Raychem Limited

Other

Corey J McMills

John Seymour Mattis

Dennis C Siden

John A Ross

Jeff Sampson

James Craig Milroy

Dieter Fremgen

Pradeep Barma

Robert J Ritter

Julian Sean Mullaney

William D Uken

Keith Nelson Melton

Barry C Mathews

Anthony C Evans

John R Hughes

Jeffry P Mackevich

Jeffrey A Sampson

Johann D'Hondt

Hans Cordia

A surge arrester designed for use with lines of 2 kV or less has a housing (10) which, in combination with a cup-shaped gasket (25), an O-ring gasket (45) and a lid (20), seals a varistor element (30) inside against environmental contaminants such as water or pollutants.

Surge arrester

A terminator cap and system for using the terminator cap is provided for protecting a standard coaxial cable port from atmospheric conditions and from unwarranted tampering. The cap is a hollow cylinder with one enclosed end. The terminator cap is dimensioned to slip over one end of a connection jack connector, the other end of which has a plurality of attachment fingers dimensioned to fit over the connection jack. The swagging shell is used to firmly hold the terminator cap to the connection jack connector and firmly hold the flared fingers of the connection jack connector to the connection jack. A locking shroud is attached to the connection jack such that the locking shroud surrounds the connection jack, the connection jack connector, the terminator cap and the swagging shell.

Coaxial cable connection protection system for unused connection port

A feedthrough coaxial cable connector includes a tubular mandrel body dimensioned to be pressed between a foil-bonded dielectric core and other elements of an outer conductor of the prepared end of the cable. The body has cable engagement surface which defines a knife edge projection therearound for engaging an outer conductor of the cable by creating shear stresses therein without actually shearing the outer conductor. A tubular shank portion extends from the cable engagement surface portion to a radial wall portion, and a jack engagement portion is coaxial about the exposed central conductor. The jack engagement portion achieves a tight friction fit upon a jack and may be formed as an inside compression collet. A radial compression providing structure causes an inside surface region of the outer conductor to bear directly against and bend over the knife edge portion. Preferably, a slideable shell is slideably positionable generally away from a connector end facing the outer surface of the jack to enable the jack engagement portion of the connector to slide over the outer surface of the jack, and slideably positionable toward the connector end so as to radially compress the radially diverging jack engagement portion against the outer surface of the jack to secure the connector thereto. A kit of parts including an expendable installation tool enables proper assembly of the cable connector without special skills or tools.

Feed through coaxial cable connector

A surge arrester for protecting power distribution equipment from overvoltages has a varistor as the active surge-arresting element. In the event of a persistent overvoltage, an amorphous conductor electrically in series with the varistor heats up to or above a critical temperature at which its tensile strength substantially decreases. The amorphous metal conductor breaks, triggering a series of events including the closing of a switch creating a permanent short to ground, operating the network overcurrent protection to de-energize the arrester and associated protected equipment, and protecting the electrical network equipment from insulation damage and/or failure because of a sustained or permanent power frequency overvoltage condition.

Surge arrester with overvoltage sensitive grounding switch

A method and a device is provided which allows the connection of coaxial cable termini to one another with minimum long-term loss of RFI shielding. The method comprises the removal of metal oxides from the concentric conductor portions of the two cable termini, applying a sealant to the concentric conductor termini and then connecting the central conductor termini to one another and the concentric conductor termini to one another. The device comprises a collet structure dimensioned to slip over the outside of a standard connection jack. Within the collet structure is disposed a quantity of sealant and the collet structure has at least one aperture through which sealant oozes from the collet structure to the exterior of the collet structure. When the collet structure is attached to the jack, the sealant is caused to ooze onto the concentric conductor thereby sealing the concentric conductor from the ambient.

Coaxial cable connection method and device using oxide inhibiting sealant

A switching device for electrically activating and deactivating a coaxial cable junction between a coaxial cable terminus and a connection jack, where both the terminus and connection jack have external and internal conductors, is disclosed. The switching device comprises an electrically conductive housing having a first end adapted to be physically connected to the external terminus conductor, and a second end adapted to be physically connected to the external connection jack conductor. An interior member disposed within the housing, has a first end adapted to be electrically connected to the internal terminus conductor, and a second end adapted to be electrically connected to the internal connection jack conductor. A first electrically conductive path lies between the first and second end of the interior member, and a switch is disposed within this conductive path. The switch is capable of being alternated between (i) a first position wherein high frequency electrical signals are substantially transmittable between the terminus and connection jack, and (ii) a second position wherein high frequency electrical signals are substantially not transmittable between the terminus and connection jack.

Switching device with slidable switch

A device is provided for firmly attaching a plurality of coaxial cable terminus to a plurality of standard connection jacks in such a way that each connection point is effectively shielded from tampering by individuals and is effectively sealed from degrading elements in the atmosphere. The device is a locking shroud which defines a plurality of locking shroud chambers, each being adapted to attach to a respective connection jack so as to surround the connection of a cable terminus to the jack. Each locking shroud chamber is attached to one other locking shroud chamber by a flexible web disposed in a curved plane. Because of the flexible webs, the locking shroud can be easily adjusted to fit any standard coaxial cable multiple connection equipment. The use of the locking shroud of the invention makes it difficult to de-attach and/or re-attach the cable terminus to the jack without special tooling. The use of the locking shroud further makes it difficult to break off the locking shroud by twisting the shroud, such as with a pair of pliers. The device can be used to make coaxial cable connections secure from tampering and atmospheric degradation. It is simple and inexpensive to install and maintain. Furthermore, the system can be retrofitted into existing coaxial cable equipment, using standard coaxial cable connection jacks.

Coaxial cable connection protection system with multiple chambered,

A system is provided for firmly attaching a coaxial cable terminus to a standard connection jack in such a way that the connection point is effectively shielded from tampering by individuals and is effectively sealed from degrading elements in the atmosphere. The system includes a jack attachment member having a collet structure, a swagging shell which slips over the collet structure to accomplish a firm connection with the jack and a locking shroud which surrounds the swagging cylinder so as to make it difficult to de-attach and/or re-attach the cable terminus to the jack without special tooling. Such special tooling, however, is simple and inexpensive for authorized service technicians, thereby making the system at once relatively secure from tampering and atmospheric degradation and simple and inexpensive to install and maintain. Furthermore, the system can be retrofitted into existing coaxial cable equipment, using standard coaxial cable connection jacks.

Tool for connecting a coaxial cable terminus to a connection jack

A hand tool formed by a body member 10B and a torque sleeve member 12S is employed to tighten a connector nut 14N at the end of an electrical cable 14C onto a cable terminal post 14P. The body is elongated having a long axis with a socket wrench 10W at one end and a handle 10H at the other end. A cable channel 10C extends along the long axis from the wrench end to the handle end for receiving the cable during installation. The inside surface of the wrench has side walls 10SW for capturing the connector nut. The outside surface of the wrench has a slight taper toward the wrench end of the body, and the inside surface of the sleeve has a generally matching taper. The sleeve is slide mounted over the wrench and the connector nut for establishing a pre-load hoop tension in the sleeve against the wrench which establishes a pre-load compression in the wrench against the connector nut. The engagement of the matching tapered surfaces causes the pre-load hoop tension to increase as the sleeve is slid over the wrench. The tapered surface engagement produces a working load hoop tension in the sleeve as the nut is tightened against the terminal post, which produces a working load compression in the wrench against the nut. The working load hoop tension has a critical value above which the tensile expansion of the sleeve permits the side walls of the wrench to slip around the nut for limiting the torque of the nut against the terminal post.

Hand tool with torque sleeve for limiting installation torque

Coaxial cable connector installation tool

The invention describes a method of preparing a cable, a coaxial cable mandrel guide/spacer, and a plurality of coaxial cables capable of accepting flexible coaxial cable without the requirement or folding back the conductive shielding braid material to form a connection to the cable. The guide/spacer is also useful with other nonbraided type connectors to avoid the need for a multilevel stripping of the coaxial cable. Avoiding the need for braid rollback eliminates a potential leak path and creates an improved sealed connector.

Coaxial cable connector with mandrel spacer and method of preparing

Coaxial cable connection protection system

Articles including a thin laminar heating element composed of a sintered conductive polymer, and electrodes attached to the heating element so that current flows in the plane of the element. The article can be placed between and in contact with two substrates, and then heated to join the two substrates together. Preferably at least one of the substrates is polymeric and becomes melt-fused to the article.

Growing community of inventors

Los Altos, CA, United States of America

Corey J McMills