Patents Assigned to PSW Associates
  • Electrically calibrated air gauging apparatus
    Patent number: 4125011
    Abstract: An electrically calibrated air gauging apparatus for measuring or comparing dimensions is disclosed. The apparatus is calibrated with only electrical adjustments and does not require the difficult pneumatic adjustments associated with prior devices. A monolithic, semiconductor pressure transducer is employed to sense the air pressure in the probe line. The apparatus includes a linear mode which provides an extended range of display readings proportional to the deviation of an unknown dimension from a known dimension.
    Type: Grant
    Filed: January 30, 1978
    Date of Patent: November 14, 1978
    Assignee: PSW Associates
    Inventor: David E. Porter