Patents by Inventor Carl J. Nielsen

Carl J. Nielsen 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: 5577890
    Abstract: A pump control and protection system comprised of an analog module and a digital module. The analog module includes a synchronous phase detector, a pressure transducer and an over voltage/under voltage circuit. The synchronous phase detector determines the phase angle between a current signal supplied to a water pump and a voltage signal supplied to the pump. The output of the phase detector is directed to a programmable array logic device in the digital module and used to activate a solid state relay that controls the power supplied to the pump. The water pressure in the system is displayed on a digital display.
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: November 26, 1996
    Assignee: Trilogy Controls, Inc.
    Inventors: Carl J. Nielsen, Joseph E. Troccoli
  • Patent number: 4432067
    Abstract: A decoding circuit is coupled to the signal lines that communicate address signals to a memory unit. When a predetermined address is communicated, the decoding circuit produces a supplemental signal that is coupled to the memory unit and used to select one of a plurality of groups of memory locations. The communicated address signals specify the memory location of the selected group to be accessed.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: February 14, 1984
    Assignee: Atari, Inc.
    Inventor: Carl J. Nielsen
  • Patent number: 4368515
    Abstract: A decoding circuit is coupled to the signal lines that communicate address signals to a memory unit. When a predetermined address is communicated, the decoding circuit produces a supplemental signal that is coupled to the memory unit and used to select one of a plurality of groups of memory locations. The communicated address signals specify the memory location of the selected group to be accessed.
    Type: Grant
    Filed: May 7, 1981
    Date of Patent: January 11, 1983
    Assignee: Atari, Inc.
    Inventor: Carl J. Nielsen