Patents by Inventor Alan G. Metcalfe

Alan G. Metcalfe 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).

  • Method and apparatus for configuring and controlling a load
    Patent number: 5161387
    Abstract: A method of determining and controlling a load by a controller. The method comprises the steps of transmitting a signal for a first predetermined time period on an electrical line having a load in parallel with a capacitor; monitoring the electrical line for electrical activity within a second predetermined time period following the first time period; and controlling the load in response to the presence or absence of the electrical activity.
    Type: Grant
    Filed: April 26, 1991
    Date of Patent: November 10, 1992
    Assignee: American Standard Inc.
    Inventors: Alan G. Metcalfe, Tedd P. Johnson, David M. Foye
  • Thermostat interface for a refrigeration system controller
    Patent number: 5039009
    Abstract: An interface for use between a thermostat and a controller for an HVAC system comprising: means for receiving a plurality of parallel commands from a thermostat where each command represents one of two possible states; means for coverting each of the plurality of parallel commands into a plurality of predetermined values; means for combining the predetermined values in a predetermined manner; and means for transmitting the combined predetermined values to the controller.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: August 13, 1991
    Assignee: American Standard Inc.
    Inventors: Joe M. Baldwin, Merle A. Renaud, Alan G. Metcalfe