Patents Examined by R. Ratliff
  • Patent number: 6049384
    Abstract: An apparatus for three dimensional imaging using multi-phased structured light. Measurement of dimensions as small as two hundred microns within one percent accuracy is possible, and multiple scans of a target object, such as the solder pads on an electronic circuit board substrate, are not required. A light source, having a pair of synchronized lamps and a specially designed reticle, projects two different phases of structured light onto a target object. The two phases are projected nearly instantaneously, and the detector is able to discriminate between the two exposures presented by the two out of phase illuminations. The method for presenting the three dimensional image uses filtering techniques and certain assumptions to resolve intensity equations having three unknowns from the two exposures of out of phase structured light.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: April 11, 2000
    Assignee: CyberOptics Corporation
    Inventors: Eric P. Rudd, David Fishbaine, Paul R. Haugen, David M. Kranz
  • Patent number: 5430354
    Abstract: A ballast for lighting an auxiliary source of illumination whenever a primary source of illumination fails to ignite. The auxiliary source of illumination is effectively turned OFF by placing a short circuit thereacross whenever the primary source of illumination is lit. The short circuit is removed whenever the primary source of illumination fails to reach a predetermined level of illumination thereby permitting current to flow through and light the auxiliary source of light. The ballast also includes a power factor correction device for increasing the ballast power factor when the primary source of light reaches a predetermined level of illumination.
    Type: Grant
    Filed: November 24, 1992
    Date of Patent: July 4, 1995
    Assignee: North American Philips Corporation
    Inventors: Glenn D. Garbowicz, Edmond Daniel, Joseph S. Droho
  • Patent number: 5341041
    Abstract: An improved cell for use in a mask programmable gate array is disclosed herein. The preferred cell comprises two compute sections, each comprising two pairs of medium size P and N-channel transistors, two small N-channel transistors, and a single small P-channel transistor. Each cell also comprises a high efficiency drive section containing a single bipolar pull-up transistor, a large N-channel pull-down transistor, and a small P-channel transistor. By using this cell, an extremely high compute capability per die area is achieved.
    Type: Grant
    Filed: August 8, 1991
    Date of Patent: August 23, 1994
    Assignee: SiArc
    Inventor: Abbas El Gamal
  • Patent number: 5325241
    Abstract: A write precompensation circuit employs a frequency synthesizer for providing a variable timing signal linked to variable transfer rate in a track zone recording system of a disk drive. The synthesizer also provides an operating frequency current sense signal that is used to generate bit shift of data bits being recorded. A ramp voltage on a ramp capacitor and a logic signal from a bit shift decision circuit are determinative of the magnitude and direction of bit shift, early or late. The VCO and its capacitor are formed on the same IC chip as the ramp capacitor thereby minimizing mismatch due to tolerances inherent in production and operation of electrical components.
    Type: Grant
    Filed: June 14, 1991
    Date of Patent: June 28, 1994
    Assignee: Fujitsu Limited
    Inventors: Rodney A. L. Mattison, David E. Norton, Jr.
  • Patent number: 5304859
    Abstract: A semiconductor device having an internal voltage down converter includes a circuit operating with an externally applied power supply voltage, a circuit operating with an internal stepped-down voltage as an operation power supply voltage, and substrate voltage generators for generating a substrate bias voltage according to a state of the internal stepped-down voltage. The present invention makes it possible to stably apply a substrate voltage corresponding to an operation voltage to the substrate region.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: April 19, 1994
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Kazutami Arimoto
  • Patent number: 5303093
    Abstract: A noise reduction apparatus wherein a sampled digital data is compared with a first threshold value (t) to average the digital data during a period while the level of low frequency components containing jitter noises is a predetermined threshold level or lower, an averaging operation for the digital data after a predetermined number of sampling points continues if a difference value between previously and presently obtained digital data takes a second threshold value (tp) or lower, the averaged digital data obtained during a predetermined number of rotations of a rotary head is converted into an analog signal, and the analog signal is subtracted from a reproduced signal.
    Type: Grant
    Filed: May 31, 1991
    Date of Patent: April 12, 1994
    Assignee: Victor Company of Japan, Ltd.
    Inventor: Satoshi Kawasaki
  • Patent number: 5300862
    Abstract: A display addressing method applied in conjunction with an array of cold cathode field emission micro-emitters employs a row-by-row addressing technique in concert with controlled constant current sources connected simultaneously to each column of the array of emitters to provide a novel addressing scheme which yields an improvement in cathodoluminescent display brightness on the order of a full order of magnitude over that of the prior art.
    Type: Grant
    Filed: June 11, 1992
    Date of Patent: April 5, 1994
    Assignee: Motorola, Inc.
    Inventors: Norman W. Parker, James E. Jaskie, Robert C. Kane
  • Patent number: 5298836
    Abstract: A power supply circuit for any kind of loads or power consuming devices which are connected to an electrical power supply; especially lamps, such as at least one glow or gas discharge lamp, wherein a pulse width modulator controls electronic switches of a push-pull oscillator, and wherein the pulse frequency of the pulse width modulator is tuned to the resonant frequency of a resonant transformer of the push-pull oscillator which has the secondary side thereof connected to the gas discharge lamp. A control circuit monitors a current and/or voltage value and/or time value which is characteristic for the presence of the resonance and which, upon a change in the resonant frequency, will change the pulse frequency of the pulse width modulator to ensure operation at the new resonant frequency.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: March 29, 1994
    Assignee: Diehl GmbH & Co.
    Inventors: Peter Backmund, Gottfried Stockinger, Helmut Losel
  • Patent number: 5297099
    Abstract: An integrated circuit, in which some areas of the chip are powered from battery, but at least two other areas of the chip can draw power from independent on-chip power-storage capacitors (which are diode-isolated to accumulate charge from an external signal line). The signal line's input buffer draws power from one capacitor, and the decoder logic draws power from another. Thus, even if the first capacitor is depleted by the signal line's staying in the high-current regime, it will be powered up again when the signal line is again driven high; and the charge stored in the second capacitor will permit the decoding logic to operate. Preferably the second capacitor also powers circuitry which encodes a unique serial number for the chip. Thus, even after the battery has died, the chip can be interrogated to ascertain its unique serial number.
    Type: Grant
    Filed: July 10, 1991
    Date of Patent: March 22, 1994
    Assignee: Dallas Semiconductor Corp.
    Inventors: Michael L. Bolan, Clark R. Williams
  • Patent number: 5295123
    Abstract: First tune information of playing information is read out from playing information storage means to a selected one of predetermined positions and then a selected one of a plurality of pieces of second tune information is read out without incurring the possibility of introducing discontinuity or unnaturalness between musical sounds reproduced from the first tune information and the second tune information.The predetermined positions on the first tune information are made to correspond to the plurality of pieces of second tune information, and control means is provided for controlling tune information read means so that when the first tune information has been read out to the selected one of the predetermined positions respectively corresponding to the plurality of pieces of second tune information, that one of the pieces of second tune information corresponding to the selected predetermined position is automatically read out.
    Type: Grant
    Filed: November 14, 1991
    Date of Patent: March 15, 1994
    Assignee: Roland Corporation
    Inventors: Kazuyuki Seri, Mineyuki Noda, Toshio Yamabata
  • Patent number: 5295122
    Abstract: Disclosed is a flying head of a magneto-optical recording apparatus, in which a thin film magnetic head is provided separately from an air slider and stuck to a side wall of a light path aperture portion, the portion of the wall surface to which the thin film magnetic head is attached is made inclined so that the flying head has a superior flying characteristic, the modulation of a magnetic field can be performed at a high speed, and the peak position of distribution of intensity of a laser beam is made to align with the peak position of distribution of intensity of a magnetic field.
    Type: Grant
    Filed: July 8, 1992
    Date of Patent: March 15, 1994
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Akemi Murakami, Hideo Kobayashi, Kiichi Ueyanagi
  • Patent number: 5295124
    Abstract: An optical recording apparatus employing a method of halting a recording operation halfway a unitary frame of additional information and capable of realizing an exact operation in recording the additional information at the joint of preceding and present record portions. Out of the last unitary frame of the additional information in the preceding operation, the remaining information portion not included in the preceding record is generated, at the beginning of an additional recording mode, by an address information generator 4 from the content stored in an address information memory 6.
    Type: Grant
    Filed: June 22, 1992
    Date of Patent: March 15, 1994
    Assignee: Sony Corporation
    Inventor: Yukio Shirako
  • Patent number: 5293568
    Abstract: The present invention reads out track addresses written onto ID sections of a recording medium, for example, from five, tracks of the plurality of tracks read out simultaneously, to execute demodulation and error correction. In case where the addresses are multiple-written onto the ID sections, the optical spot judges the track address of the desired track on the basis of the plurality of read-out track addresses until the optical spot passes through the remaining track address. Further, in case where there is only a single one of the track addresses written on said ID sections, the track addresses are read out one by one, are demodulated and are error-corrected. The track address of the desired track is judged on the basis of the plurality of read-out track addresses, prior to the fact that the optical spot enters an information recording area.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: March 8, 1994
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Mitsuo Oshiba, Kazutake Sugawara
  • Patent number: 5293098
    Abstract: A power supply for an electroluminescent lamp. The power supply includes an inverter circuit for conveying a DC voltage into a 2000 Hz sinusoidal voltage. The lamp is capacitive in its nature and changes its capacitive value over extended use which adjusts the output frequency of the inverter. A sensor and timers are included which in combination flash the lamp in a predetermined pattern when motion is detected by the sensor.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: March 8, 1994
    Assignee: SEG Corporation
    Inventor: Greg A. Brownell
  • Patent number: 5291101
    Abstract: An electronic ballast for use with a fluorescent lamp. A pair of oppositely poled diodes connected in parallel with a transformer used to drive the switching transistors of an inverter in the ballast, ensuring operation of the transistors at zero current crossing.
    Type: Grant
    Filed: July 28, 1992
    Date of Patent: March 1, 1994
    Assignee: Micro Technology, Inc.
    Inventor: T. Chandrasekaran
  • Patent number: 5291299
    Abstract: The invention relates to a power supply and control unit for a light system, especially an airport approach light system, for making a number of lights go on and out as a progressive light front. The invention is also concerned with a lighting unit (1) suitable for use in combination with this power supply and control unit.
    Type: Grant
    Filed: March 6, 1992
    Date of Patent: March 1, 1994
    Assignee: Idman Oy
    Inventor: Juhani Karna
  • Patent number: 5287335
    Abstract: On a record surface of an optical disk whereon basic information is recorded in a first mode of using surface irregularities, such as pits and lands, a layer of an information recording medium is formed for record and reproduction of additional information in a second mode which is different from the first mode. The information recording medium may be either a magneto-optical recording medium or a write-once recording medium. When the surface irregularities are formed along a record track with a first density, the additional information is preferably recorded in the layer of the write-once recording medium by using a second density different from the first density as the second mode along an additional track which is on the record track.
    Type: Grant
    Filed: July 24, 1992
    Date of Patent: February 15, 1994
    Assignee: NEC Corporation
    Inventor: Yoshikazu Ichiyama
  • Patent number: 5285324
    Abstract: A magnetic reading and/or recording apparatus includes a plurality of magnetic reading and/or recording elements to read and/or record information from/on a flexible magnetic recording material and a flexible plate having several cut-outs arranged to define individual flexible sections of said plate between respective pairs of said cut-outs. The magnetic reading and/or recording elements and the flexible plate are arranged to position the flexible sections of the plate to support respective flexible sections of the flexible magnetic recording material substantially in contact with the magnetic reading and/or recording elements.
    Type: Grant
    Filed: May 17, 1991
    Date of Patent: February 8, 1994
    Assignee: Eastman Kodak Company
    Inventors: John G. Weigand, Francis C. Long, Robert J. Blackman
  • Patent number: 5285411
    Abstract: A method and apparatus operate an optical memory to perform bit-slice associative memory operations by storing a plurality of keywords to define a keyword database and accessing the database by means of one of the keywords. Preferably, the plurality of keywords are unique and are used to retrieve data which corresponds individually to the keywords. Operation of the memory is by identification of a keyword, the location of which is to be determined within the memory, for example for data retrieval. The identified keyword is then used effectively as a retrieval mask to access the plurality of keywords. The keyword database and its complement are stored in an optical device with the keyword to be retrieved and its complement being stored in recall optical devices. The keyword database or its complement is repetitively swept by shifting output columnar vectors by one bit position until all bit positions have been swept.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: February 8, 1994
    Assignee: Wright State University
    Inventor: Alastair D. McAulay
  • Patent number: 5283466
    Abstract: A lead frame for a semiconductor device provided with package suspension leads that have one end portion connected to an outer frame and that have the side of the other end portion extending into a resin encapsulation region, and island suspension leads that have one end portion connected to the side portion of the island that does not oppose the outer frame, and another end portion extending and connected to the outer frame in the direction of the side of the island so that a region of a depressed portion is obtained.
    Type: Grant
    Filed: September 27, 1991
    Date of Patent: February 1, 1994
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Kazunori Hayashi