Abstract: Elastomeric hose having relatively low thermal conductivity is provided comprising an outer tubular cover vulcanized to an inner tube, the outer cover being radially expanded and having a cellular or porous network formed therein. A braided or knitted reinforcing layer may be provided between the radially expanded cellular cover and the inner tube with the former being bonded or vulcanized to the latter through the interstices of the reinforcing layer. The elastomeric hose may be formed by a process wherein a first forming composition, including a thermosetable elastomer, is extruded to form an uncured inner tube which is then simultaneously introduced into a cross-head extruder with a second, separately prepared, forming composition including a thermosetable elastomer and a blowing agent.

Abstract: Disclosed herein is a hydraulic jack comprising a cylinder and a piston rod assembly which is movable between a retracted position and an extended position relative to the cylinder. The jack also has mechanical locking means including a rotatable shaft and movable into engagement with the piston rod assembly in response to rotation of the shaft, thereby to lock the piston rod assembly in its extended position. The locking means reinforces the piston rod assembly in its extended position along substantially the entire length of the piston rod assembly.

Abstract: An adaptor for placement at the terminus of an electrical power distribution cable having diametral dimensions falling within a given range of sizes, the cable being of the oil-filled type including a conductor, a paper insulator and a lead jacket, to seal the terminus and enable installation, in the field, of an electrical connector for use in an electrical power distribution system. The adaptor includes a sleeve portion of insulating material for placement over the cable insulation, a conductor-sealing portion for receiving the conductor of the cable, a jacket-sealing portion for juxtaposition with the lead jacket to seal the juncture between the lead jacket and the adaptor, a dielectric filler for placement between the cable insulation and the sleeve portion, and an electrical stress control member for controlling electrical stress along the interface between the cable insulation and the dielectric filler.

Abstract: Disclosed herein is a pavement marker for engagement with an underlying roadway for providing a marking visible from an oncoming vehicle on the roadway surface. The pavement marker comprises a lens member of light-transmitting synthetic resin including a front face having a light receiving and refracting portion adapted to be inclined at an angle of at least 15.degree. and a rear face having reflex reflective means for reflecting light transmitted through the light receiving and refracting portion back to the source. In one embodiment, the pavement marker has an abrasion-limiting glass sheet having a thickness no greater than about 15 mils fixedly disposed on the light receiving and refracting portion and preferably under compression throughout the expected temperature range to which the pavement marker is exposed in use. In another embodiment, abrasion-limiting members are raised above the light receiving and refracting portion.

Abstract: An electrical connector and cable assembly comprising a predetermined length of cable and a pair of opposed flexible connector sections at each end thereof adapted to be separably engaged respectively with corresponding flexible connector sections on other connector cable assemblies to form an electrical cable of required size. Each opposed flexible connector section includes electric contact members connected to a live conductor or a plurality of live conductors in its associated cable with the contact members being adapted to engage complementary contact members in a connector section associated with another cable to form a connector assembly therebetween when the sections are matingly engaged thereby joining the live conductors together.

Abstract: Disclosed herein is a circuit panel connector for electrically connecting a circuit panel, such as a printed circuit board, with an insulated wire. The panel connector comprises a one-piece connector body of dielectric material having a main portion and a cover portion. The main portion includes a socket for receiving the panel, a rear wall, a floor, a pair of spaced side walls ech unitary with the rear wall and with the floor and providing the main portion with a cell. The main portion also has an opening in open communication with the cell and the socket and each side wall has a corner provided with a projection having an eave confronting the floor. The cover portion is hingedly connected to the rear wall and is movable between an open position in which the cover portion does not cover the cell and a closed position in which the cover portion covers the cell. The cover portion also has latching and strain relief resilient projection means.

Abstract: A splice assembly tool for assembling component parts of an electrical conductor while producing a splice connection between electrical cables therewith, comprises a first structural member adaptable for supporting force applying means thereon, said force applying means enabling a rotary force applied manually thereto to be converted to a longitudinal force for subsequent application against a first component part of said electrical connection, a second structural member adaptable for engaging a second component part in a manner to assist said first structural member in assembling the component parts relative to one another and transmission means for conveying said longitudinal force between said first and said second structural members, said first and said second structural members being coupled to one another by said transmission means, wherein at least one of said component parts comprises a tubular elastomeric sleeve and said force applying means provides a relatively high mechanical advantage when said r

Abstract: A reflective roadway delineator for reflecting incident light directed thereon by an oncoming vehicle back to the vehicle, the delineator being capable of being mounted upon either a roadway barrier having a planar longitudinally extending surfaces thereon or in the generally U-shaped trough of a longitudinally extending highway guard rail. The delineator comprises a base member having at least two different mounting surfaces thereon. One of the surfaces is engageable with and complementary to a planar surface of the associated barrier and the other of the surfaces is complementary to and engageable with at least one wall defining the recess of the trough in the associated guard rail. A reflex reflector is fixedly carried by the base member at predetermined angles relative to the mounting surfaces.

Abstract: A shielded electrical connector for use in connecting a high voltage cable to a high voltage bushing has a receptacle at one end of the connector for receiving the bushing, a contact for connection to the bushing and a shield construction which includes a conductive sleeve at the one end of the connector and extending circumferentially around the receptacle, the sleeve extending axially along the connector and being electrically separated from the remainder of the shield such that upon energization the electrical potential difference between the contact and the sleeve is less than the electrical potential difference between the contact and the remainder of the shield.

Abstract: An elongated sleeve or tubular member is provided concentrically fixed about the shank of a screwdriver with the sleeve having an axially flexible section between its opposed ends to facilitate axial shortening of the sleeve when the screwdriver is used to rotate a fastener the head of which is captured within the open end of the sleeve proximal to the blade of the screwdriver. Such axial shortening of the sleeve automatically seats the screwdriver blade within the slot in the head of the fastener when the frictional force between the screw's threads and those of the tapped hole into which it is being driven overcomes the interference fit between the free end of the sleeve and the screw head.

Abstract: A selector switch of the type having a thumbwheel selector journalled for rotation in a frame for selecting any one of a plurality of interconnections among external circuits to be connected to electrical contacts mounted in the frame, the selector including a first part of dielectric material and a second part with a metallic electrically conductive material carried by the first part and having a pattern configured in accordance with a predetermined code, portions of the metallic electrically conductive material and the first part lying in a common contact surface so as to be contacted by various ones of the electrical contacts in different positions of the selector to connect and disconnect the contacts in accordance with the pattern of conductive material, thereby selectively closing and opening the interconnections among the external circuits.

Abstract: A cable repair kit including the component parts thereof and a process for repairing in the field simply and quickly high-voltage electrically conductive cables whose outer jackets have been damaged but whose inner conductors have not been damaged. The kit comprises a portable container sealingly enclosing abrasive material for abrading the damaged cable portion; a cleaning compound; a filler compound for restoring or filling in the damaged region of the cable jacket; a bonding agent for bonding a patch of insulative, flexible material circumferentially about the section of the cable wherein the damaged portion is located; the insulative patch material; and a flame-resistant tape for aiding the bonding agent in joining the patch to the cable, as well as providing the patch with a smooth and continuous surface at a junction between side edges thereof and the cable surface.

Abstract: Electrical connector contact elements in which a tubular member of an aluminum material is captured within a surrounding member of a copper material, the tubular member having a bore for receiving a cable conductor to which the contact element will be crimped and the surrounding member including a further connector portion for connection to a further conductive member, the tubular member being in intimate electrical connection with the surrounding member and remaining in such intimate connection throughout a range of operating temperatures.

Abstract: There is disclosed a reflector structure that is highly visible both in daylight and at night, the structure including a body of transparent material having a front face and a rear face, the rear face including a continuous support surface having therein a plurality of recesses each defining a cell surrounded by a support wall, a plurality of retrodirective reflector elements disposed in the recesses for reflecting light falling upon the front face back toward the source thereof to render the reflector structure highly visible at night, and a backing member covering the rear face and hermetically sealed to the support surface thus hermetically to seal each of the cells to prevent entry of water, dirt and the like thereinto so as to preserve the reflecting properties of the reflector elements.

Abstract: Disclosed herein is a fluid pressure indicator for providing visual indication whether or not the magnitude of a fluid pressure condition is above a predetermined minimum value. The indicator comprises indicating means having an indicating portion and a diaphragm. The indicating means is movable between a first extreme position in which the indicating portion is not visible and a second extreme position in which the indicating portion is visible. The diaphragm has a fixed portion and a resiliently deformable portion which is affixed to the indicating means and movable responsive to changes in the magnitude of the fluid pressure condition.

Abstract: An electrical connector in the form of a double bushing insert comprises means for electrically and mechanically threadably connecting the insert to a transformer bushing well. Such means is adapted to permit free angular rotation of the insert in opposite directions through a predetermined angle after the insert has been torqued into fixed operative threadable engagement with the bushing well stud without a need to back-off the insert from the stud by loosening the threaded connection therebetween.

Abstract: A high voltage electrical connector of the type employed to connect a high voltage cable to the terminal of an electrical apparatus, such as a transformer, in a power distribution circuit is provided with a connector element which enables a ground connection to be made so as to ground the terminal without disconnecting the connector. A fault-closing device is provided in the electrical connector, in the event that the ground connection inadvertently is made when the circuit is energized. Access is provided through the connector element and the fault-closing device for a tool which can be inserted and operated from a remote location to selectively disconnect and connect the electrical connector and the terminal of the electrical apparatus, while the electrical connector and the cable attached thereto are grounded.

Abstract: A laminated microporous article consisting of at least two layers or plies, the first comprising either a thermoset or thermoplastic microporous material and the second comprising a polyester non-woven, heat bonded (in distinction of adhesive bonded) web. The resulting laminated microporous article is especially useful as a battery separator and exhibits superior propertries including improved electrical resistance, toughness and tear strength, and flexibility.

Abstract: A low-profile snowplowable pavement marker includes a metal base member having two arcuate-bottom keel members interconnected by an arcuate-bottom support member, the upper surfaces of the keel members respectively defining inclined ramps from a plane at one end of the base member toward the other end thereof to corresponding coplanar top surfaces, the support member having a support surface lying below the plane for supporting thereon a cube corner reflex reflector assembly partially recessed below the plane. The keel members and the support member are respectively secured in complementary arcuate recesses with the plane substantially coplanar with the roadway surface, the recesses being cut in the pavement with circular blade cutting apparatus without moving the cutting apparatus along the pavement. A bidirectional marker is shown as well as cutting apparatus for cutting the three recesses therefor simultaneously.

Abstract: Apparatus for connecting and disconnecting a male contact element and a high voltage cable includes a housing securable to the cable and defining an axial passage having a cavity, a piston assembly with a female contact element movable in the passage and defining a chamber, material generating arc-quenching gas, a gas-pressure responsive valve providing communication between the chamber and cavity selectively on fault closure to accelerate engagement of the contact elements and connectors for providing continuous electrical connection to the female contact element of substantially fixed resistivity.