Patents by Inventor Dudley G. Boyd

Dudley G. Boyd 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).

  • Electronic power controller
    Patent number: 5363020
    Abstract: An electrical power controller includes a boost converter, an invertor and an output section. The boost converter includes a control circuit which charges a capacitance from an inductance in accordance with a stream of pulses having a variable duty cycle. A feedback circuit responsive to the power consumed by a load provides an error signal for varying the duty cycle of the pulses. In the invertor, a pair of switches sample the charge on the capacitor to create an AC signal which is introduced to the output section. The sampling frequency in the boost converter is related to the sampling frequency in the invertor by an integer.
    Type: Grant
    Filed: February 5, 1993
    Date of Patent: November 8, 1994
    Assignee: Systems and Service International, Inc.
    Inventors: Nian Chen, Dudley G. Boyd
  • Discharge lamp life and lamp lumen life-extender module, circuitry, and methodology
    Patent number: 5187411
    Abstract: A method of extending discharge lamp life includes slowing electrode deterioration by powering the discharge lamp so that a lamp arc current having a reduced crest factor results, either by retrofitting an existing discharge lamp system with a waveform conditioning module, by powering the discharge lamp with a ballast producing a squarewave-type waveform, or by slowing deterioration of an emissive coating on a discharge lamp electrode by such means as preheating the electrode prior to use in order to bond the emissive coating on the electrode. A discharge lamp system includes a discharge lamp and components operatively coupled to the discharge lamp for supplying a lamp arc current to the discharge lamp that has a reduced crest factor and controlled lamp watt loading, such as a ballast configured to supply a lamp arc current with a waveform that is substantially a squarewave or an existing ballast retrofitted with waveform conditioning circuitry that causes the lamp arc current to have a reduced crest factor.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: February 16, 1993
    Assignee: Systems and Service International, Inc.
    Inventors: Dudley G. Boyd, Nian Chen
  • Discharge lamp life and lamp lumen life-extender module, circuitry, and methodology
    Patent number: 5087861
    Abstract: A method of extending discharge lamp life includes slowing electrode deterioration by powering the discharge lamp so that a lamp arc current having a reduced crest factor results, either by retrofitting an existing discharge lamp system with a waveform conditioning module, by powering the discharge lamp with a ballast producing a squarewave-type waveform, or by slowing deterioration of an emissive coating on a discharge lamp electrode by such means as preheating the electrode prior to use in order to bond the emissive coating on the electrode. A discharge lamp system includes a discharge lamp and components operatively coupled to the discharge lamp for supplying a lamp arc current to the discharge lamp that has a reduced crest factor and controlled lamp watt loading, such as a ballast configured to supply a lamp arc current with a waveform that is substantially a squarewave or an existing ballast retrofitted with waveform conditioning circuitry that causes the lamp arc current to have a reduced crest factor.
    Type: Grant
    Filed: September 1, 1989
    Date of Patent: February 11, 1992
    Assignee: Deltove Limited
    Inventors: Dudley G. Boyd, Edward G. Price, Valiant G. Kanaga, Nian Chen