Patents by Inventor Jan Palmquist

Jan Palmquist 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).

  • Detection of static and/or quasi-static magnetic fields in magnetoelastic force and torque transducers
    Patent number: 5122742
    Abstract: The content of even harmonics is used in both a method and apparatus for the detection of the disturbing static and quasi-static magnetic fields effects in measurement systems using force and torque transducers operating with magnetoelastic effect. The even harmonic content corresponds to the degree of static and/or quasi-static magnetization and is an input signal to a regulator the aid of the direct current in, for example, a separate winding, reduces the static and/or quasi-static magnetization to zero.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: June 16, 1992
    Assignee: Asea Brown Bovert AB
    Inventors: Bertil Hoffman, Sverker Nidmark, Jan Palmquist, Jarl Sobel