Patents Examined by Max H Noori
  • Patent number: 5900556
    Abstract: Strain in concrete is sensed by a helical optical fiber embedded in the concrete and connected at one end to an external light source, and at the other end to a light detector, providing a signal output to an information processor, which provides a display of the strain in the concrete.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: May 4, 1999
    Inventors: Falih H. Ahmad, James A. Evans, Barry D. Fehl
  • Patent number: 5901227
    Abstract: A key escrow technique reliably notifies an encrypting principal about escrow authorities requiring access to a secret key used to encrypt information and, further, about how much of that key is required by the authorities. The technique comprises a mechanism for storing escrow instructions pertaining to the authorities' keys in a designated location accessible by the encrypting principal. For example, the designated location may comprise a licensing string of a hardware or software add-on module needed to activate a cryptographic system of a data processing system. The escrow instructions may be further stored in an escrow formation field of a certificate. Here, the certificate may be the encrypting principal's certificate, a recipient principal's certificate and/or any certificate authority's certificate needed for the encrypting principal to verify the recipient principal's certificate.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: May 4, 1999
    Assignee: Novell, Inc.
    Inventor: Radia J. Perlman
  • Patent number: 5900545
    Abstract: A apparatus is provided for detecting deformation in solids in deep holes having a resilient vessel pre-stressed into a rock formation. The vessel is filled with fluid and is sealed except for an outlet tube of small diameter which extends all the way to, or close to, the surface. There the outlet tube terminates in an extensible bellows isolated from the atmosphere in an enclosed sealed vessel. The whole apparatus is completely filled with fluid. Any deformation of the vessel will cause fluid to be forced through the outlet tube and so cause the bellows to extend or contract. This motion can be monitored by any position-sensitive transducer such as a linear variable differential transformer or capacitance bridge. A second tube of the same length and size as the outlet tube is filled with the same fluid. This tube terminates at the bottom in close proximity to the resilient vessel. It also has a bellows and a displacement transducer at its upper end at the surface housed in an enclosed sealed vessel.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: May 4, 1999
    Assignee: Carnegie Institution of Washington
    Inventors: Ivor Selwyn Sacks, Dale W. Evertson
  • Patent number: 5900555
    Abstract: A method and apparatus for determining turbine rotor stresses in real time enables increased operation efficiency and more accurate stress determinations. The system calculates rotor bore and surface temperatures based on the time response of the rotor. The rotor surface temperature is measured using a sensor such as a thermocouple, and the measured rotor surface temperature is used to calculate rotor bore temperature and rotor average temperature based on time constants determined as a function of rotor geometry and material. The rotor surface thermal stress and the rotor bore thermal stress can be determined based on the measured and calculated temperatures.
    Type: Grant
    Filed: June 12, 1997
    Date of Patent: May 4, 1999
    Assignee: General Electric Co.
    Inventors: Bernd Artur Karl Westphal, Thane Montgomery Drummond
  • Patent number: 5898104
    Abstract: A feed assembly for a pack seal tester includes a vertically extending housing having a top opening for receipt of packages therein and a bottom opening for discharge of packages therefrom. The housing includes a feed hopper comprised of two parallel movable opposed spaced C-shaped sidewalls. A piston plate is aligned to remove packages from the bottom opening and into a package test chamber, the package test chamber being in alignment with the bottom opening. The package test chamber includes means to align said packages at a preselected position for testing by a pack seal tester.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: April 27, 1999
    Assignee: Brown & Williamson Tobacco Corp.
    Inventors: Russell W. Rohrssen, Frank W. Simmons
  • Patent number: 5898112
    Abstract: A passivity indicating apparatus for use with structures to be joined by a threaded component including a tool for tightening the threaded component to at least one of the structures, the tool being driven by a motor; measuring device for measuring the change in torque over a time period delivered by the motor to the tool during tightening; indicator receiving output from the measuring device of the change in torque over the time period and indicating precision of fit between the structures.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: April 27, 1999
    Assignee: Nobel Biocare AB
    Inventor: Andrew Joseph Stanley Dawood
  • Patent number: 5894087
    Abstract: An arrangement of a speed sensor on a personal watercraft better shields the sensor from damage while simplifying the layout and arrangement of the sensor on the underside of the watercraft hull. The hull includes a pump chamber formed in part by a front wall. The speed sensor is attached to the wall with a portion of the sensor projecting below a housing of the sensor. A ride plate covers a lower opening of the pump chamber and fits about the sensor housing. In this location, the speed sensor does not interfere with the arrangement or operation of steering or trim mechanisms used with a jet propulsion unit housed within the pump chamber. The speed sensor also is generally protected in this location and is not visible from the rear of the watercraft to improve the watercraft's aesthetics.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: April 13, 1999
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Kenichi Ohtuka, Sumihiro Takashima
  • Patent number: 5894095
    Abstract: A new mixing drill with speed sensing with multiple preset speeds for providing a display of drill motor speed while mixing for indicating the viscosity of drywall joint compound and plaster mixtures and providing a quick and easy method of mixing drywall compound to a specific consistency. The inventive device includes an electric drill, an on off switch, a detachable drill bit with vanes, a drill chuck with a magnetic marker, a magnetic sensor attached to the drill body, a drill speed counter, a motor controller, a keypad, a micro controller and a digital LCD display for displaying drill target speed setting and alternatively displaying the actual speed to target speed ratio for indicating viscosity of a mixture.
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: April 13, 1999
    Inventor: Gary W. DeMali
  • Patent number: 5894094
    Abstract: A wheel force measuring hub assembly has a measuring value sensor assembly and comprises an exterior ring part and an interior ring part. A wheel rim is attachable on the exterior ring part. The interior ring part is attachable to a wheel axle. Both ring parts are connected with one another by way of radially extending measuring webs on which strain gauges are arranged for determining forces and torques to be measured. The strain gauges are configured to determine the three mutually perpendicular axial occurring forces Fx, Fy and Fz as well as pertaining torques Mx, My and Mz. The strain gauges are arranged, aligned and connected with one another for determining all forces and torques by way of the shearing strains occurring in the case of a load on a wheel being monitored.
    Type: Grant
    Filed: July 7, 1997
    Date of Patent: April 13, 1999
    Assignee: Bayerische-Motoren Werke Aktiengesellschaft
    Inventors: Maximilian Kuchler, Hubert Meier, Friedrich Nohl, David-Alfredo Ferrufino-Camacho
  • Patent number: 5892157
    Abstract: An apparatus for measuring the flexural stiffness of a moving laminar-shaped material web is disclosed that guides the material web over two stationary guide rollers and a deflecting roller. The deflecting roller rides on the material web and deflects the material web for a predetermined distance. A force-measuring device attached to the deflecting roller measures the force exerted by the material web. An actuator movably attached to the force-measuring device is actuated periodically to move the deflecting roller into the material web whereby the force related to the additional periodic deflection is measured by the force-measuring device and evaluated to determine the flexural stiffness of the material web. In a second embodiment of the present invention, the actuator is not used and the deflecting roller includes an eccentric cross-section which imparts on the material web a periodic deflection of the web.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: April 6, 1999
    Assignee: Honeywell Inc.
    Inventor: Hans-Richard Syre
  • Patent number: 5892155
    Abstract: A fixture for use with a wire pull tester that tests the strength of a bond between an electrical contact of a semiconductor device and a wire affixed to the electrical contact. The fixture comprises a device support, a mounting surface provided on the device support, and a port provided at the mounting surface. The device support may include a height adjustment mechanism. The mounting surface may be configured to engage a surface of the semiconductor device and includes a port with which an air pressure differential is produced to maintain engagement between the mounting surface and the semiconductor device surface.
    Type: Grant
    Filed: August 11, 1997
    Date of Patent: April 6, 1999
    Assignee: VLSI Technology, Inc.
    Inventor: Fredrick James Vanderlip
  • Patent number: 5892151
    Abstract: A differential interferometric ballastic gravity measurement apparatus and method for measuring differential gravity between separate points employs at least two separate gravity sensors having respective free-fall masses capable of independent operation, an arrangement mounting the gravity sensors independent of one another in respective self-leveling states and at separate locations, a fiber optic-guided laser light interferometer coupled to the gravity sensors and adapted to produce a light signal indicative of a single measurement of differential gravity between the separate locations where the gravity sensors are situated, and a processing control system coupled to the gravity sensor and fiber optic-based laser light interferometer for activating independent operation of the gravity sensors and interferometer and for detecting the light signal and producing an electrical signal representing the measurement of differential gravity between the separate locations.
    Type: Grant
    Filed: May 21, 1997
    Date of Patent: April 6, 1999
    Assignee: EM-g, Inc.
    Inventors: Timothy M. Niebauer, Alan T. Herring
  • Patent number: 5889198
    Abstract: A method for detecting CH.sub.4 with a Ga.sub.2 O.sub.3 sensor, and a method for measuring CH.sub.4 concentration with a Ga.sub.2 O.sub.3 sensor is provided. In order to solve the problem associated with the masking or disturbing effect alcohol has on the detection of methane with a gallium oxide detector, the present invention provides a method where the sensor conductivity ((G(t.sub.1)) is acquired at a first sensor temperature, and is compared with a first threshold value. If the conductivity ((G(t.sub.1)) exceeds this threshold value, it is determined that alcohol is present in the gas mixture to be examined. The sensor is then heated, and a second conductivity (G(t.sub.2)) is acquired. If the ratio of the second to the first conductivity exceeds a second threshold value, CH.sub.4 is likewise present in the gas mixture. The measurement of the CH.sub.4 concentration ensues by means of an acquisition of two conductivities (G(t.sub.1), G(t.sub.2)) at different temperatures. The corresponding CH.sub.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: March 30, 1999
    Assignee: Siemens Aktiengesellschaft
    Inventors: Norbert Reitmeier, Maximilian Fleischer, Hans Meixner
  • Patent number: 5889214
    Abstract: A 6-component load cell used for measuring triaxial force and moment components is disclosed. The load cell has a sensing unit and an external case. In the sensing unit, upper and lower rings individually have a plurality of connectors and arcuate thick parts. The sensing unit also has a cross beam, consisting of horizontal and vertical parts crossing at right angles with a plurality of vertical and transverse binocular openings being formed on the two parts. A radial slit is formed at each corner of the junction of the cross beam. A plurality of strain gauges are attached to the cross beam. The external case has upper and lower parts, individually having a plurality of arcuate openings corresponding to the arcuate thick parts of the sensing unit. The lower part of the case also has a plurality of cord lead openings at the side wall.
    Type: Grant
    Filed: July 15, 1997
    Date of Patent: March 30, 1999
    Assignees: Korea Research Institute of Standards and Science, Cas Co., Ltd.
    Inventors: Dae Im Kang, Gab Soon Kim, Hou Keun Song
  • Patent number: 5889210
    Abstract: A bonding defect detecting apparatus is provided for operation in conjunction with an ultrasonic wire bonder using an ultrasonic oscillator driven by a signal. The apparatus has A/D converters for digitally converting a signal waveform of the signal by real-time sampling during a bonding operation. A digital signal processing device is provided for calculating at least one signal characteristic of each of the signal waveforms for each of a plurality of the bonding operation. A data accumulating devices accumulates the at least one signal characteristic for n number of bonding operations of the plurality of the bonding operation. A calculating device calculates an average signal characteristic of the signal characteristics of the n number of bonding operations.
    Type: Grant
    Filed: August 19, 1997
    Date of Patent: March 30, 1999
    Assignee: Kyushu Electronics Systems, Inc.
    Inventor: Yoshikazu Inoue
  • Patent number: 5889218
    Abstract: In the ball bearing inspection apparatus and method, the butting portion 7c of a skew drive shaft 7 rotatable coaxially with a spindle rotary shaft 1 is butted against steel balls 3 which are respectively held between the respective grooves of the inner ring 4b and outer ring 4a of a ball bearing 4 to be inspected, the spindle rotary shaft 1 is rotated while applying a pre-load to the outer ring 4a by a pre-load ring 5, and the skew drive shaft 7 is rotated while controlling the rotation speed of the skew drive shaft 7 in such a manner that the respective steel balls 3, which are being rotated on their own axes and around the spindle rotary shaft 1 due to the rotation of the spindle rotary shaft 1, is caused to make a skew movement due to the butting portion 7c.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: March 30, 1999
    Assignee: NSK Ltd.
    Inventors: Chuichi Sato, Hiroyuki Matsuzaki
  • Patent number: 5887478
    Abstract: A flow conditioning system includes a flow randomizing section for receiving an input fluid stream and for increasing the uniformity of the streamwise velocity components of the input fluid stream while randomizing the non-streamwise velocity components, so as to provide a randomized fluid stream; a flow expansion section for receiving the randomized fluid stream and damping the non-streamwise velocity components therein, so as to provide a damped fluid stream; and a flow straightening section for receiving the damped fluid stream and for dividing the damped fluid stream into multiple, parallel output substreams so as to provide a laminar flow profile in an output fluid stream.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: March 30, 1999
    Assignee: Hewlett-Packard Comapny
    Inventors: Tak Kui Wang, James W. Baker, Stephen M. Craig
  • Patent number: 5886262
    Abstract: Apparatus and method for comparing corresponding acoustic resonances in liquids. The present invention permits the measurement of certain characteristics of liquids which affect the speed of sound therein. For example, a direct correlation between the octane rating of gasoline and the speed of sound in a gasoline sample has been experimentally observed. Therefore, changes in the speed of sound therein can be utilized as a sensitive parameter for determining changes in composition of a liquid sample. The present apparatus establishes interference patterns inside of a liquid without requiring the use of very thin, rigorously parallel ceramic discs, but rather uses readily available piezoelectric transducers attached to the outside surface of the usual container for the liquid and located on the same side thereof in the vicinity of one another. That is, various receptacle geometries may be employed, and the driving and receiving transducers may be located on the same side of the receptacle.
    Type: Grant
    Filed: March 25, 1994
    Date of Patent: March 23, 1999
    Assignee: The Regents of The University of California
    Inventor: Dipen N. Sinha
  • Patent number: 5883312
    Abstract: Drawing two virtual lines passing through the center of a rectangular thin plate, made of a ferromagnetic material such as a permalloy, in directions deflected 45 degrees to the right and left relative to the horizontal/vertical lines, right, left, upper and lower edge areas between the two virtual lines of the thin plate are cut out to form notches. Edges of the notches do not contact the virtual lines. A coil wire is wound utilizing bottom lines of the individual pairs of opposing notches across the center to form an excitation coil and an output coil. With this construction, coil winding can be easily achieved by a robot rather than manually. This thereby considerably reduces the production cost and provides improved product quality and measurement accuracy.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: March 16, 1999
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventor: Tatsuaki Hayashida
  • Patent number: 5883310
    Abstract: A micromachined hot-wire anemometer having fast response times and higher sensitivities than conventional hot-wire anemometers is provided by micromachining doped polysilicon wires carried on silicon supports cantilevered from a substrate including one or more insulating layers disposed between said substrate and supports. The micromachined polysilicon hot-wire anemometer is fabricated using surface micromachining techniques.A shear stress sensor is micromachined to define a thin diaphragm over a cavity defined in a substrate underlying the diaphragm. The cavity is evacuated, sealed, and a thermistor disposed over the diaphragm. The thermistor is thus thermally insulated from the substrate and provides a low profile shear stress sensor for measuring flow rates in boundary layers above a flow surface.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: March 16, 1999
    Assignee: The Regents of the University of California
    Inventors: Chih-Ming Ho, Yu-Chong Tai, Fukang Jiang, Chang Liu, Jin-Biao Huang