Patents by Inventor Gregory L. Griswold

Gregory L. Griswold 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).

  • Bin level control circuit and transducer mounting system for an ice making machine
    Patent number: 5172595
    Abstract: An ultrasonic bin level control circuit which employs a fail-safe circuit to shut off a compressor when echoes are late or absent, and a transducer mounting system which facilitates installation and removal of a transducer for servicing and cleaning. A level detector compares a reference signal with a reflected signal, the ice reaching a desired level when the reflected signal overlaps the reference signal. When the desired level is reached, the reference signal is modified through feedback to prevent short cycling of the compressor. The transducer is installed within a cylindrical housing which is easily installed and removed from a cylindrical socket within a compartment above the bin.
    Type: Grant
    Filed: October 24, 1991
    Date of Patent: December 22, 1992
    Assignee: Scotsman Group, Inc.
    Inventors: Vincent N. Bush, Gregory L. Griswold
  • Bin level control circuit and transducer mounting system for an ice making machine
    Patent number: 5060484
    Abstract: An ultrasonic bin level control circuit which employs a fail-safe circuit to shut off a compressor when echoes are late or absent, and a transducer mounting system which facilitates installation and removal of a transducer for servicing and cleaning. A level detector compares a reference signal with a reflected signal, the ice reaching a desired level when the reflected signal overlaps the reference signal. When the desired level is reached, the reference signal is modified through feedback to prevent short cycling of the compressor. The transducer is installed within a cylindrical housing which is easily installed and removed from a cylindrical socket within a compartment above the bin.
    Type: Grant
    Filed: June 12, 1990
    Date of Patent: October 29, 1991
    Assignee: Scotsman Group, Inc.
    Inventors: Vincent N. Bush, Gregory L. Griswold