Patents by Inventor Carl Mattoon

Carl Mattoon 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).

  • Publication number: 20070150214
    Abstract: An apparatus and method for compensating digital input delay in an intelligent electronic device is provided. A method is provided which provides for accurate SER data recording while facilitating the reduction of processing burden on the IED and optimization of system performance during the processing of SER data flow. An apparatus is further provided which generally includes a time delay element coupled to a sequential events recorder for compensating for delay in communication of a data signal such that the sequential events recorder records a compensated time for a select event based on the clock and the time delay. An apparatus is provided which includes an edge detection element for detecting either a rising or falling edge from the data signal.
    Type: Application
    Filed: December 21, 2006
    Publication date: June 28, 2007
    Inventors: Bai-Lin Qin, Max Ryan, Daniel Dwyer, Carl Mattoon
  • Publication number: 20050078425
    Abstract: An overcurrent protective relay includes means for obtaining current values from a power line which are adjusted for application to and use by a processor portion of the relay. The processor evaluates the adjusted power line current values against an overcurrent curve by which, as the current increases from a continuous rating, the time to trip decreases. A thermal limit I2t curve is combined with the time overcurrent curve, the curves being arranged so that the thermal limit curve crosses over the time overcurrent curve at a selected current value. In such a case, the thermal limit curve controls the time to trip for current fault values above the selected current value and the inverse time overcurrent curve controls the time to trip for fault current values below the selected current value.
    Type: Application
    Filed: October 10, 2003
    Publication date: April 14, 2005
    Inventors: Robert Morris, Jacob Reidt, Brian Zabriskie, Carl Mattoon
  • Publication number: 20050052274
    Abstract: An RTD system includes multiple pluralities of RTDs and RTD bank assembly to which each plurality of RTDs are connected. Each RTD bank assembly includes a current source for the RTDs connected thereto, a multiplexer switching system for switching the current source successively between the RTDs, and a measurement function for measuring the voltage drop across the RTDs produced by the current source. The system includes a circuit for determining resistance of the RTD from the current applied thereto and the voltage drop there across. The system further includes a plurality of low pass filters associated, respectively, with each RTD, wherein the low pass filters are charged before the voltage measurement is made. The system includes a precharging arrangement where the low pass filter associated with the next RTD in a voltage sampling sequence is precharged, so that the delay between sampling of the voltage from the low pass filters associated with successive RTDs is significantly reduced.
    Type: Application
    Filed: September 9, 2003
    Publication date: March 10, 2005
    Inventors: Carl Mattoon, Travis Mooney