Patents Represented by Attorney H. Frederick Hamann
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Patent number: 5854677Abstract: An RLG OPTICAL NOISE INJECTOR places a random signal on a PZT driving one mirror controlling the optical path length (OPL) of a ring laser gyro (RLG) and the negative of the signal on a PZT driving a second mirror controlling the OPL. The OPL is therefore maintained constant while injecting random noise into the phase of the counterpropagating beams to avoid dynamic lock-in. Static lock-in may also be avoided by superposing an oscillatory signal on the random signal fed to the first PZT and the negative of the oscillatory signal on the random signal fed to the second PZT.Type: GrantFiled: August 31, 1990Date of Patent: December 29, 1998Assignee: Rockwell International CorporationInventors: Frederick Aronowitz, Ludd A. Trozpek
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Patent number: 5440162Abstract: An ESD protection circuit for the pads of an integrated circuit (IC) using silicide-clad diffusions is disclosed. The circuit uses a robust N+ diode with N-well block, an output NFET and a large transient clamp, each with a distributed, integrated N-well drain resistor to prevent the IC from avalanching and leakage during the Human Body Model and Charged Device Model tests for ESD.Type: GrantFiled: July 26, 1994Date of Patent: August 8, 1995Assignee: Rockwell International CorporationInventors: Eugene R. Worley, Addison B. Jones, Rajiv Gupta
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Patent number: 5433528Abstract: A hydrostatic bearing having two axial grooves on opposite sides of the bearing for breaking the rotational symmetry in the dynamic force coefficients thus reducing the whirl frequency ratio and increasing the damping and stiffness of the hydrostatic bearing.Type: GrantFiled: February 28, 1994Date of Patent: July 18, 1995Assignee: Rockwell International CorporationInventor: Luis A. San Andres
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Patent number: 5422924Abstract: A device and method for controlling the gain of a charge based signal is described. The described device and method may be used for both offset correction and for gain control. First and second charge holding gates are provided for receiving a charge packet representing a signal. A control gate partitions off at least a portion of the charge on the secondary charge holding gate. The charge not so partitioned off is then transferred onto the output line as the adjusted charge packet representing the adjusted signal, where the gain is now the ratio of areas of first charge holding gate to the sum of areas of both first and second charge holding gates. The offset of a signal can also be corrected by segregating the portion of charge representing the offset of an input signal onto the second charge holding gate.Type: GrantFiled: December 6, 1993Date of Patent: June 6, 1995Assignee: Rockwell International CorporationInventor: Paul E. Green
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Patent number: 5408616Abstract: An electronic library system cabinet having a ring bus architecture with a high reliability backplane wherein the electronic library system includes a plurality of slots for receiving a plurality of modules therein. The modules capability of determining whether the adjacent slot is occupied by a module and alternately directing output information from the module onto a return bus if the adjacent slot is unoccupied or onto an intermodule connection line if the adjacent slot is occupied by a module.Type: GrantFiled: March 4, 1992Date of Patent: April 18, 1995Assignee: Rockwell International Corp.Inventor: Robert L. Murr
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Patent number: 5407756Abstract: A variable pressure regenerative fuel cell system is provided having at least one wicked anode electrochemical unit cell.Type: GrantFiled: July 15, 1992Date of Patent: April 18, 1995Assignee: Rockwell International CorporationInventor: Kenneth M. Sprouse
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Patent number: 5403197Abstract: An adjustable rugged antenna coupler assembly for primary use in portable radios. Connector means in combination with a pair of gasket means, signal carrying means and encasement means combine to provide an improved adjustable antenna coupler assembly. The connector means is mated with complementary threadings in the radio casing thereby providing an antenna coupler readily adjustable such that the antenna is always pointed in a desired direction, such as skyward.Type: GrantFiled: August 30, 1993Date of Patent: April 4, 1995Assignee: Rockwell International CorporationInventors: David J. Ernst, Daniel K. Kaspari, Scott R. Murphy
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Patent number: 5400269Abstract: A sensor such as a quartz angular rate sensor is operated in a closed-loop mode including feedback of a control signal. The sensor produces a modulated carrier frequency signal. For stable operation of the feedback loop, the control signal is obtained from the modulated carrier frequency signal by complex demodulation of the modulated signal to produce an in-phase demodulated signal and a quadrature-phase demodulated signal, and the in-phase demodulated signal and the quadrature-phase demodulated signal are filtered by a complex equalizing filter to produce an equalized in-phase signal and an equalized quadrature-phase signal. The equalized in-phase signal represents information sensed by the sensor, and phase of a demodulation reference signal is adjusted to minimize appearance of the information in the equalized quadrature-phase signal. The equalized in-phase and quadrature-phase signals are complex modulated at the carrier frequency to produce the control signal.Type: GrantFiled: September 20, 1993Date of Patent: March 21, 1995Assignee: Rockwell International CorporationInventors: Stanley A. White, John C. Pinson
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Patent number: 5400331Abstract: Each message carried by a communication network has a packet that contains data, a tag, and a generation count wherein duplicate packets sent in different messages have identical generation counts. A station includes a modem that connects to the communication network in order to receive messages. A fixed screener circuit has a first memory that stores a set of tag values and a fixed screener determines when a packet tag matches a tag value in the first memory. The station also has an interface through which tag values are received from an external device, such as a host computer. A general purpose screener includes a second memory with a plurality of storage locations in which to store tag values from the interface and a generation count associated with each tag value.Type: GrantFiled: April 28, 1993Date of Patent: March 21, 1995Assignee: Allen-Bradley Company, Inc.Inventors: Mark A. Lucak, Jonathan R. Engdahl, David J. Gee, Hassan A. Chami, Donald S. Pieronek
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Patent number: 5378979Abstract: A real time three-phase analyzer stores digitized values of the signals of the three-phase circuits in memory so that they may be addressed according to circuit and sample number. Positive, negative and zero phase sequences are developed without the need for trigonometric calculation by combining samples offset in memory by a number of samples approximating 120.degree.. That number of samples may be determined for an arbitrary frequency of the three-phase system by identifying zero-crossing points of one such signal and assuming the number of samples equates to 360.degree. of phase of that circuit. The phase sequence of the three circuits necessary for the calculation of the positive, negative and zero phase sequences may be determined by comparing the relative position of positive going zero-crossings for each of the three circuits.Type: GrantFiled: November 25, 1992Date of Patent: January 3, 1995Assignee: Allen-Bradley Company, Inc.Inventor: Steven A. Lombardi
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Patent number: 5369666Abstract: The MODEM WITH DIGITAL ISOLATION removes the relatively large heavy isolation transformer from the Data Access Arrangement and substitutes two tiny pulse transformers between the Integrated Analog and Digital Signal Processor with multiplexers and demultiplexers to eliminate analog distortion and multiple leads, and to accommodate Lap Top/Palm Top computers, while enhancing data speeds. The combination with surge protection enables both uncommon and common mode protection.Type: GrantFiled: June 9, 1992Date of Patent: November 29, 1994Assignee: Rockwell International CorporationInventors: Dale E. Folwell, Raphael Rahamim
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Patent number: 5353490Abstract: A modular product assembly platform which includes a multiple number of industrial robots or other similar assembly devices which are removably mounted on a specially designed platform deck. The product assembly platform also includes a programmable controller system housed in a logic control cabinet, a vision control system housed in a vision control cabinet and a set of robot controllers which operate together to control the robots or assembly devices for performing product assembly tasks. The mechanical layout and configuration of the platform and the control equipment provide for convenience and flexibility in configuring and reconfiguring the assembly platform for different assembly procedures associated with different products.Type: GrantFiled: September 8, 1993Date of Patent: October 11, 1994Assignee: Allen-Bradley Company, Inc.Inventor: Z. Val Kukuljan
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Patent number: 5350908Abstract: A system for filtering electrical signals and cancelling large amplitude disturbance events contaminating such signals which might otherwise interfere with these signals being further processed. The system includes a disturbance filter which is operative for identifying disturbance events and passing an inverted signal corresponding solely to these events to a summing junction for use in cancelling these events as they occur. In the preferred embodiment this system is adapted for use in a bar code reader.Type: GrantFiled: June 30, 1992Date of Patent: September 27, 1994Assignee: Allen-Bradley Company, Inc.Inventor: Richard D. Bechtel
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Patent number: 5347117Abstract: An operator interface for a photoelectric control unit including a graphical display having a plurality of icons corresponding to different control functions and a numerical display for indicating parameter settings and operating margin values. The operator interface allows the user to rapidly and conveniently reconfigure the control unit for operation in a number of different modes in accordance with a number of different operational settings. Furthermore, the interface provides information on the operating margin of the photoelectric control unit which can be useful to the operator in aligning the unit and in judging conditions under which the unit is operating. Furthermore, the operator interface allows the user to select different light pulse repetition rates and corresponding operating ranges for the photoelectric control unit.Type: GrantFiled: December 30, 1992Date of Patent: September 13, 1994Assignee: Allen-Bradley Company, Inc.Inventors: Elik I. Fooks, Patrick J. Delaney, III, Philip E. Johnson
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Patent number: 5347277Abstract: A dual phase resolver to digital converter having two separate channels for generating rotor position data. The first channel generates an indication of rotor position based on a sinewave type reference signal applied to a first stator winding and the rotor signal while the second channel provides an indication of rotor position based on a cosinewave type reference signal applied to the second stator winding and the rotor signal. Logic circuitry associated with the data channels provide separate fault data indicative of when position data may be subject to error. The data from the two channels are selectively combined in the output of the converter. Data from one channel is used when the other channel is subject to fault. An average of the data is used when both channels are operating properly in order to provide greater accuracy.Type: GrantFiled: September 30, 1992Date of Patent: September 13, 1994Assignee: Allen-Bradley Company, Inc.Inventors: Thomas A. Nondahl, Robert L. Pitsch, David M. Brod
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Patent number: 5341281Abstract: A harmonic compensator comprises a transformer having low leakage reactance connected between a utility and a load and a signal generator which injects into the transformer a signal having a frequency which cancels undesirable higher order harmonics induced by the load. The low leakage reactance nature of the transformer permits injection of high frequency signals which restore the fundamental sine wave of the signal from the utility and thereby eliminates undesirable nonlinear harmonics which cause up-line disruptions. The low leakage reactance transformers may comprise a coaxial structure having a thin hollow tube as the primary coil, a coaxial structure having a single main coaxial cable distributed into several paralleled coaxial cables of smaller diameter, or a co-planar transformer structure having flat strip line conductors wrapped around a conventional core as the primary and secondary coils.Type: GrantFiled: May 14, 1993Date of Patent: August 23, 1994Assignee: Allen-Bradley Company, Inc.Inventor: Gary Skibinski
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Patent number: 5336882Abstract: An apparatus for providing an indication of the operational stability of a photoelectric control unit. The system separately measures photoelectric operating margin and background noise affecting the control unit. A stability figure is generated as a function of the operating margin and background noise in accordance with fuzzy logic techniques. An indication of the level of this stability figure is provided to the operator of the unit.Type: GrantFiled: December 30, 1992Date of Patent: August 9, 1994Assignee: Allen-Bradley Company, Inc.Inventors: Elik I. Fooks, Patrick J. Delaney, III, Philip E. Johnson
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Patent number: 5332986Abstract: A mechanism for an overload relay or the like employs a contact bar that is held in a reset position by magnetic attraction and in a tripped position by the biasing of a spring. The magnetic attraction effective in the reset condition may be overcome by a countervailing magnetic field developed by a coil driven in turn by overload sensing circuitry, or by the mechanical displacement of the contact bar away from the reset position by any small amount. Resetting is accomplished by another magnetic linkage which also may be subject to the countervailing field of the coil to prevent resetting during an overload condition.Type: GrantFiled: April 13, 1993Date of Patent: July 26, 1994Assignee: Allen-Bradley Company, Inc.Inventor: Christopher J. Wieloch
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Patent number: 5329217Abstract: An AC motor drive includes a PWM voltage inverter which is responsive to voltage commands from a synchronous current regulator to control motor armature current and rotor speed. A feedforward voltage is also applied as input to the PWM voltage inverter and it is compensated to boost the effective gain of the inverter when it is operated in the pulse dropping region. The compensation values are precalculated and stored in a table from which they are read during drive operation.Type: GrantFiled: December 30, 1992Date of Patent: July 12, 1994Assignee: Allen-Bradley Company, Inc.Inventors: Russel J. Kerkman, David Leggate
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Patent number: 5327041Abstract: This invention is for a single lamina biaxial transducer-made of an electrodeformable material. Several methods form making biaxial transducers are taught. The biaxial transducer has responsivity vectors which are directed along radial lines from the axis and change in in intensity with distance from the axis so that when an electric field is applied the transducer will biaxially deform. The biaxial lamina can be stacked with a common electrode between them. Biaxers can be used for reducing stress between layers in bodies. They are also useful in deforming bodies and for making pumps.Type: GrantFiled: March 12, 1993Date of Patent: July 5, 1994Assignee: Rockwell International CorporationInventor: Gordon W. Culp