Patents Examined by Stephen C. Buczinsk
  • Optical sensor for duct fan discharge mach numbers
    Patent number: 5463458
    Abstract: A Mach number sensor comprises a first pulse speed sensor situated in direct contact with an open area through which a first pressure pulse can pass and a second pulse speed sensor situated in a thermally conductive tube with membrane-covered ends having stationary air through which a second pressure pulse can pass. Each of the first and second pulse speed sensors may comprise two total internal reflection detectors and a timer for determining elapsed time for passage of the pressure pulse between the two detectors.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: October 31, 1995
    Assignee: General Electric Company
    Inventor: Ertugrul Berkcan