Patents by Inventor Douglas W. Caldwell

Douglas W. Caldwell 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: 8365719
    Abstract: A system architecture for large concentrated solar power applications that increases heliostat utilization efficiency and land utilization efficiency is described. Embodiments of the invention include a large heliostat field in which are distributed a number of receiving locations, and wherein there is the assignment of heliostats to receiving locations is dynamic. Embodiments of the invention include dynamically targeting heliostats to receiving locations wherein the target determination process is performed frequently during operation and wherein such dynamic targeting can be utilized to various ends. Embodiments of the invention include configurations wherein cosine losses associated with heliostat pointing are significantly reduced, wherein heliostats may be closely packed without incurring substantial shadowing and blocking losses thereby significantly increasing land utilization, and wherein other benefits are realized.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: February 5, 2013
    Assignee: Angeles Technologies, Inc.
    Inventor: Douglas W. Caldwell
  • Publication number: 20090260619
    Abstract: Heliostat operation under significantly reduced infrastructure requirements is disclosed. As part of a larger solar power generation system, a heliostat may function autonomously to track the sun and maintain constant reflection of solar radiation to a collection device for conversion to electrical power. The heliostat employs a local independent solar power supply to provide power to the positioning mechanism and controller for the heliostat. The controller receives sun position information from a sensor and/or a predetermined schedule. In addition, the controller for the heliostat may incorporate a wireless communications device for remote monitoring and directing operations of the heliostat.
    Type: Application
    Filed: April 20, 2008
    Publication date: October 22, 2009
    Applicant: The Boeing Company
    Inventors: Lee Bailey, Douglas W. Caldwell, Russell K. Jones
  • Publication number: 20090038608
    Abstract: A system architecture for large concentrated solar power applications that increases heliostat utilization efficiency and land utilization efficiency is described. Embodiments of the invention include a large heliostat field in which are distributed a number of receiving locations, and wherein there is the assignment of heliostats to receiving locations is dynamic. Embodiments of the invention include dynamically targeting heliostats to receiving locations wherein the target determination process is performed frequently during operation and wherein such dynamic targeting can be utilized to various ends. Embodiments of the invention include configurations wherein cosine losses associated with heliostat pointing are significantly reduced, wherein heliostats may be closely packed without incurring substantial shadowing and blocking losses thereby significantly increasing land utilization, and wherein other benefits are realized.
    Type: Application
    Filed: August 7, 2007
    Publication date: February 12, 2009
    Inventor: Douglas W. Caldwell
  • Patent number: 7036773
    Abstract: The present invention allows a payload to be launched from the exterior of a conventional launch vehicle with little integration expense. In one example, the invention includes an aerodynamic fairing having an internal cavity to contain a payload, a mounting adapter to attach the fairing to an exterior surface of a launch vehicle, and a release mechanism to separate the payload from the launch vehicle out of the fairing cavity during the launch vehicle's flight.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: May 2, 2006
    Assignee: Ecliptic Enterprises Corporation
    Inventor: Douglas W. Caldwell
  • Patent number: 5036457
    Abstract: An apparatus and method, for use with a computer, for converting an uncompressed one-dimensional array of binary bits into a compressed binary bit string and/or for processing a Boolean operation on a first and a second compressed bit string. The first and second bit strings each contain one or more impulses. An impulse contains a run, which is a string of one or more bits of the same binary value, and an ending bit having a polarity opposite the polarity of the run. The impulses are encoded in one or more compressed impulse formats. Each compressed impulse format contains at least a first and a second indicator. The first indicator is for indicating the binary value of one or more same polarity bits of the run and the second indicator is for indicating the length of bits of the impulse. The length of bits is a quantity of the same polarity bits of the run and/or the ending bit having a polarity opposite the run.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: July 30, 1991
    Assignee: Nucleus International Corporation
    Inventors: Edward L. Glaser, Paul R. DesJardins, Douglas W. Caldwell, Eliot D. Glaser