Patents by Inventor David C. Carlson

David C. Carlson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8596454
    Abstract: A container mounted on the top step of a stepladder has a bottom wall joined to upright walls providing a chamber for holding tools, paint cans, parts and supplies. A ledge joined to an upright wall has holes and a slot to retain additional tools. Releasable fasteners secure the bottom wall to the top step of a stepladder.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: December 3, 2013
    Inventor: David C. Carlson
  • Patent number: 6714881
    Abstract: A method for time reference compensation in a power metering system, the method comprising monitoring a time-dependent characteristic of incoming AC power over a predetermined local time interval, comparing the monitored characteristic over the predetermined local time interval with the expected value of the characteristic based upon the nominal frequency of the AC power, and calculating a correction to one or more of local real-time and time-based measurements of the power metering system, based on the comparing.
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: March 30, 2004
    Assignee: Square D Company
    Inventors: David C. Carlson, Michael J. Devaney
  • Patent number: 6713997
    Abstract: A metering module for use in a power circuit monitoring system including a circuit monitor having a processor for processing data related to power signals, said metering module comprising at least one sensor for sensing a predetermined property of a power signal and for producing a corresponding sensor signal, and a modular metering circuit for producing data corresponding to said sensor signal for input into said circuit monitor, wherein said metering module is selectively detachable and replaceable relative to said circuit monitor to permit one or more of testing, calibration and repair of said metering module thereby minimizing any interruption in operation of said circuit monitor.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: March 30, 2004
    Assignee: Square D Company
    Inventors: David C. Carlson, M. Jason Thurmond, Jeffrey J. Farago, Kenneth L. McMahon, Thomas J. Seifert, Robert C. Ditmore, Avery D. Long
  • Patent number: 6710115
    Abstract: A group of sealants are described which utilize a by-product of paint booth spray operations. Processed paint booth overspray particles are combined with various resins, curing agents to form the sealant compositions.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: March 23, 2004
    Assignee: L & L Products, Inc.
    Inventors: David C. Carlson, Abraham Kassa, Thomas Guenther
  • Patent number: 6706802
    Abstract: A group of sealants are described which utilize a by-product of paint booth spray operations. Processed paint booth overspray particles are combined with various resins, curing agents to form the sealant compositions.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: March 16, 2004
    Assignee: L & L Products, Inc.
    Inventors: David C. Carlson, Abraham Kassa, Thomas Guenther
  • Publication number: 20030050375
    Abstract: A group of sealants are described which utilize a by-product of paint booth spray operations. Processed paint booth overspray particles are combined with various resins, curing agents to form the sealant compositions.
    Type: Application
    Filed: January 28, 2002
    Publication date: March 13, 2003
    Inventors: David C. Carlson, Abraham Kassa, Thomas Guenther
  • Publication number: 20030036867
    Abstract: A method for time reference compensation in a power metering system, the method comprising monitoring a time-dependent characteristic of incoming AC power over a predetermined local time interval, comparing the monitored characteristic over the predetermined local time interval with the expected value of the characteristic based upon the nominal frequency of the AC power, and calculating a correction to one or more of local real-time and time-based measurements of the power metering system, based on the comparing.
    Type: Application
    Filed: August 14, 2001
    Publication date: February 20, 2003
    Applicant: Square D Company
    Inventors: David C. Carlson, Michael J. Devaney
  • Publication number: 20020109499
    Abstract: A metering module for use in a power circuit monitoring system including a circuit monitor having a processor for processing data related to power signals, said metering module comprising at least one sensor for sensing a predetermined property of a power signal and for producing a corresponding sensor signal, and a modular metering circuit for producing data corresponding to said sensor signal for input into said circuit monitor, wherein said metering module is selectively detachable and replaceable relative to said circuit monitor to permit one or more of testing, calibration and repair of said metering module thereby mimimizing any interruption in operation of said circuit monitor.
    Type: Application
    Filed: February 9, 2001
    Publication date: August 15, 2002
    Inventors: David C. Carlson, M. Jason Thurmond, Jeffrey J. Farago, Kenneth L. McMahon, Thomas J. Seifert, Robert C. Ditmore, Avery D. Long
  • Patent number: 5831428
    Abstract: A metering unit, located in a distributed power network carrying a power-related waveform, comprises a sensor, a generator, and a memory. The sensor senses power-related parameters associated with the power-related waveform. In response to the sensor, the generator generates and transmits data representative of the power-related waveform. The memory is a sector-erasable flash EEPROM having stored therein programmable logic and main functionality firmware for execution by the generator. The logic is programmable by a user and executable by the generator to increase operations performed by the metering unit.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: November 3, 1998
    Assignee: Square D Company
    Inventors: Michael W. Pyle, Lee D. Wallis, David C. Carlson, Donald T. McComas
  • Patent number: 5737231
    Abstract: An improved metering unit is described which samples a power-related waveform and simultaneously captures its analog signal parameters for temperature and all phases of voltage and current, providing a more accurate and clearer waveform sample that effectively detects harmonics problems and does not require signal interpolation methods. The improved metering unit comprises signal conditioning circuitry interfacing with the power line for sensing temperature and all desired phases of voltage and current parameters of the waveform. The metering unit further comprises a processor having a timer output. The timer output controls track and hold circuitry and an A/D converter. The timer output places the track and hold circuitry in the hold mode to simultaneously capture temperature and all the desired phases of voltage and current of the waveform, and, at the same time, the timer output triggers the A/D converter to convert the captured analog signal parameters into digital sample values.
    Type: Grant
    Filed: May 28, 1996
    Date of Patent: April 7, 1998
    Assignee: Square D Company
    Inventors: Michael W. Pyle, David C. Carlson
  • Patent number: 5469997
    Abstract: The rear mounted multi-bicycle steel rack securely locks up to six bicycles for stable, safe and secure transport. The rack mounts into the rear receiver hitch with a simple pin. Up to six bicycles with different tubular frame sizes can be placed on the rack with a securing arm and lock providing stability and security. The hinges provide ease in movement of the arm. The high gloss finish in a variety of colors protects the rack from the weather and road damage. The clear advantages of bicycle rack is the lightweight design, lateral stability, locking feature, adjustment for different bicycle tubular frame sizes and ease of operation.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: November 28, 1995
    Inventor: David C. Carlson
  • Patent number: RE40889
    Abstract: A metering module for use in a power circuit monitoring system including a circuit monitor having a processor for processing data related to power signals, said metering module comprising at least one sensor for sensing a predetermined property of a power signal and for producing a corresponding sensor signal, and a modular metering circuit for producing data corresponding to said sensor signal for input into said circuit monitor, wherein said metering module is selectively detachable and replaceable relative to said circuit monitor to permit one or more of testing, calibration and repair of said metering module thereby minimizing any interruption in operation of said circuit monitor.
    Type: Grant
    Filed: March 29, 2006
    Date of Patent: September 1, 2009
    Inventors: David C. Carlson, Jason M. Thurmond, Jeffrey J. Farago, Kenneth L. McMahon, Thomas J. Seifert, Robert C. Ditmore, Avery D. Long
  • Patent number: D678550
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: March 19, 2013
    Inventor: David C. Carlson