrical characteristics of those cable components. It does not seem possible to avoid these |
| 4221924 |
End seals for pre-connectorized telephone cables |
September 9, 1980 |
| This invention provides relatively simple and inexpensive end seals for protecting the ends of telephone cables that are preconnectorized at the factory or distribution center. These end seals are moisture-proof, able to retain pressure and afford mechanical protection while the prec |
| 4218577 |
Telephone service wire with ester-based filling compound |
August 19, 1980 |
| This telephone service wire has metal conductors insulated with polyethylene plastic insulation or equivalent, assembled in a core having a flame-retardant polyvinyl chloride jacket. Space between the individual insulated conductors is filled with an improved filling compound for pre |
| 4215086 |
Method of making flame retardant EPR unipass telephone drop wire |
July 29, 1980 |
| This telephone drop wire is insulated with an improved insulation made from a semi-crystalline, low molecular weight, ethylene-propylene diene terpolymer (EPDM) which is used for a unipass insulation. The insulation has improved electrical properties which permit thinner sections of |
| 4176893 |
Reliable sheath bonding connector and method of making |
December 4, 1979 |
| The subject invention relates to a new connector assembly design for making a low resistance, stable electrical connection to a plastic coated aluminum shield adhering to and underlying polyethylene jacket of telephone cables. When the connector in accordance with the invention is ap |
| 4176866 |
Standardized gland assembly for cable connections |
December 4, 1979 |
| This improved gland assembly is primarily for use with mineral insulated cables. The same gland body and lock nut is used for cables regardless of the cable diameter. The dimensions of the compression ring are the same, except for the ring bore, which matches the diameter of the cable. T |
| 4176244 |
Metallurgical bonded connector for coaxial cables |
November 27, 1979 |
| This invention is an improved connection for splicing or terminating coaxial cables. The connection of this invention maintains substantially the same ratio of outer conductor inside diameter to inner conductor outside diameter as in the rest of the cable, and thus avoids impairment |
| 4170510 |
Apparatus and method for assembling communications cable containing fiber optic conductors |
October 9, 1979 |
| This invention is an improved apparatus and method for making fiber optic communication cables by cutting accurate helical grooves in a layer of insulation surrounding the surface of a strength member, and inserting the fiberglass conductors into the grooves with fillers and spacers arou |
| 4165442 |
Telephone cable with improved shield combination |
August 21, 1979 |
| Communication cables with cores that have groups of conductor pairs, that carry messages in opposite directions, in the same cable present the problem of crosstalk between the different groups. With the increase in carrier frequency that is used for communication, the crosstalk problem |
| 4155518 |
Reel lifting apparatus |
May 22, 1979 |
| Reel lifting apparatus utilizing a truck-like vehicle having a wheeled framework with a subframe mounted on the framework. A truck bed body is mounted upon the subframe and overlies the subframe. An elongate rod-like member is provided which is pivotally mounted on the body so that it |
| 4154976 |
Flame retardant inside wiring cable made with an annealed metal sheath |
May 15, 1979 |
| This inside wiring cable has insulated conductors surrounded by one or more layers of heat-resistant tape covered by a protective metal sheath which is preferably made of longitudinally folded metal strip with the seam welded and the tube metal then reduced in diameter down into intimate |
| 4153434 |
Emergency standby air drying back-up system |
May 8, 1979 |
| In some critical use, air-drying systems, 100% back-up capability is desired. The problem has been that an idle standby unit requires considerable time to reach full capability for dry air delivery. This invention bleeds enough dry air from the operating primary unit through parts of |
| 4146302 |
Construction of cable made of optical fibres |
March 27, 1979 |
| This invention is a fibre optic communication cable in which the signals are transmitted by light. The glass fibres used for the cable are protected from breaking strain and from excessively sharp bends by supporting helically wound optic fibres on the inside of a tension element wit |
| 4145567 |
Solid dielectric cable resistant to electrochemical trees |
March 20, 1979 |
| This cable for high-voltage, alternating current power transmission cables not only reduces the access of moisture into the cable but reduces access of moisture to the inner face of the insulation to such an extent as to make the cable highly resistant to the formation of electrochemical |
| 4138193 |
Multiple fiber laminate for optical waveguides |
February 6, 1979 |
| The application of low loss optical fibers in optical communication systems requires that the glass fibers are suitably packaged into a cable. This invention provides a system of multiple optical fibers between two tapes or films, one of which holds the fibers on the film by pressure-sen |
| 4136960 |
Test apparatus for optical waveguides |
January 30, 1979 |
| This specification describes a novel apparatus and method for testing optical wave guides to determine the optical attenuation and to locate faults in the optical fiber. The light for test purposes is launched into the fiber by one or more light beams that surround the wave guides and |
| 4130450 |
Method of making extruded solid dielectric high voltage cable resistant to electrochemical trees |
December 19, 1978 |
| High-voltage power cables with extruded dielectric plastic insulation, installed underground, have their life shortened by the formation of electrochemical trees in the insulation. This invention provides a high-voltage power transmission cable constructed with sealant in interstices |
| 4118907 |
Lifting equipment having telescopic boom with automatic extension limiting |
October 10, 1978 |
| Mobile lifting equipment having a wheeled vehicle with a frame. The boom structure is mounted on the frame for rotation about a vertical axis, raising and lowering the same about a horizontal axis and for extension and retraction with respect to the vehicle. The boom structure includes a |
| 4112354 |
Mobile bridge test apparatus and method utilizing a sub-power frequency test signal for cable sy |
September 5, 1978 |
| This apparatus is for evaluation installed cable systems, including those that are already in use. The apparatus measures dissipation factor, partial discharge (corona) and insulation resistance of the cable system; all of these being necessary to determine the condition of the cables. |
| 4110001 |
Optical fiber cable construction |
August 29, 1978 |
| This optical fiber cable has the optical fibers adhered to a support. An assembly including the fibers and the support is carried by a core element having a helical channel in which the fiber assembly is located and free to adjust itself to accommodate bending of the cable without subjec |
| 4104480 |
Semiconductive filling compound for power cable with improved properties |
August 1, 1978 |
| This invention is an improved filling compound for preventing moisture penetration along the interior of high voltage electric power cables. Amorphous polypropylene, mixed with carbon where it must be semiconductive, is an extremely good filling compound because of its electrical cha |
| 4104479 |
Stop joint for laminar dielectric cable |
August 1, 1978 |
| This improved stop joint is used at connections of one length of electric cable to another, for the purpose of preventing fluid in one length of cable from contacting fluid in the next length of cable. The joint includes a stop tube that surrounds the end portion of one length of cable |
| 4101512 |
Dispersion of antioxidant in cross-linkable polyethylene |
July 18, 1978 |
| This invention is an improved method for dispersing antioxidant material in cross-linkable insulation for electric cables. The antioxidant, which has a high melting point, is dissolved in a carrier, preferably the cross-linking agent, to obtain a solution of low melting point that is |
| 4095039 |
Power cable with improved filling compound |
June 13, 1978 |
| Filling compounds for high voltage, electric power transmission cables have been deficient in one characteristic or another, such as incompletely filling voids during manufacture, forming voids when cables are in service, lack of permanent adhesion to cable components to prevent passage |
| 4093414 |
Single die co-extrusion apparatus for insulation |
June 6, 1978 |
| This invention is a single die by which thermoplastic insulating compounds can be co-extruded without any die for the first layer. It makes possible the extrusion of a high-density solid polyethylene skin layer over a cellular polyethylene primary insulation. Such a combination is diffic |
| 4085284 |
D-shield telephone cables |
April 18, 1978 |
| This internally shielded telephone cable provides more efficient shielding for meeting near-end crosstalk requirements in carrier systems having expanded channel capacity and increase in equivalent frequency from 772 kHz to 1.576 MHz or higher. The improved shielding uses tapes bent into |
| 4080131 |
Curing system for high voltage cross linked cables |
March 21, 1978 |
| This invention makes extruded, vulcanized, high voltage cables insulated with thermosetting compounds at much higher rates of production and with superior insulation of reduced thickness and with reduced cavities or voids in the insulation. As the cable comes from an extruder, it passes |
| 4077586 |
Drop wire payout apparatus |
March 7, 1978 |
| This specification discloses simplified wire payout apparatus for paying out wire directly from a box in which the wire is shipped, thus eliminating the necessity of providing mechanical payout equipment such as has been required on utility service trucks. For light-weight and low co |
| 4076132 |
Bobbin transporting and storage system |
February 28, 1978 |
| This invention is a wire and transport system for a communication cable manufacturing facility. Bobbins wound with insulated wire roll down a bobbin track from a location where the wires are drawn and covered with a layer of insulation. A number of full bobbins accumulate on the track, a |
| 4075419 |
Bridging tape over lap seam cable shield |
February 21, 1978 |
| In high voltage power cables with metal shields that have lap seams with the seam edges movable with respect to one another, a bridging tape is frequently used over the seam and a plastic cable jacket covers the metal shield and the bridging tape. This invention provides a novel bridging |
| 4071150 |
Conductor supply system for communication cable making apparatus |
January 31, 1978 |
| This invention receives paired bobbins from a pairing machine, stores the various bobbins of a given color coding in separate compartments of a rack, and selectively discharges bobbins to an elevator in accordance with the demand from a cabling machine. The elevator extends for the lengt |
| 4059017 |
Detecting apparatus with excess pressure protectors |
November 22, 1977 |
| This invention makes possible the use of a very small pressure relief valve for protecting pressure gauges, thermometers, humidity indicators and other detectors from excessive pressure in an element in which the fluid is contained and of which the indicators must measure a characteristi |
| 4054365 |
Fiber optic cable construction |
October 18, 1977 |
| This specification describes a fiber optic cable in which the delicate glass fibers are supported by carriers which protect the fibers from stresses imposed during the manufacturing process, the installation of the cable and the environmental conditions after installation. Microbending o |
| 4046444 |
Connector for use with printed wiring circuits |
September 6, 1977 |
| This cord connector for printed wiring cards is self-latching to the printed wiring card so that the conventional hold down screws are no longer necessary. The shell halves that protect the connector contacts are interlocking to facilitate the original assembly of the connector. |
| 4044902 |
Aerial lifting equipment |
August 30, 1977 |
| Aerial lifting equipment having a platform, a support structure and means rotatably mounting the support structure upon the platform for rotation about a substantially vertical axis. A boom structure is mounted on the support structure for movement about a substantially horizontal axis a |
| 4044856 |
Lifting equipment having a boom structure and a control mechanism for use therewith using a flex |
August 30, 1977 |
| Lifting equipment having a support structure and a boom structure mounted on the support structure with a workman's platform carried by the boom structure. The boom structure includes means for electrically insulating the workman's platform from the support structure. A source of light i |
| 4032381 |
Extruded solid dielectric high voltage cables with multi-layer insulation |
June 28, 1977 |
| Electrical cables that carry higher voltage require insulation of greater thickness. This invention extrudes the insulation over a cable core and extrudes it in superimposed layers which fuse to one another to prevent formation of voids within the insulation. The insulation applied in ea |
| 4031310 |
Shrinkable electrical cable core for cryogenic cable |
June 21, 1977 |
| This invention is a cable core made of two layers of helically wound strips of metal with one layer having a right hand lay and the other layer having a left hand lay. The angle of lay is such that the diameter of the core changes at a faster rate than the length of the strips change wit |
| 4029210 |
Bobbin spacer for conveyor system |
June 14, 1977 |
| This invention conveys full and empty bobbins between different locations in a manufacturing facility for making communication cables. Most of the manual handling of the bobbins is eliminated by having a closed loop conveyor on to which bobbins are loaded and from which bobbins are eject |
| 4012005 |
Rotational tape accumulator |
March 15, 1977 |
| This rotational tape accumulator wraps slack tape in spirals during times that the tape is being fed to a machine for making cable or other continuous product. When the trailing end of a tape must be stopped to splice on a new length, the accumulated tape is unwound from the accumula |
| 4003610 |
Terminal housing |
January 18, 1977 |
| A terminal housing has top and bottom walls shaped as inverted pans, which support between them a forwardly-arched arrangement of terminal block panels providing a rear cable-connection space and a front service-connection face. A peripherally-continuous side-wall enclosure includes |
| 3998372 |
Adaptor for powder actuated tool or similar item |
December 21, 1976 |
| Power-operated tools require an adaptor for holding in place a clip while the tool projects a fastener through the clip to fasten it to a ceiling or other structure. This improved adaptor is held on the barrel of the tool by a connection that permits the clip or the tool to be rotated in |
| 3985948 |
Watertight disc coaxial cables |
October 12, 1976 |
| This invention is a coaxial cable with watertight compartments between the discs that hold a center conductor coaxial with a tubular outer conductor. The object of the invention is to obtain greater mechanical strength for the cable without undue increase in attenuation. Discs are connec |
| 3968321 |
Offset "O" internal shield design for PCM telephone cables |
July 6, 1976 |
| The telephone communication cable of this specification has a metal shield formed by bending a sheet of metal at one or both edges so that the portions of the sheet that are folded over one another form a shield of double thickness and the shield has one or both of its edges formed by a |
| 3957452 |
Procedure for copper plating aluminium wire and product thereof |
May 18, 1976 |
| This method of copper plating aluminum and aluminum alloy wire or strip applies an adherent and ductile plating while the wire is moving rapidly and continuously through the plating apparatus. An improved chemical zincating step followed by a copper pyrophosphate strike plating, within |
