Patents Represented by Attorney Herbert G. Burkard
  • Patent number: 5852397
    Abstract: A circuit protection device which comprises first and second laminar electrodes; a laminar PTC conductive polymer resistive element sandwiched between the electrodes; a third laminar conductive member which is secured to the same face of the PTC element as the second electrode but is separated therefrom; and an electrical connector which connects the third conductive member and the first electrode. This permits connection to both electrodes from the same side of the device, so that the device can be connected flat on a printed circuit board, with the first electrode on top, without any need for leads. The connector is preferably a cross-conductor which passes through an aperture in the PTC element, because this makes it possible to carry out the steps for preparing the devices on an assembly which corresponds to a number of individual devices, with division of the assembly as the final step.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: December 22, 1998
    Assignee: Raychem Corporation
    Inventors: Chi-Ming Chan, Michael Zhang, Daniel Chandler, Shou-Mean Fang, Dennis Siden, Mark Thompson
  • Patent number: 5849824
    Abstract: The invention provides for a thermoset or thermoplastic gel composition containing a polymer with anhydride groups along the polymer backbone at least at outset of the fabrication process and an extender fluid, optionally including thermally conductive fillers. The gel compositions are useful for sealing wires, vibration dampening, sporting goods, and toys.
    Type: Grant
    Filed: February 6, 1996
    Date of Patent: December 15, 1998
    Assignee: Raychem Corporation
    Inventors: Frank Mercer, Hendrik Graulus
  • Patent number: 5835004
    Abstract: Improved tape assemblies for delivering electrical devices to work stations at which the devices are installed. Each of the devices comprises a laminar electrical component sandwiched between two laminar metal members, and is preferably a PTC circuit protection device. In the assemblies, the electrical components are discrete components, but they are contacted by, and linked together through, laminar metal members which, after the assembly has been divided into separate devices, provide leads which contact and extend away from the electrical component. Preferably the metal members are prepared by cutting and forming a single strip of metal. Preferably the assembly is free from any longitudinally continuous carrier strip which much be discarded after the devices have been separated from each other. Preferably, the assemblies are sufficiently flexible to be wrapped around a reel and unwrapped at the work station.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: November 10, 1998
    Assignee: Raychem Corporation
    Inventors: James P. Gemperle, Richard A. Herms, Bengt Nyman, Irwin Zahn
  • Patent number: 5834686
    Abstract: A generally disc-shaped polymeric insulating article (14) is in two parts to fit around the core (4) of an insulator (2). A first part (22) of the article (14) is substantially C-shaped to fit around the insulator core (4), and the second part comprises an insert (30) that slidably engages the first part (22) so as to secure the article in place. The article (14) projects a substantial distance radially from the insulator (2) to prevent animals and the like, bridging the length of, and thus electrically short circuiting, the insulator (2).
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: November 10, 1998
    Assignee: Raychem Limited
    Inventors: Donald Christopher Barrett, Michael Robert Cook, Matthew Spalding
  • Patent number: 5831803
    Abstract: A circuit protection system employing arrangements of PTC devices and mechanical switches. The PTC device is not involved in the circuit until a fault is sensed. A current sensing relay senses an overcurrent and directs the current to the PTC device. As the voltage across the PTC device increases, a parallel arrangement of voltage sensing relays completes the operation of the protection system, and disconnects the load until the protection system is reset. The protection system may be reset manually or remotely.
    Type: Grant
    Filed: June 2, 1997
    Date of Patent: November 3, 1998
    Assignee: Raychem Corporation
    Inventors: Craig Wynn, St. Elmo Nickols, III
  • Patent number: 5829106
    Abstract: A toggle latch for releasably fastening and tensioning a closure band said latch comprising, a first member (20) for connection to an end of said band, a second member (22) for connection with the other end of said band, a lever (24) hingedly connected adjacent a proximal end with said second member (22) and a link member (27) hingedly interconnecting said first member (20) and said lever (24) and being joined to said lever (24) at a point spaced apart from said proximal end, said lever being movable between a first open position in which the extent of said lever (24) diverges from said band and a second closed position in which said lever (24) and link member (27) nestably overlay said first and second members (20, 22) to draw said first member (20) toward said second member (22).
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: November 3, 1998
    Assignee: N.V. Raychem S.A.
    Inventors: Francis Dams, Patrick Clits, Pieter De Coster, Marc Demesmaeker
  • Patent number: 5830385
    Abstract: A liquid crystal light composite in which discrete volumes of a liquid crystal material are dispersed in a matrix material is produced by a process in which a reactive additive formulation is added and photopolymerized. The reactive additive formulation includes mono- and multifunctional compounds in specified proportions and a photoinitiator. The reactive additive formulation reduces the operating field and may also improve other electro-optical properties.
    Type: Grant
    Filed: January 24, 1997
    Date of Patent: November 3, 1998
    Assignee: Raychem Corporation
    Inventors: Aldrich N. K. Lau, Lanchi P. Vo, Robert H. Reamey, John R. Havens, Kathleen Di Zio
  • Patent number: 5830405
    Abstract: The invention provides for a method of molding an elastomeric material which avoids longitudinal mold lines and an improved molding composition as well as molded parts for hybrid insulators and the like.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: November 3, 1998
    Assignee: Raychem Corporation
    Inventors: Linas Mazeika, Rong Jong Chang, Erling Hansen, Matt Spalding
  • Patent number: 5831510
    Abstract: Laminar electrical devices, in particular circuit protection devices, contain two laminar electrodes, with a PTC element between them, and a cross-conductor which passes through the thickness of the device and contacts one only of the two electrodes. This permits connection to both electrodes from the same side of the device. The device also includes layers of solder on the areas of the device through which connection is made, and separation and/or masking members which (a) reduce the danger of short circuits formed by solder flow during installation of the device and/or (b) provide a site for permanent marking of the device.
    Type: Grant
    Filed: September 24, 1996
    Date of Patent: November 3, 1998
    Inventors: Michael Zhang, Shou-Mean Fang
  • Patent number: 5829854
    Abstract: An image projection arrangement is provided. The arrangement includes a light source assembly for producing a first light beam. A reflective image display system is arranged in the path of the first light beam and has at least one cell for generating an image to be projected. A projection lens system is arranged in the path of a second light beam originating from the image display system for projecting the image produced by the image display system onto a projection screen. Between the light source assembly and the image display system on the one hand, and between this system and the projection lens system on the other hand, a transition from a first to a second medium is provided. This transition occurs at an interface having a normal direction. The first and second media have different refractive indices. The transition is arranged such that one of the first and second light beams is totally reflected by the transition while the other light beam is transmitted by the transition.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: November 3, 1998
    Assignee: Raychem Corporation
    Inventor: Philip J. Jones
  • Patent number: 5828005
    Abstract: A gel-filled closure for environmentally protecting a connector forming a connection between a cable and at least one electrical component (which may be another cable) is disclosed. The closure includes first and second cavitied bodies, each having two lateral sides and two end sides; a hinge joining the first and second cavitied bodies along a lateral side thereof, such that the cavitied bodies are capable of pivoting around the hinge and closing around the connector and immediately adjacent portions of the cable and the at least one electrical component. A gel substantially fills each of the first and second cavitied bodies. At least one of the cavitied bodies has a flap disposed along the lateral edge thereof distal from the hinge, for directing gel flow in the lateral direction as the first and second cavitied bodies are closed. A locking mechanism for securing the cavitied bodies in a closed position is also provided.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: October 27, 1998
    Assignee: Raychem Corporation
    Inventors: Thai Huynh-Ba, Harry Yaworski, Michael J. Bontatibus, Jr.
  • Patent number: 5824954
    Abstract: An electrical interconnection device including an electrical element and a sealing member sealed within a body. The body is constructed of a first section and a second section bonded together to form an enclosure for retaining the electrical element and sealing member. Sealed passageways extend from the sealing member to the electrical element. Substrates are inserted through the sealing member into the passageways for connection to the electrical element.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: October 20, 1998
    Assignee: Raychem Corporation
    Inventors: Barton A. Biche, Eric David Nyberg, James Elms Swett, Jr.
  • Patent number: 5816853
    Abstract: A cable connector housing (11) for surrounding and sealing a coaxial cable connection, the housing (11) comprising two elongate body portions (12) (13) that surround the cable (51) and connector (52). One end of the housing (11) has a smaller part or opening (14) for accommodating the cable and the other end of the housing has a larger opening (15) for accommodating a connector. The one end of the housing (11) is shaped preferably frusto-conically, to force sealing gel within the housing (11) towards the other end of the housing when the two body portions are assembled around the connection.
    Type: Grant
    Filed: September 16, 1996
    Date of Patent: October 6, 1998
    Assignee: N.V. Raychem S.A.
    Inventors: Valere Buekers, Etienne Laeremans, Luiz Neves Mendes, Marc Demesmaeker, Pieter De Coster
  • Patent number: 5818926
    Abstract: A switching device for a telecommunications channel. The device comprises a voltage detector, a switch, and a storage device. The voltage detector produces an output voltage if the voltage between the lines of the channel exceeds a predetermined level, for example 110 volts. The switch can increase an impedance in one of the lines (preferably causing open circuit) in response to an input voltage. The first storage device, for example a capacitor, produces the input voltage when it reaches a charge V.sub.2 ; is initially at a voltage V.sub.1, for example zero, that is less than V.sub.2 ; after charging by the output voltage from the voltage detector, is at a voltage V.sub.3 greater than V.sub.2 ; and discharges from V.sub.3 to V.sub.1 in the absence of the output voltage. The voltage detector comprising a low-pass filter such that an AC signal on the channel produces an output voltage that charges the first storage device to a charge below V.sub.2.
    Type: Grant
    Filed: August 22, 1996
    Date of Patent: October 6, 1998
    Assignee: Raychem Corporation
    Inventor: Michael Challis
  • Patent number: 5818564
    Abstract: An assembly for dissipating heat from an active matrix liquid crystal display module while avoiding developing thermally induced mechanical stresses which can adversely affect the electro-optical properties of the liquid crystal material is disclosed. The module is affixed to a circuit board containing electrical leads for connection to drive electronics, in a way such that the substrate containing the active matrix elements is suspended through a window or through-hole in the circuit board and is sunken or nested into a soft elastomeric gel which is electrically non-conductive but thermally conductive. The gel provides the requisite thermal conductivity to dissipate the heat via a heat sink with which the gel is in thermal contact.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: October 6, 1998
    Assignee: Raychem Corporation
    Inventors: David C. Gray, Dana C. Chase, Jr.
  • Patent number: 5818677
    Abstract: A surge arrester (1) includes varistor elements (2) forming a stack (3) and having opposed end surfaces (4a, 4b). The varistor stack is electrically connected via the opposed end surfaces to end terminals (7a, 7b) having circumferential ridges (32a, 32b), which, in the event of failure of the varistor elements, are designed to relocate the resulting arc and direct it in a manner which reduces or minimizes damage to the surge arrester. The ridges serve as damage-tolerant sacrificial rooting points for an arc in the event of varistor element failure by presenting a substantial metal mass for the arc to erode away.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: October 6, 1998
    Assignee: Raychem Corporation
    Inventors: Jeffrey A. Bennett, William M. Robinson, John Seymour Mattis, Chuck F. Cooper
  • Patent number: 5817983
    Abstract: An arrangement for holding elongate substrates in a desired array having a plurality of passageways divided into compartments separated by pairs of spaced apart parallel flexible arms. The arms allow only two substrates to be inserted into each compartment, providing separation of additional substrates and the cannonballing effect is thereby eliminated.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: October 6, 1998
    Assignee: Raychem Corporation
    Inventors: Richard E. Rodkey, Paul William Martens, Ronald W. Watson, David W. Solano
  • Patent number: 5818556
    Abstract: An encapsulated liquid crystal layer is patterned by placing a mask into contact with a coated substrate. The mask is held against the substrate, for example, by a vacuum, to form a seal. The assembly is submerged in a solvent to dissolve the exposed region of the encapsulated liquid crystal material.
    Type: Grant
    Filed: July 24, 1996
    Date of Patent: October 6, 1998
    Assignee: Raychem Corporation
    Inventors: John R. Havens, Binh Vu Cao, Frank Wasilewski, Philip J. Jones, Damoder Reddy, Brackin L. Andrews
  • Patent number: 5814770
    Abstract: A cable enclosure having a housing and a strain-relief device. The housing has an inlet for a cable, and the strain-relief device can be connected to the cable and the housing in a strain-relieving fashion. The strain-relief device can be connected to the housing after the strain-relief device has been secured to the cable and after the housing has been sealed around the cable.
    Type: Grant
    Filed: May 1, 1996
    Date of Patent: September 29, 1998
    Assignee: Raychem Corporation
    Inventors: Amandus Lucien Emiel Pieck, Etienne Laeremans, Marc Demesmaeker
  • Patent number: 5806176
    Abstract: An insertion tool for inserting substrates having contacts disposed at their distal ends into a connection device and a method of use. The tool of the present invention is useful with any size substrate and contact, but is particularly useful for wires or fiber optic cable having small diameters with insufficient rigidity to withstand the connection force required to insert the contact into the connection device. The tool includes a pusher arm which engages the contact and forces the contact into the connection device. As the contact is inserted, the pusher arm is also inserted into the connection device and is subsequently removed from the connection device.
    Type: Grant
    Filed: February 5, 1996
    Date of Patent: September 15, 1998
    Assignee: Raychem Corporation
    Inventor: Barton A. Biche