Patents Represented by Attorney Herbert G. Burkard

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  • Radially-recoverable sleeve of composite
    Patent number: 5645906
    Abstract: A cable splice case or other article for environmental sealing comprises a composite material having multifilament fibres therein, which fibres are blocked in order to prevent passage of fluid through the material in a direction parallel to its major surfaces.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: July 8, 1997
    Assignee: Raychem Limited
    Inventors: George Barry Park, Frank James Lowe, George Michael John Ganbuehler, Norman Hutt, Stephen Alan Webb, Hendrick Graulus
  • Tracking and erosion resistant composition
    Patent number: 5641827
    Abstract: A tracking and erosion resistant composition includes (a) 100 parts by weight of organopolysiloxane; (b) between 1 and 15 parts by weight of magnesium oxide; (c) between 15 and 45 parts by weight of zinc oxide and (d) between 5 and 40 parts by weight of iron oxide.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: June 24, 1997
    Assignee: Raychem Corporation
    Inventors: Rong Jong Chang, Linas Mazeika
  • Method and device for making a protected electrical connector
    Patent number: 5639992
    Abstract: An apparatus and method for protection of electrical contacts as well as a process for splicing electrical wires that are to be exposed to an adverse environment. The protection apparatus ensures that the electrical contacts are protected when they are otherwise located in an adverse environment. In a particular embodiment, the apparatus includes a connector, an insulating sleeve adapted to retain the connector, and an encapsulant. The encapsulant, which is disposed with protection apparatus, e.g. the insulating sleeve, has a cone penetration value of 100 to 350 (10.sup.-1 mm) and an ultimate elongation of at least 200% and preferably an elastic modulus of less than 10.sup.7 dynes/cm.sup.2.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: June 17, 1997
    Assignee: Raychem Corporation
    Inventor: Christian Arthur Marie-Louise Debbaut
  • Composite material
    Patent number: 5633075
    Abstract: A cable splice case or other article for environmental sealing comprises a composite material having multifilament fibers therein, which fibers are blocked in order to prevent passage of fluid through the material in a direction parallel to its major surfaces.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: May 27, 1997
    Assignee: Raychem Limited
    Inventors: George B. Park, Frank J. Lowe, George M. J. Ganbuehler, Norman Hutt, Stephen A. Webb, Hendrick Graulus
  • Side entry coil induction heater with flux concentrator
    Patent number: 5630958
    Abstract: An induction heater for heating a portion of a load comprises a side entry coil driven by a source of alternating current, with a flux concentrator located at the coil opening. The coil produces a magnetic field in the region occupied by the flux concentrator and the heated portion of the load. The flux concentrator extends along the opening of the coil and is fabricated of high permeability, low loss material, such as nickel-zinc ferrite, so as to enhance the uniformity of the magnetic field generated within the coil. In the preferred application, heating produces a complete fluid block in a cable section within the coil without overheating or damaging the cable.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: May 20, 1997
    Inventors: John B. Stewart, Jr., Peter M. Godfrey, Philippe F. Levy
  • Uses of uniaxially electrically conductive articles
    Patent number: 5631447
    Abstract: Polymer (preferably polyimide) sheets (10) with laser ablated through-holes plated with metal (20) are used for making electrical conections to specified microcircuits, especially unbumped microchips and Tape Automated Bonding (TAB) articles. Bonding with different melting point materials at opposite ends of the plated holes is disclosed. Preferred polyimides are those derived from polymerisation of 4,4'-biphenyldianhydride and (4,4'-diaminobiphenyl, or 4,4'-diaminobiphenylether, or phylenediamine, preferably p-phenylenediamine).
    Type: Grant
    Filed: January 3, 1995
    Date of Patent: May 20, 1997
    Assignee: Raychem Limited
    Inventors: Nicholas J. G. Smith, Michael J. Ludden, Peter Nyholm, Paul J. Gibney
  • Circuit protection arrangement
    Patent number: 5625519
    Abstract: A circuit protection arrangement comprises a series switching circuit that is intended to be connected in a line of the circuit and will switch to an open state when subjected to an overcurrent, and a shunt switching circuit that is open under normal operating conditions but will shunt the overcurrent across the load of the circuit or to ground when triggered by the series switching circuit. Preferably the series switching circuit comprises a switching transistor (4) that is controlled by a control transistor (6), and the shunt switching circuit comprises a shunt switching transistor (9) that is controlled by a shunt control transistor (11) which is itself controlled by the series switching circuit. The shunt switching circuit may be connected to ground or it may be connected to a back-up load or voltage foldback device such as a triac.
    Type: Grant
    Filed: April 8, 1993
    Date of Patent: April 29, 1997
    Assignee: Raychem Limited
    Inventor: Ian P. Atkins
  • Cable seal
    Patent number: 5625167
    Abstract: A method of forming a cable seal which includes positioning a sealing material around the cable, positioning a housing around the sealing material, and subsequently positioning at the housing a restricting element that can restrict movement of the sealing material out of an outlet of the housing. The restricting element is a snap or interference fit to the housing and extends to the outlet.
    Type: Grant
    Filed: August 19, 1994
    Date of Patent: April 29, 1997
    Assignee: N.V. Raychem S.A.
    Inventors: Lodewijk C. M. Van Noten, Tommy Petersen
  • Sealing apparatus for elongate cables having movable insert with gripping members
    Patent number: 5622642
    Abstract: An apparatus for sealing the end of an elongate cable such as an electrical heating cable which comprises a clip-shaped insert positioned within a tubular-shaped housing. Gripping members and pre-gripping members project from the interior surfaces of the arms of the insert and act to grip a cable when it is inserted into the device. A locking mechanism on the insert engages locking teeth on the housing and serves to hold the insert in position. A conformable gel component may be present. The apparatus provides high pullout force, as well as environmental sealing, for cables such as electrical heating cables or power cables.
    Type: Grant
    Filed: February 6, 1995
    Date of Patent: April 22, 1997
    Assignee: Raychem Corporation
    Inventors: Larry M. Edwards, Lawrence J. White, Timothy O. Stixrud, deceased
  • Gels containing SEPS block polymers
    Patent number: 5618882
    Abstract: Gel compositions comprising styrene-(ethylene/propylene)styrene (SEPS) block copolymer having Mw of at least 180,000 and polystyrene content of 25-45 weight percent, and at least 300 parts by weight percent, and at least 300 parts by weight of extender liquid per 100 parts by weight of the block copolymer. The extender softens the ethylene/propylene mid-blocks of the copolymer and the resulting gels have unexpectedly higher tack, temperature resistance, and extender-retaining ability than corresponding gels made with styrene(ethylene/butylene)-styrene block copolymers.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: April 8, 1997
    Assignee: Raychem Limited
    Inventors: Philip J. Hammond, John M. Hudson, Hendrik Graulus
  • Voice plus 4-wire DDS multiplexer
    Patent number: 5610922
    Abstract: A method and apparatus 200 for transferring analog voice telephone signals and digital data service signals simultaneously from a telephone company location to a customer premises over a single twisted pair telephone line 205. The present apparatus 200 includes an easily installed voice plus digital data service remote terminal 203 and voice plus digital data service central office terminal 201. The present apparatus can provide a 3-to-1 pair gain by multiplexing signals representing the analog voice telephone signals and 4-wire digital data service signals.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: March 11, 1997
    Assignee: Raychem Corporation
    Inventor: Nicholas A. Balatoni
  • Feed through coaxial cable connector
    Patent number: 5609501
    Abstract: 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.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: March 11, 1997
    Assignee: Raychem Corporation
    Inventors: Corey McMills, John Mattis, John A. Ross, Jeff Sampson
  • Closure for cables
    Patent number: 5610370
    Abstract: A closure for a cable joint having a cable inlet having a cable gripper that can provide strain relief to a cable within the inlet, the cable gripper being adjustable to grip cables of different diameters in such a way that the position of the center line of a gripped cable is substantially independent of cable diameter.
    Type: Grant
    Filed: June 21, 1995
    Date of Patent: March 11, 1997
    Assignee: Raychem GmbH
    Inventors: Dieter Fremgen, Frank Vock
  • Sealing member having concentric O-ring retainer filled with gel sealant
    Patent number: 5607167
    Abstract: A sealing member having: a sealing material having a cone penetration between 80 and 400 (10.sup.-1 mm) and an ultimate elongation of at least 100%, and an elastomeric retaining member for the sealing material. The retaining member in the form of two connected concentric O-rings.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: March 4, 1997
    Assignee: N.V. Raychem S.A.
    Inventor: Joris I. Franckx
  • Cable joint
    Patent number: 5606148
    Abstract: An electric cable joint is enclosed within a heat shrinkable sleeve. The joint region is sealed against the ingress of moisture by a material made of a non-crystalline polymer whose glass transition temperature is less than -40.degree. C. Further, the material has a viscosity at 35.degree. C. of less than 10.sup.6 Pa-sec and a viscosity at 95.degree. C. of greater than 10.sup.3 Pa-sec (both viscosities measured at a shear rate of 0.02 sec.sup.-1) and a minimum tack value of about 140 gm/cm.sup.2.
    Type: Grant
    Filed: July 11, 1995
    Date of Patent: February 25, 1997
    Assignee: Raychem GmbH
    Inventors: Thomas A. Escherich, Axel T. Esser, Bryan D. Neaves
  • Closure for high voltage cable connections having an insulating gel to form gel to gel interface with other insulating gel
    Patent number: 5606149
    Abstract: A closure is provided for connections between high voltage cables and other electrical equipment, such as another high voltage cable, a transformer, or switch gear. Insulation is provided by an insulating gel which forms interfaces with itself and/or materials of the cable or other electrical equipment. The interfaces have a high interfacial dielectric strength, which prevents failure along the interfaces.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: February 25, 1997
    Assignee: Raychem Corporation
    Inventors: Harry G. Yaworski, Graham J. Clarke, Wolfgang B. Haverkamp, Pascal LeCordier, James E. Jervis, Brian H. Clark
  • Remotely actuated switch and protection circuit
    Patent number: 5604785
    Abstract: A switching arrangement that can be connected in a communications channel comprising a pair of lines, between sets of terminal equipment, which comprises:(i) a pair of series switching circuits, each of which can be series connected in one of the lines and will open when subjected to an overcurrent in its associated line; and/or(ii) one or more shunt switching circuits connected between the lines, or between one or both the lines and earth, and will close when subjected to an overvoltage in its associated line;wherein the or each switching circuit can be remotely actuated by means of a test signal sent along the channel.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: February 18, 1997
    Assignee: Raychem Limited
    Inventors: Dennis M. Pryor, Michael Challis
  • Electrical connector
    Patent number: 5603635
    Abstract: A device for electrically connecting a coaxial cable to another electrical component comprises a sleeve for receiving an end of the coaxial cable, the sleeve having a pair of elongate conductive members that extend out of the sleeve from the interior thereof for forming a connection with the electrical component and two quantities of solder for connecting each conductive member to a conductor of the coaxial cable, wherein the sleeve is a unitary sleeve and the conductive members both extend out of the same end of the sleeve, at least one of the elongate conductive members being electrical insulated in order to prevent a short circuit between the conductive members. Also disclosed are a plurality of such devices located on a strip which joins at least one of the conductive members of each device, and a method of manufacturing the devices.
    Type: Grant
    Filed: October 31, 1994
    Date of Patent: February 18, 1997
    Assignee: Raychem S.A.
    Inventors: Jean-Christian Delamotte, Jacqueline Damene
  • Electrofit fiber optics butt splice
    Patent number: 5602954
    Abstract: This invention provides an enclosure for a butt splice of optical fiber cables which includes organizer trays for storing the excess lengths of individual optical fibers. The enclosure and trays provide for access to the individual fibers for splicing or repair.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: February 11, 1997
    Assignee: Raychem SV
    Inventors: Jean-Marie E. Nolf, Joris R. I. Franckx, Jozef G. A. Doucet
  • Electrical connector block
    Patent number: RE35476
    Abstract: A connector block for connecting drop wires to conductors of a multi-conductor cable is disclosed. The connector block includes a housing having plural apertures therethrough and individual terminal modules which are insertable into the housing. The terminal modules may be inserted into the housing in plural different orientations to permit insertion of the drop wire from different directions, Each individual terminal module establishes electrical connection between a drop wire pair and a pair of conductors of the multiconductor cable.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: March 11, 1997
    Assignee: Raychem Corporation
    Inventor: Sidney Levy