Patents by Inventor Howard P. Layer

Howard P. Layer 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).

  • Measurement circuit for load cell mass comparator
    Patent number: 4541496
    Abstract: The strain gauge bridge circuit located in the load cell of a load cell mass comparator is modified to provide temperature stability by coupling a remotely located temperature compensating circuit between the two normally connected output ends of strain gauges in adjacent arms of the bridge. The compensating circuit is comprised of a pair of series connected low noise, drift free precision resistors of relatively low resistance value compared to the resistance of the strain gauges. The precision resistors are shunted by relatively high valued potentiometers which operate to balance the bridge. One potentiometer additionally includes a series connected high value precision resistor for providing fine balance while the other potentiometer is used for coarse balance.
    Type: Grant
    Filed: March 12, 1984
    Date of Patent: September 17, 1985
    Assignees: Frazier Precision Instrument Company, Inc., Holometrics Inc.
    Inventor: Howard P. Layer
  • Measurement circuit for load cell
    Patent number: RE32631
    Abstract: The strain gauge bridge circuit located in .[.the.]. .Iadd.a .Iaddend.load cell .[.of a load cell mass comparator.]. is modified to provide temperature stability by coupling a remotely located temperature compensating circuit between the two normally connected output ends of strain gauges in adjacent arms of the bridge. The compensating circuit is comprised of a pair of series connected low noise, drift-free precision resistors of relatively low resistance value compared to the resistance of the strain gauges. The precision resistors are shunted by relatively high valued potentiometers which operate to balance the bridge. One potentiometer additionally includes a series connected high value precision resistor for providing fine balance while the other potentiometer is used for coarse balance.
    Type: Grant
    Filed: July 10, 1986
    Date of Patent: March 29, 1988
    Assignees: Frazier Precision Instrument Company, Inc., Holometrics, Inc.
    Inventor: Howard P. Layer