Patents Examined by Christopher Horgan
  • Patent number: 5525758
    Abstract: A bus bar of a branch joint box, which is formed by punching a metal sheet into a preset pattern of a circuit and is formed, at a predetermined location of the circuit, with a tab to be plated with metal having excellent electrical conductivity such that a connector of a wiring harness is connected to the tab through plug-in, including a separate bus bar portion which is formed by punching a separate metal sheet and includes the tab; wherein after the tab of the separate bus bar portion has been plated with the metal, the separate bus bar portion is inserted into a predetermined portion of the bus bar so as to be mounted on the bus bar.
    Type: Grant
    Filed: May 17, 1993
    Date of Patent: June 11, 1996
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventor: Kazunori Kurata
  • Patent number: 5522132
    Abstract: An improved surface mount package and method of making such a package is provided. A conventional surface mount package is modified by fabricating a U-shaped via around the lead via to form a quasi-coaxial transmission line through the insulating substrate. This permits the electrical impedance in the conductive elements of the surface mount package to be controlled to reduce insertion loss and return loss, and to improve isolation. The surface mount package includes a lead frame, and a gold plate to which an integrated circuit in the package is attached. The package is sealed with a ring-frame and a lid. Ground vias connecting the lead-frame to the plate through the substrate may also be included. The present package is designed by modelling the various elements of the package as a coaxial transmission line, a co-planar waveguide, and a single lead in a trough transmission line in combination.
    Type: Grant
    Filed: November 29, 1994
    Date of Patent: June 4, 1996
    Assignee: St Microwave Corp., Arizona Operations
    Inventor: Carmelo J. Mattei
  • Patent number: 5521332
    Abstract: A package for a semiconductor device comprising (i) a high dielectric layer composed of an alumina particles, a high permittivity-imparting agent in particles selected from (a) W or Mo, (b) Re and (c) zirconia and a glass plase comprising alumina and at least one component selected from silica, alkaline earth metal components, and rare earth device components present in their grain boundaries, (ii) a pair of electrode layers comprising as a main component a metal selected from W and Mo provided on both sides of the high dielectric layer, and (iii) insulation layers composed of alumina particles and a glass phase composed of alumina and at least one component selected from silica, alkaline earth metal components and rare earth device components, the insulation layers being provided so as to sandwich the electrode layers and the dielectric layer.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 28, 1996
    Assignee: Kyocera Corporation
    Inventors: Kunihide Shikata, Takeshi Kubota, Akira Furusawa
  • Patent number: 5519168
    Abstract: A corrosion resistant electromagnetic interference shielding material for electronic enclosures is provided. The corrosion resistant composite material comprises a metallized, highly conductive porous polymeric material, laminated between two layers of corrosion resistant composite materials, incorporating ground lugs. The highly conductive material intercepts an electromagnetic interference signal and grounds the signal through the ground lugs provided in the outer composite shell. This invention is particularly useful where a lightweight, corrosion resistant electronic enclosure is required.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: May 21, 1996
    Inventor: William M. Owens
  • Patent number: 5519479
    Abstract: Image fixing device for use in electrophotographic apparatus, capable of suppressing gloss of fixed toner image, thus stably producing images of high quality and high level of fixing intensity over a long period of time. The fixing device has a fixing roller and a pressing roller which are contacted with each other and rotate to form therebetween a nip through which a paper supporting unfixed toner image is passed to have the toner image fixed to the paper. The fixing roller has a cylindrical core having fine irregularities formed on its surface and a surface layer made of a resin. The surface of the cylindrical core has a greater elastic modulus than that of the surface layer.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: May 21, 1996
    Assignees: Hitachi, Ltd., Hitachi Koki Co., Ltd.
    Inventors: Ryuuichi Shimizu, Tsuneaki Kawanishi, Toshiya Satoh, Teruaki Mitsuya, Takashi Suzuki
  • Patent number: 5514833
    Abstract: Normally a cathode ray monitor cannot be employed in a chamber which is shielded against high-frequency interference because of the disturbances in the otherwise shielded chamber produced by the operation of the cathode ray monitor. A display arrangement employing a cathode ray monitor is disclosed, which can be used in a shielded chamber, including a projection picture tube disposed outside of the shielded chamber, a projection disposed inside of the shielded chamber, and an optical imaging arrangement disposed in the beam path between the projection picture tube and the projection screen, the beam path extending through a light-transmissive port in a wall of the shielded chamber.
    Type: Grant
    Filed: May 6, 1994
    Date of Patent: May 7, 1996
    Assignee: Siemens Aktiengesellschaft
    Inventor: Rainer Kuth
  • Patent number: 5512710
    Abstract: A package is disclosed that incorporates recessed test vias into a circuit substrate. The test vias are preferably formed at the time of substrate manufacture with little additional cost and offer access to electrical test points after hermetic sealing of the package without competing for lead sites on an otherwise crowded package exterior. The vias are preferably recessed below the surface of the substrate and may be backfilled with insulation to prevent unintended contact. Alternatively, the vias may be incorporated into the side of a package used for mounting to a motherboard, in which case the vias will be sealed at the time of package mounting. In still another instances, the vias may be left accessible or filled with a material that is easily removed for later test and service.
    Type: Grant
    Filed: August 21, 1992
    Date of Patent: April 30, 1996
    Assignee: CTS Corporation
    Inventor: Donald R. Schroeder
  • Patent number: 5512709
    Abstract: A gasket is disclosed for shielding from electromagnetic emissions and interference (EMI) that exhibits excellent characteristics of recovery, bending, and tangential compression over a wide range of frequencies. The gasket includes a knitted core of monofilament synthetic polymer yarns, and a circular warp knitted sheath over the monofilament knitted core, with the sheath being sufficiently conductive to provide shielding from electromagnetic interference over a wide range of frequencies.
    Type: Grant
    Filed: August 23, 1994
    Date of Patent: April 30, 1996
    Inventors: Andrew D. Jencks, John DiGioia
  • Patent number: 5510574
    Abstract: An electric shielding metal shell having two symmetrical rectangular-shaped metal casings connected together to hold a receptacle and an electric wire covered within a braided earthed robe, so that the braided earthed robe with the electric wire extends out of said metal casings through a wire hole in the metal casings. The metal casings each have a respective unitary, open loop-like binding strip extending around the wire hole in either direction that are connected to each other to hold the braided earthed tube and the electric wire. The tail of either binding strip is inserted into a locating hole on the opposite binding strip and the hook of either binding strip is received in one of a series of retaining holes on the opposite binding strip.
    Type: Grant
    Filed: January 6, 1994
    Date of Patent: April 23, 1996
    Assignee: Hsing Chau Industrial Co., Ltd.
    Inventor: Peter Wu
  • Patent number: 5510575
    Abstract: A window wall for shielded enclosures is provided for use in a large opening in a shielded enclosure that preserves the shielding integrity of the shielded enclosure and that is easy to install. The window wall includes a frame having a frame perimeter received within a shielded enclosure window opening in electrical conductive engagement with the shielded enclosure. The frame includes a selected number of horizontal muntins and vertical mullions defining a plurality of clear window openings. A window unit frame is received in each clear window opening supported by and electrically connected to the frame. A pair of spaced apart radio frequency shielding continuous screens span each window opening and are supported by the window unit frame. Each screen is formed of electrically conductive mesh material and is mechanically and electrically connected with the window unit frame, thereby providing continuous electrical contact with the shielded enclosure.
    Type: Grant
    Filed: November 26, 1993
    Date of Patent: April 23, 1996
    Assignee: The Curran Company
    Inventor: Joseph C. Weibler
  • Patent number: 5510578
    Abstract: A cable assembly for connection between an audio amplifier and a loudspeaker in which a plurality of insulated electrical signal-conducting wires, or conductors are bundled together. The conductors are formed into two groups, one of which is connected between the positive terminals of the amplifier and the loudspeaker and the other of which is connected between the negative terminals of the amplifier and loudspeaker. The number of conductors and the diameter of each conductor is chosen and the design is such that the characteristic impedance of the cable assembly is within the range of the impedance of the loudspeaker. As a result a significant reduction in ringing and/or blurring of complex musical transient signals caused by reflections attributable to the mismatch between the characteristic impedance of the cable and the input impedance of the loudspeaker is achieved.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: April 23, 1996
    Inventor: John H. Dunlavy
  • Patent number: 5510878
    Abstract: The present invention is characterized by an image bearing member, a toner carrying member for directing toner to the image bearing member and a magnet disposed within the toner carrying member, and in that the image bearing member and the magnet are positioned by a common positioning member. With above construction, it is possible to provide a process cartridge and an image forming system, which can remarkably the accuracy of attachment positions of an image bearing member and a magnet, thus remarkably enhancing the image quality.
    Type: Grant
    Filed: April 4, 1995
    Date of Patent: April 23, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinya Noda, Kazumi Sekine, Tadayuki Tsuda, Isao Ikemoto, Kazushi Watanabe, Yoshikazu Sasago, Kazunori Kobayashi, Shinichi Sasaki
  • Patent number: 5510577
    Abstract: The invention disclosed herein is for an improved electrical connector assembly used on couplers and program modules in marine streamers used in offshore seismic exploration. In particular, the invention disclosed herein is comprised of a deformable seal ring with a plurality of holes formed therein through which pass individual conductor wires through which are transmitted signals from various hydrophones disposed along the marine streamer. Deformable nipples are disposed on each side of the seal disk 16 around each of the openings extending through the seal disk. The seal disk and nipples are deformed around the conductor wires passing through the openings in the seal disk through use of a compression disk and spring which provides dynamic spring loading of the seal disk-conductor wire interface, thereby maintaining the integrity of the seal established between those components.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: April 23, 1996
    Assignee: I/O Exploration Products (U.S.A.), Inc.
    Inventor: Michael A. Corrigan
  • Patent number: 5508138
    Abstract: Image fixing device for use in electrophotographic apparatus, capable of suppressing gloss of fixed toner image, thus stably producing images of high quality and high level of fixing intensity over a long period of time. The fixing device has a fixing roller and a pressing roller which are contacted with each other and rotate to form therebetween a nip through which a paper supporting unfixed toner image is passed to have the toner image fixed to the paper. The fixing roller has a cylindrical core having fine irregularities formed on its surface and a surface layer made of a resin. The surface of the cylindrical core has a greater elastic modulus than that of the surface layer.
    Type: Grant
    Filed: September 28, 1994
    Date of Patent: April 16, 1996
    Assignees: Hitachi, Ltd., Hitachi Koki Co., Ltd.
    Inventors: Ryuuichi Shimizu, Tsuneaki Kawanishi, Toshiya Satoh, Teruaki Mitsuya, Takashi Suzuki
  • Patent number: 5506373
    Abstract: In a preferred embodiment, an enclosure for an electronic module containing an electronic component having upper and lower surfaces, the enclosure including: a top cover shield overlying, and substantially covering, in closely spaced relationship, the upper surface of the electronic component; a bottom cover shield underlying, and substantially covering, in closely spaced relationship, the lower surface of the electronic component; and the top and bottom cover shields being cojoined so as to substantially enclose the electronic component.
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: April 9, 1996
    Assignee: Magnavox Electronic Systems Company
    Inventor: Arden L. Hoffman
  • Patent number: 5504272
    Abstract: An image forming method in which a toner-carrying member for carrying a specific magnetic toner is placed adjacent a latent image-bearing member for carrying an electrostatic latent image so as to form a developing region of a predetermined gap size. The magnetic toner on the toner-carrying member forms a toner layer of a regulated thickness smaller than the above-mentioned gap. An asymmetric bias is applied to the magnetic toner so as to cause the magnetic toner from the toner-carrying member to be conveyed to the latent image-bearing member thereby to develop the electrostatic latent image.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: April 2, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Uchiyama, Hirohide Tanikawa, Yasutaka Akashi, Masaaki Taya, Makoto Unno
  • Patent number: 5502287
    Abstract: This invention relates to multi-component assemblies comprising a plurality of substantially parallel insulated conductors and or cables at least one of which is wrapped in a flexible affixment means thereby enabling the wrapped component to be secured to a support substrate.
    Type: Grant
    Filed: March 10, 1993
    Date of Patent: March 26, 1996
    Assignee: Raychem Corporation
    Inventor: Phu D. Nguyen
  • Patent number: 5496967
    Abstract: A package for holding at least one integrated circuit (IC) chip includes an IC chip, a lead frame, and a ceramic relay substrate with a wiring pattern. Respective portions of the wiring pattern are connected to the IC chip and the lead frame by respective bonding wires. The substrate includes at least one green tape with at least part of the wiring pattern thereon, and formed by printing a metal paste on the green tape and then firing it. An opening may be provided in the green tape to receive the IC chip. The assembly, which includes the IC chip, the substrate, and part of the leads of the lead frame, is sealed in a resin molding using a molding technique.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: March 5, 1996
    Assignee: Kabushiki Kaisha Sumitomo Kinzoku Ceramics
    Inventors: Shizuki Hashimoto, Nobuhiro Nishijima
  • Patent number: 5484959
    Abstract: The present invention provides a method and apparatus for fabricating thermally and electrically improved electronic integrated circuits by laminating one or more lead frames to a standard integrated circuit package such as, for example, thin small outline package (TSOP). The lead frame laminated to the package enhances thermal conduction of heat from the integrated circuit package. A heat spreader may also be utilized to improve heat transfer and can be further used as a ground plane to improve signal quality by reducing electrical circuit noise. Achieving improved thermal transfer characteristics from an integrated circuit package results in better dissipation of heat from the integrated circuit package and results in more reliable operation thereby. Using standard commercially available integrated circuit packages such as TSOP allows economical and rapid fabrication of thermally and electrically superior electronic circuits for applications that demand high reliability and performance.
    Type: Grant
    Filed: December 11, 1992
    Date of Patent: January 16, 1996
    Assignee: Staktek Corporation
    Inventor: Carmen D. Burns
  • Patent number: 5483023
    Abstract: A high voltage bushing includes an insulator sleeve adapted to be fitted over a conductor; an annular metal mounting flange telescoped over the sleeve, the mounting flange having a substantially smooth, axially extending cylindrical portion and a radial portion located at one end of the axial portion; an annular, axially extending epoxy layer between the mounting flange cylindrical portion and the insulator sleeve, the epoxy layer having a thickness of at least about 0.50 inch; and an annular ferrule sealing the juncture of the porcelain sleeve and the mounting flange on a side of the radial portion remote from the axial portion. The annular ferrule has a radial section engaging the radial portion of the mounting flange, and an axial section soldered to the porcelain sleeve.
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: January 9, 1996
    Assignee: General Electric Co.
    Inventor: Gary R. Barnes