Patents by Inventor William Holmgren

William Holmgren 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: 20140149038
    Abstract: A measurement system and method of forecasting time-dependent corrections into a power output of photovoltaic power generators based on a determination of time-dependent shading of photovoltaic cells. Identification of cloud positioning in the sky is based on recordation of images of a scene within a field-of-view FOV that optionally subtends the Sun, base on which images a velocity vector associated with cloud movement is computed to form output associated with time when clouds will shade power generators in question. A method for producing a weather forecast based on such corrections.
    Type: Application
    Filed: November 26, 2013
    Publication date: May 29, 2014
    Inventors: Alexander D. Cronin, Vincent Lonji, William Holmgren, Antonio Lorenzo, Eric Betterton, Michael S. Leuthold
  • Patent number: 4924172
    Abstract: A novel thin, three-terminal capacitive transducer which is positioned in a clearance gap to be measured is presented. This transducer comprises an insulated assembly having three parallel conductive planes with the first and second plane each containing a single electrode and the third plane containing a pair of spaced electrodes. Preferably, each electrode is composed of a thin layer of copper mounted on an insulated substrate such as an epoxy-glass composite. An air space is provided between each of the pair of electrodes in the third plane and the single electrode in the second plane. Another important feature of the present invention is a novel electronic circuit for use in conjunction with the novel three terminal capacitive transducer. This circuit provides a means of "synthetic resonance" whereby a small capacitance (such as generated by the three-terminal capacitive sensor of this invention) functions as if it were at or near series resonance with a synthesized large inductance.
    Type: Grant
    Filed: August 25, 1988
    Date of Patent: May 8, 1990
    Assignee: Kaman Instrumentation Corporation
    Inventor: William A. Holmgren
  • Patent number: 4816759
    Abstract: An inductive displacement sensor includes an oscillator circuit that is characterized by primary and secondary pairs of coils disposed on opposing surfaces of adjacent optical segments. Each coil in both coil pairs is alternately positioned along a respective axes perpendicular to a segment displacement axis. The secondary coils are respectively tuned to frequencies above and below the oscillator circuit resonant frequency. Any motion between segments along the displacement axis induces a detectable change in phase between the current and voltage of the oscillator signal.
    Type: Grant
    Filed: October 28, 1987
    Date of Patent: March 28, 1989
    Assignee: Kaman Corporation
    Inventors: Gregory H. Ames, William A. Holmgren, A. Lee Widener
  • Patent number: 4160204
    Abstract: This distance measurement system employs the principle of electromagnetic induction to sense distances between an inductive transducer and an object. The inductive transducer forms a part of a signal phase network, and a means for comparing the signal of the inductive transducer to a reference signal provides linear output of the dimension between the transducer and an object. A circuit element such as a capacitor is connected in parallel with the inductive transducer to enhance the sensitivity and resolution of the measurement, to significantly reduce or eliminate error due to temperature, and to provide a high degree of output linearity relative to the distance measured.
    Type: Grant
    Filed: November 11, 1974
    Date of Patent: July 3, 1979
    Assignee: Kaman Sciences Corporation
    Inventors: William A. Holmgren, John S. Hasling, Richard W. Denny