Patents Represented by Law Firm Johnson & Gibbs
  • Patent number: 5119141
    Abstract: An electrically biased attracter roller is utilized in an electrophotographic image reproduction machine, in place of a conventional corotron device, to electrically transfer toner from the side of a rotating photoconductor drum onto a side surface of paper stock being operatively fed through the machine. The charged roller is spring-biased into forcible side-to-side engagement with the drum and is frictionally rotated by the drum. The paper stock is fed between the rotating roller and drum and, by a combination of pressure and electrical attractive force, the roller very efficiently transfers toner from the drum to the paper. To further improve the overall effectiveness of the attracter roller, a humidity compensation system is provided and is operative to automatically adjust the bias voltage of the roller, and thus the electrical toner attraction force thereof, in response to sensed humidity variations within the machine housing.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: June 2, 1992
    Assignee: Compaq Computer Corporation
    Inventor: Gopal C. Bhagat
  • Patent number: 5115907
    Abstract: A tray accumulator for storing and moving trays between a load area and an unload area including a tray conveyor extending from load to unload area, a tray operated control switch at the load end of the conveyor for turning on and operating the conveyor to move a tray along the conveyor when the tray is placed at the load end of the conveyor, control switches at the unload end of the conveyor for deactivating the conveyor when fully loaded with trays and for cycling the conveyor during the unload mode of operation responsive to sequential removal of trays from the unload end, and a fluid operated power and control system connected with the conveyor and the control switches to reciprocate the conveyor and control the conveyor during the load and unload phases.
    Type: Grant
    Filed: May 2, 1991
    Date of Patent: May 26, 1992
    Inventor: Johnny B. Pomara, Jr.
  • Patent number: 5115687
    Abstract: Disclosed is a method and apparatus for taking a constantly proportional flowing sample of gas flowing through a main line having a first flow restriction therein. According to the teachings of the present of invention, such an apparatus includes a sample line connected to the main line so as to draw a flowing sample of gas from the main line at a point upstream from the first flow restriction; a second flow restriction in the sample line, the second flow restriction being very small relative to the main and sample lines and the first flow restriction; and structure that equalizes the pressure downstream of the first and second flow restrictions.
    Type: Grant
    Filed: March 5, 1991
    Date of Patent: May 26, 1992
    Assignee: Badger Meter, Inc.
    Inventors: William H. Clingman, Jr., Lyn R. Kennedy
  • Patent number: 5114723
    Abstract: Hypotonic beverage compositions and beverage concentrates adapted for oral administration of water, physiologically essential electrolytes, nutrient minerals, carbohydrates, and other ingredients to a human body. The hypotonic beverage composition comprises an aqueous solution, either carbonated or non-carbonated, electrolytes, carbohydrates, low-caloric sweetener, and edible acid components in ranges as stated.
    Type: Grant
    Filed: July 5, 1990
    Date of Patent: May 19, 1992
    Assignee: University of Texas System Board of Regents
    Inventor: James Stray-Gundersen
  • Patent number: 5113416
    Abstract: A system for adjusting the frequency of transmissions between a base station and a mobile station. The mobile station detects the frequency of the signal received from the base station, determines whether the signal was received from the current base station and adjusts the output signal of a local crystal-controlled reference oscillator in accordance with the difference between the frequency of the output signal and the frequency of the received signal.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: May 12, 1992
    Assignee: Ericsson GE Mobile Communications Holding, Inc.
    Inventor: Karl B. Lindell
  • Patent number: 5106556
    Abstract: A downcomer tray assembly for vapor liquid contact towers. The region of the tray beneath an upper downcomer is constructed with a raised, perforated region for improving mass transfer efficiency. The raised region reduces fluid pressure to vent excess vapor from the underlying tray. The vented vapor is selectively directed into the liquid discharged from the downcomer and imparted with a horizontal flow characteristic. In this manner both entrained liquid and entrained gas can be effectively released to facilitate a stabilized vapor-liquid flow configuration.
    Type: Grant
    Filed: June 25, 1991
    Date of Patent: April 21, 1992
    Assignee: Glitsch, Inc.
    Inventors: Michael J. Binkley, John T. Thorngren, Gary W. Gage, Jorge A. Bonilla, Daniel H. Beckman
  • Patent number: 5106544
    Abstract: A vapor horn-packing bed assembly for a chemical process tower incorporating a plurality of directional flow vanes within a 360 degree annular housing. A structured packing bed is disposed centrally of the annular housing and the vapor horn is disposed in flow communication with the packing bed wherein discharged vapor will ascend therethrough. The vapor horn includes a plurality of equally spaced flow vanes positioned for intercepting and diverting the vapor flow downwardly within the tower for generating a substantially homogenous vapor region beneath the packing bed. The homogenous vapor generated by such a vapor horn will comprise a turbulent, gaseous region having sufficiently uniform kinetic energy to present a substantially even ascension front into the packing bed of the vapor horn assembly and other packing beds thereabove.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: April 21, 1992
    Assignee: Glitsch, Inc.
    Inventors: Adam Lee, Gilbert Chen, Timothy Holmes
  • Patent number: 5107441
    Abstract: A system for determining the flow performance of a valve by first measuring certain flow parameters of the valve with the stem fixed in a plurality of different positions between full open and full closed and then calculating a value of flow coefficient for each. The flow parameters of the valve are then measured with the stem dynamically moving under a plurality of different flow conditions. Mathematical relationships are derived in accordance with certain procedures for calculating the flow rate of the valve under each of the different flow conditions.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: April 21, 1992
    Assignee: Otis Engineering Corporation
    Inventor: Kenneth L. Decker
  • Patent number: 5106616
    Abstract: Acemannan has now been discovered to be a potent inducer of Interleukin 1 (Il-1) and prostaglandin E.sub.2 (PGE.sub.2) production by human peripheral blood adherent cells in culture. Il-1 has been shown to be an important macrophage product and is associated with influencing the activity and production of T lymphocytes, fibroblasts, B lymphocytes and endothelial cells. Acemannan has no demonstrated toxicity, and acts as an adjuvant and immunoenhancer. Administration of an amount of acemannan sufficient to stimulate monocytes and macrophages not only produces Il-1 and PGE.sub.2 but also stimulates phagocytosis, increases antibody production, enhances antiviral activity in the serum and, in those patients with AIDS/ARC, produces defective HIV virus.Acemannan has been shown to affect the rate of virus production in viral vaccine master seed cultures by accelerating the rate of viral replication. In addition, acemannan is a potent adjuvant to viral vaccines in chickens.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: April 21, 1992
    Assignee: Carrington Laboratories, Inc.
    Inventors: Bill H. McAnalley, Robert H. Carpenter, Harley R. McDaniel
  • Patent number: 5103264
    Abstract: A printing machine, such as a copier or a printer, is provided with an electrophotographic engine cartridge including a toner cartridge, a rotatable photoconductor drum, and a specially designed magnetic brush development module. The development module utilizes a rotating magnetic roller, disposed in a developer sump, to transport a toner carrier developer material toward a side surface portion of the rotating drum onto which the toner portion of the transported developer is electrically transferred. The development module is operated in a unique closed loop fashion by the action of a specially designed blade member which strips away the toner-depleted developer from the roller and causes it to enter a recycling well. The depleted developer is transferred from the recycling well into the developer sump wherein it is mixed with toner entering the sump from the toner cartridge, and then re-applied, in the form of reconstituted developer, to the magnetic roller for subsequent toner transfer to the rotating drum.
    Type: Grant
    Filed: April 1, 1991
    Date of Patent: April 7, 1992
    Assignee: Compaq Computer Corporation
    Inventor: Gopal C. Bhagat
  • Patent number: 5099701
    Abstract: A balance and an elastic, force reducing dynamometer. The dynamometer, is of the type having a plurality of plate springs and a laterally oscillating wire clamped between a pair of wire clamping heads which are shifted under load only in a direction parallel to the clamping heads. This result is achieved by mounting the wire clamping heads in approximately the center of the corresponding one of two plate springs with a pair of struts. In alternate embodiments of the invention, both struts which mount a clamping head may be straight, one strut may be straight and the other strut offset, or both struts may be offset. The elasticity of the struts and the ratios are variable and adjustable within wide limits.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: March 31, 1992
    Assignee: Wirth Gallo Messtechnik AG
    Inventors: Johannes Wirth, Max Knusli
  • Patent number: 5100244
    Abstract: A gas calorimeter and method of measuring the calorific value of fuel gases in which a fixed volume of gas to be measured is burned in a controlled environment. The temperature increase of the air in the environment caused by the burning is used to determine the calorific value of the gas. The gas to be measured is intermittently supplied to the controlled environment using a base plate which has portions defining a plurality of dispersion holes in a distributed manner so that a greater number of the plurality of dispersion holes are in and around the periphery of the base plate than are in and toward the center of the base plate.
    Type: Grant
    Filed: August 7, 1990
    Date of Patent: March 31, 1992
    Assignee: Precision Measurement, Inc.
    Inventor: Duane V. Kniebes
  • Patent number: 5099929
    Abstract: A rotary drill bit for cutting an earth formation is provided. The drill bit includes a bit body rotatable about its longitudinal axis. A cutting face is provided on the bit body, with a concave central region and a raised outer periphery terminating at bit shoulder. The bit shoulder is concentric with and substantially parallel to the longitudinal axis of the rotary drill bit. A plurality of bit stabilizing pads are circumferentially disposed about the bit's shoulder. A plurality of stationary cutter elements are fixedly mounted to the cutting face in a selected pattern to provide a region of high cutter density on one side of the cutting face, and a region of low cutter density on the other side of the cutting face. The drill bit cuts earth formations as the bit body is rotated about its central axis. The stationary cutter elements operate to cut into the lower side wall of the wellbore as the bit body is rotated, causing the rotary drill bit to walk to the right.
    Type: Grant
    Filed: May 4, 1990
    Date of Patent: March 31, 1992
    Assignee: Dresser Industries, Inc.
    Inventors: Carl W. Keith, William W. King, Robert I. Clayton
  • Patent number: 5097829
    Abstract: An improved temperature control fluid circulating system for automatically cooling a temperature control fluid in a thermal blanket with a thermoelectric cooling device having a cold side and a hot side when powered by electricity wherein the temperature control fluid is cooled by the cold side of the cooling device and pumped to, through, and from the blanket through first and second conduits. The system includes a device for powering the cooling device with pulse width modulated electrical signals; a device for sensing the temperature of fluid flowing within each of the conduits; a device coupled to the sensing device for calculating from the sensed temperatures an indication of the temperature of the fluid flowing within the blanket; and a device associated with the powering device for modifiying the temperature of the fluid by controlling the pulse width modulation of the power supplied to the thermoelectric cooling device.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: March 24, 1992
    Inventor: Tony Quisenberry
  • Patent number: 5095458
    Abstract: A high radix carry lookahead tree includes a plurality of tree nodes, each of the tree nodes including a carrying chain or a variation thereof, and/or a NAND gate chain or a variation thereof; and each tree node may have three or more children.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: March 10, 1992
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Thomas W. Lynch, Steven D. McIntyre
  • Patent number: 5090212
    Abstract: A cutoff switch for refrigerant recovery storage container will indicate when the storage container reaches a maximum safe level. The switch will disable the compressor to prevent further recovery of refrigerant. The switch is located in a sensor housing that couples to a magnet housing. The magnet housing mounts to the upper end of the storage container and connects with the float. A magnet will move vertically in response to movement of the float. At least one Hall Effect sensor mounts in the sensor housing. The Hall Effect sensor will sense the presence of the magnet and disable the compressor accordingly.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: February 25, 1992
    Assignee: Technical Chemical Company
    Inventors: Robert L. Keltner, Jim B. Ferguson
  • Patent number: 5091942
    Abstract: A system for the authentication of mobile stations and base stations in a cellular communications network. The system includes an algorithm which generates not only a key dependent response to a random challenge, but also a temporary conversation key or call variable which may be used to encipher traffic in the network. To protect against clones in the network, the algorithm uses a rolling key which contains historical information. A bilateral authentication procedure may be used to update the rolling key and to generate a new conversation key.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: February 25, 1992
    Assignee: Ericsson GE Mobile Communications Holding, Inc.
    Inventor: Paul Dent
  • Patent number: 5088334
    Abstract: A dynamometer comprising a pair of similar leaf springs (4 and 5), lying in approximately the same plane, and at least one additional leaf spring (24). The outer part of the additional leaf spring (24) and any other supplementary leaf springs (6, 7, 19, and 20) replacing the single leaf spring and being fastened to the frame (1) and the inner part being fstened to the middle block (8). The leaf springs (6, 7, and 24) lie in a plane approximately parallel to that of the first pair of leaf springs (4 and 5), while the supplementary leaf springs (19 and 20) lie in the same plane as the first pair of leaf springs (4 and 5). An elastic rod (9 and 10) is attached to the middle of each of the leaf springs (4 and 5), respectively, and a force-measuring device (11) is located between these rods.
    Type: Grant
    Filed: December 8, 1987
    Date of Patent: February 18, 1992
    Assignee: Wirth Gallo Messtechnik AG
    Inventor: Johannes Wirth
  • Patent number: D324078
    Type: Grant
    Filed: September 20, 1989
    Date of Patent: February 18, 1992
    Inventor: William J. Kinney
  • Patent number: D324553
    Type: Grant
    Filed: January 31, 1990
    Date of Patent: March 10, 1992
    Inventor: Mark A. Matie