Patents Examined by James Rowland
  • Robust electronic liquid level gauge
    Patent number: 4482891
    Abstract: A robust electronic liquid level gauge apparatus, particularly suitable for use with boiler drum water column, comprises simple probe sensors in the water column, differential amplifier sensors, detectors responsive only to the simultaneous presence of a minimum level signal and a certain frequency, and logic circuits continuously processing outputs from four detectors: its associated probe detector, the one below, and the two above.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: November 13, 1984
    Inventor: John D. Spencer
  • Noise suppressor for a granulating machine
    Patent number: 3951245
    Abstract: This noise reducing device is arranged in the discharge chute of a material granulating apparatus in which a rapidly rotating knife cuts strips or strands of material into granules. In one embodiment of the device a wing wheel or impeller type of wheel is supported off-center for rotation in a portion of substantially cylindrical cross section of the chute. In another embodiment, angularly arranged plates are positioned substantially oppositely each other in the discharge chute to deflect the granular material so as to follow a zig-zag path.
    Type: Grant
    Filed: August 5, 1974
    Date of Patent: April 20, 1976
    Assignee: Automatik Apparate-Maschinenbau Hans Hench GmbH
    Inventors: Hans Hench, Sr., Friedrich Hunke, Kurt Pohan