Patents Represented by Law Firm McCubbrey, Bartels, Meyer & Ward
  • Patent number: 5239819
    Abstract: This invention provides for improved sterol nucleators of ice crystals. The improvement is the use of water stable crystalline forms of the sterols. These forms advantageously provide predictable nucleation temperatures which are stable for long periods of time, especially where the water is repeatedly frozen and thawed. In commercial ice making systems, the selection of stable forms of sterols having high nucleation temperatures provide great savings in construction and energy costs.
    Type: Grant
    Filed: March 6, 1992
    Date of Patent: August 31, 1993
    Inventor: Bruce I. Kinneberg
  • Patent number: 5239399
    Abstract: Devices for converting digital data into a light pulse train and decoding such a pulse train are disclosed. The light pulse generating device generates a train of light pulses having a pattern determined by a numerical value represented by a plurality of binary bits. The light pulse train generating device stores the bits in a register. Each cell of the register is connected to a light switching device that will interrupt a first light beam in response to a light signal if the value stored in the cell is a logical one. If the value is a logical 0, the interruption will not occur. The decoding device utilizes a plurality of light activated switches to route individual pulses in the light pulse train to different photodetectors. The light activated switching devices avoid the delays inherent in electrically activated switching devices.
    Type: Grant
    Filed: August 22, 1991
    Date of Patent: August 24, 1993
    Assignee: Radiant Technologies
    Inventors: Joseph T. Evans, Jr., Jeff A. Bullington
  • Patent number: 5232747
    Abstract: An improved method for making aluminum connections to platinum electrodes is described. The method utilizes an oxide layer to isolate the aluminum from the platinum. The oxide layer is created by ashing the surface of the platinum using an Oxygen plasma.
    Type: Grant
    Filed: July 27, 1992
    Date of Patent: August 3, 1993
    Assignee: Radiant Technologies
    Inventor: Joseph T. Evans, Jr.
  • Patent number: 5227672
    Abstract: A clock changeover device comprising a first input port for accepting a first external clock signal, a second input port for accepting a second external clock signal, and an output port for outputting a selected one of the clock signals. The clock changeover device also comprises a circuit for generating a control signal as a function of one of the external clock signals. The control signal has a first state and a second state, the control signal being at the second state when the second external clock signal is coupled to the second input port, the control signal being at the first state when the second external clock signal is not coupled to the second input port. The clock changeover device further comprises an output circuit responsive to the control signal for coupling the first input port to the output port when the control signal is in the first state and for coupling the second input port to the output port when the control signal is in the second state.
    Type: Grant
    Filed: March 31, 1992
    Date of Patent: July 13, 1993
    Assignee: Astec International, Ltd.
    Inventor: Carl K. Sawtell
  • Patent number: 5222463
    Abstract: An improvement in an internal combustion engine having a rotating annular cylinder which is rotated in a predetermined ratio to oscillation of a plurality of pairs of oscillating pistons in the cylinder, the pistons being so oscillated so that adjacent pistons are moved alternately apart from one another and toward one another for the respective strokes of the internal combustion engine and having intake port, exhaust ports and ignition means on the rotating annular cylinder located by the rotation of the cylinder between adjacent pistons according to the firing order and cycle of the engine. The improvements include the use of unitary in place of articulated, oscillating crank arms to transmit power from the torque tubes to the crankshaft and the use of pistons having gabled surfaces that are rigidly connected to the torque discs.
    Type: Grant
    Filed: July 23, 1992
    Date of Patent: June 29, 1993
    Inventor: Monti Farrell
  • Patent number: 5220704
    Abstract: This invention is a portable support apparatus comprising a mounting frame or yoke which can be supported about the hips of a worker or be attached to a machine or robot. A pivoting assembly pivots a rod having one end secured to the pivoting assembly to adjust the rod angle relative to the mounting yoke. A head assembly attachment means is secured to the rod at its other end, and is adjustable to a plurality of pitch angles relative to the rod to facilitate contact with the surface to be worked on. A head assembly is attached to the rod which may support a variety of material-removing devices including scrubbers, brushes, and scrapers, all of which can rotate circularly or eccentrically or vibrate to facilitate removal of material from surfaces. The head assembly also may include fluid projection nozzles, and vacuum apertures for connection to vacuum systems for removal of materials. The head assembly may also be adapted for use as a tool for the application of various substances on a surface.
    Type: Grant
    Filed: May 17, 1991
    Date of Patent: June 22, 1993
    Assignee: AEI
    Inventors: Thomas S. Flynn, Tadeusz M. Krzanowski, Gary W. Bayne
  • Patent number: 5220304
    Abstract: A safety insulated transformer where there are at least three layers of safety approved insulating material between any parts of the wires forming first and second windings. The first winding is wrapped torroidally with a strip of safety approved insulating material, the successive layers of that wrapping overlapping to form at least two of the required layers of safety approved insulating material, and either overlapping to form all three required layers or at least one of the wires having a coating of safety approved insulation. Preferably the ends of the wire of the first winding have end insulation comprising coiled overlapped layers of safety insulation, and a layer of additional safety insulation material of at least two superimposed thicknesses makes a minimum of one and one half turns transversely of the coil of the first winding around the coil in the region or regions where the ends leave the coil.
    Type: Grant
    Filed: May 18, 1992
    Date of Patent: June 15, 1993
    Assignee: Astec International Limited
    Inventor: Joseph K. P. Ho
  • Patent number: 5220680
    Abstract: This invention is a multiple-frequency signal generator apparatus and method primarily for simulating a cell site interference environment for electromagnetic communications systems. The generator can produce a plurality of frequencies having a frequency-spacing of d cycles per second. The invention comprises a single frequency multiplier, at least three oscillators and two mixers for providing a multitude of frequencies closely spaced about a carrier frequency. The simple design and components avoid complexity and save costs.
    Type: Grant
    Filed: January 15, 1991
    Date of Patent: June 15, 1993
    Assignee: PacTel Corporation
    Inventor: William C. Y. Lee
  • Patent number: 5219774
    Abstract: An apparatus and method for depositing a tunneling oxide layer between two conducting layers utilizing a low pressure, low temperature chemical vapor deposition (LPCVD) process is disclosed wherein tetraethylorthosilicate (TEOS) is preferably used. As applied to an electrically erasable programmable read only memory (EEPROM) device having polysilicon layers, the apparatus is constructed by forming a first layer of polysilicon, patterned as desired. A layer of silicon dioxide is then deposited by decomposition of TEOS to form the tunneling oxide to a predetermined thickness. If enhanced emission structures are desired, a layer of relatively thin tunneling oxide may be grown on the first layer of polysilicon. The oxide layer is then annealed and densified, preferably using steam and an inert gas at a specific temperature. A second layer of polysilicon is then formed on top of the tunneling oxide.
    Type: Grant
    Filed: June 26, 1990
    Date of Patent: June 15, 1993
    Assignee: Xicor, Inc.
    Inventor: Gregory S. Vasche
  • Patent number: 5216853
    Abstract: A telephone enclosure which provides wheelchair access while maintaining efficient usage of floor space is disclosed. The enclosure includes two telephone instruments. The enclosure may be constructed from mass-produced components while providing an appearance that can be customized for a particular business establishment.
    Type: Grant
    Filed: July 12, 1990
    Date of Patent: June 8, 1993
    Assignee: Pacific Bell
    Inventors: Kenneth F. Dignan, Alfred C. Scywegler
  • Patent number: 5206800
    Abstract: A circuit for utilizing the magnetizing current in the transformer of a converter to reset the transformer's core and to provide a zero-voltage-switching condition on the converter's primary switch and to regulate the output voltage is disclosed. The power converter includes a transformer having a primary winding and a secondary winding, the secondary winding being coupled to an output load and a primary switch connected in series between the primary winding and a voltage source. The closing of the primary switch causes energy to be stored in the transformer and the opening of the primary switch causes the energy to be released from the transformer. The utilization circuit includes a series combination of a storage capacitor and a first switch coupled in parallel with one of the transformer's windings to capture the energy released from the transformer. The captured energy is used to reset the transformer's core and to create a zero voltage switching condition across the primary switch.
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: April 27, 1993
    Assignee: Astec International, Ltd.
    Inventor: David A. Smith
  • Patent number: 5195595
    Abstract: A cabinet structure is described for enclosing a fire extinguisher or the like. The cabinet structure comprises a housing having a permanently hinged access panel which pivots away from the housing to permit access to its contents. The access panel is secured to the housing when in a closed position by one or more shear members of sufficient frangibility that, in response to the application of a predetermined force to a handle on the access panel, the shear members are severed, permiting the access panel to be pivoted to an open position.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: March 23, 1993
    Inventor: Henry Nakagawa
  • Patent number: 5195045
    Abstract: An automatic impedance matching apparatus for matching an RF-signal generator to a load, such as a plasma etching chamber, is disclosed. The matching apparatus comprises a matching network having two variable impedance devices, a tune detector for detecting the condition of the impedance match between the RF-signal and the load, and a controller for modifying the values of the variable impedance components in response to the measured tune condition. The present invention disclosed improve reset and convergence unit and eliminates the need for the "dead-band" provided around the matching point found in prior art impedance matching controllers. Also disclosed is an improved adjustment unit for adjusting the variable impedance components which is faster and more stable than found in prior art controllers. Also disclosed is a normalization unit for normalizing the input detection siganls such that variations in turning performance due to variations in input power level from the source are substantially reduced.
    Type: Grant
    Filed: February 27, 1991
    Date of Patent: March 16, 1993
    Assignee: ASTEC America, Inc.
    Inventors: Anthony R. A. Keane, Steven E. Hauer
  • Patent number: 5193109
    Abstract: A zoned microcell system with sector scanning for cellular telephone systems has a plurality of contiguous cells, each having a different assigned set of transmission frequency channels, arranged with handoff means for maintaining continuous communication with mobile telephones moving from cell to cell. The system includes at least one cell having a plurality of transmitting and receiving antenna sets. Each set is positioned at a respective antenna sub-site within the periphery of the cell at a suitable location, and is configured so that propagation and reception of signals is limited to a transmission zone which is substantially within the boundaries of the cell and which is substantially less in area than the cell. Control means monitor the strength of the signal received by each of the antenna sets at each frequency channel in the assigned set.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: March 9, 1993
    Assignee: PacTel Corporation
    Inventor: William Chien-Yeh Lee
  • Patent number: 5190807
    Abstract: A substantially optically transparent coated substrate product with a highly adherent, abrasion-resistant diamond-like hard carbon coating is disclosed. The substrate product is comprised of a polymeric substrate, an adhesion-mediating polysiloxane polymer layer, one or more intermediate layers and an outer layer of diamond-like hard carbon. In another embodiment of the invention a thin metallic interlayer is disposed between a first interlayer layer and subsequent interlayers and/or diamond-like hard carbon. The invention also allows for the production of adherent thin film interference layer coatings (i.e. quarter wavelength stacks and anti-reflection coatings) using diamond-like hard carbon as the high refractive index layer and the interlayer(s) as the low refractive index layer or, alternatively, using diamond-like hard carbon as the low refractive index layer and the interlayer(s) as the high refractive index layer. The invention further discloses a method for fabricating the coated substrate product.
    Type: Grant
    Filed: October 18, 1990
    Date of Patent: March 2, 1993
    Assignee: Diamonex, Incorporated
    Inventors: Fred M. Kimock, Bradley J. Knapp, Steven J. Finke
  • Patent number: 5186973
    Abstract: A method for depositing a thick, adherent and coherent polycrystalline diamond (PCD) film onto a metallic substrate using a deposition rate of no greater than 0.4 .mu.m per hour. The resulting PCD Film has a smooth surface finish, enhanced crystal orientation in comparision to industrial grade diamond powder particularly in the (220) and (400) directions, and excellent electrical and thermal properties. The method enables one to deposit PCD films having a thickness of at least 12 microns for applications on flat as well as curved substrates having wide use in the electronics industry. Thick PCD films of this invention have been found to be ideal for dissipating heat from radio frequency (RF) and microwave (MW) devices.
    Type: Grant
    Filed: September 13, 1990
    Date of Patent: February 16, 1993
    Assignee: Diamonex, Incorporated
    Inventors: Diwakar Garg, Wilman Tsai, Fred M. Kimock, Robert L. Iampietro, Paul N. Dyer
  • Patent number: 5181948
    Abstract: A micropipette puller of the type having a laser for heating a length of capillary to be pulled is shown. Before intercepting the capillary, the laser beam is first passed through an aperture to reduce the beam width to a desired size. In one embodiment the aperture is made by a pair of movable shutters allowing the beam width to be adjusted. In this embodiment the spacing between the shutters can be made small in relation to the length of capillary to be heated and the resulting slit scanned back and forth along the capillary. Fixed, removable aperture plates means are also shown.
    Type: Grant
    Filed: July 12, 1991
    Date of Patent: January 26, 1993
    Assignee: Sutter Instrument Company
    Inventor: Jack H. Belgum
  • Patent number: 5177431
    Abstract: An adjustable power converter which allows the output voltage of the power converter to be controlled linearly by a programming resistor or a programming voltage is provided. The adjustable power converter includes a linear programming circuit which generates a current as a linear function of the programming voltage or the resistance of the programming resistor. The current is connected to the feedback loop of a conventional power converter such that the output voltage of the power converter is a linear function of the current. As a result, the output voltage of the power converter can be linearly adjusted by adjusting the programming voltage or the programming resistor.
    Type: Grant
    Filed: September 25, 1991
    Date of Patent: January 5, 1993
    Assignee: Astec International Ltd.
    Inventors: David A. Smith, Carl K. Sawtell
  • Patent number: 5175525
    Abstract: The present invention provides a power transformer having a low profile and low overall volume. The power transformer also has improved isolation between the primary and the secondary windings, while at the same time providing improved electromagnetic coupling between these windings. The power transformer comprises an insulating enclosure for encapsulating a primary winding wound therein. The secondary winding comprises two electrically connected planar windings stamped from a conductive foil sheet. The insulating enclosure is positioned between the two planar windings of the secondary winding. The power transformer also comprises a core for coupling magnetic flux from the primary winding to the secondary winding.
    Type: Grant
    Filed: June 11, 1991
    Date of Patent: December 29, 1992
    Assignee: Astec International, Ltd.
    Inventor: David A. Smith
  • Patent number: 5173846
    Abstract: A circuit for utilizing the magnetizing current in the transformer of a converter to reset the transformer's core and to provide a zero-voltage-switching condition on the converter's primary switch is disclosed. The power converter includes a transformer having a primary winding and a second winding, the secondary winding being coupled to an output load and a primary switch connected in series between the primary winding and a voltage source. The closing of the primary switch causes energy to be stored in the transformer and the opening of the primary switch causes the energy to be released from the transformer. The utilization circuit includes a series combination of a storage capacitor and a first switch coupled in parallel with one of the transformer's windings to capture the energy released from the transformer. The captured energy is used to reset the transformer's core and to create a zero voltage switching condition across the primary switch.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: December 22, 1992
    Assignee: Astec International Ltd.
    Inventor: David A. Smith