Patents Assigned to S & F Associates
  • Patent number: 4252028
    Abstract: Method and apparatus for measuring mass flow, and particularly the sum or difference in mass flow of distinct streams of flowing materials, wherein a plurality of channels are provided in one or more conduits rotating or oscillating as a common unit with additive streams or a common stream being flowed through the channels in a first direction and subtractive streams being flowed through the channels in an opposite direction, and in which the net Coriolis force imposed upon the conduit unit is measured.
    Type: Grant
    Filed: February 26, 1979
    Date of Patent: February 24, 1981
    Assignee: S & F Associates
    Inventors: James E. Smith, A. J. Mims, Michael D. Anfinson
  • Patent number: 4187721
    Abstract: Apparatus and method for mass flow measurement utilizing a substantially "U" shaped conduit mounted in a cantilever manner at the legs thereof, means for oscillating the conduit, and means for measuring the Coriolis force by measurement of the force moment or the angular motion of the conduit around an axis substantially symmetrical to the legs of the conduit. The force moment is measured by sensing incipient movement around the axis, and generating and measuring a nulling force. In preferred embodiments, the oscillating means are mounted on a spring arm having a natural frequency substantially equal to that of the "U" shaped conduit, and in a particularly preferred displacement the measuring means are sensors mounted on the "U" shaped conduit and adapted to measure, with proper direction sense, the time differential between the leading and trailing portions of the "U" shaped conduit passing through the plane of the "U" shaped conduit at substantially midpoint of the oscillation thereof.
    Type: Grant
    Filed: July 20, 1978
    Date of Patent: February 12, 1980
    Assignee: S & F Associates
    Inventor: James E. Smith
  • Patent number: 4109524
    Abstract: Method and apparatus for measuring mass flow rate of a fluid substance flowing in a conduit by reciprocating a section of conduit at an end thereof with the other end thereof pivotally mounted, and measuring the torque generated by the Coriolis force, and preferably reciprocating two similar sections of conduit at the inlet end of one and the outlet end of the other, both being pivotally secured at the nonreciprocated ends, to substantially balance inertial forces, the torque preferably being measured at peak angular velocity of the conduit section.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: August 29, 1978
    Assignee: S & F Associates
    Inventor: James E. Smith