Patents by Inventor John L. Pillsbury

John L. Pillsbury 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).

  • Power demand limiting circuit
    Patent number: 4141407
    Abstract: A power demand limiting circuit is disclosed comprising air temperature control apparatus coupled with a municipal source of electric current through a thermo-responsive switch, through a meter having means for measuring maximum power demand for any period in a succession of periods of preselected duration, and through a timer programmed to cycle a timer switch at least once during each of the periods, whereby the air temperature control apparatus is rendered incapable of demanding power continuously throughout any of the metered periods.
    Type: Grant
    Filed: March 29, 1977
    Date of Patent: February 27, 1979
    Inventors: Harry H. Briscoe, John L. Pillsbury