Patents by Inventor Lawrence Alden Hubbell

Lawrence Alden Hubbell 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).

  • Linear variable differential transformer with multi-range secondary windings for high precision
    Patent number: 9863787
    Abstract: A linear variable differential transformer (LVDT) having an electrical stroke includes a probe axially movable along a length of the LVDT electrical stroke, a primary winding extending axially over the length of the LVDT electrical stroke, and a secondary winding extending axially over the length of the LVDT electrical stroke. The LVDT further includes a tertiary winding extending axially over less than the length of the LVDT electrical stroke, the tertiary winding at least partially overlapping with the secondary winding. An advantage of the LVDT in accordance with the present disclosure is that the accuracy of the position calculated from the tertiary winding is greater relative to the total stroke of the LVDT than that calculated from the secondary winding. This is accomplished while still fitting within the envelope of a standard single output LVDT.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: January 9, 2018
    Assignee: Parker-Hannifin Corporation
    Inventor: Lawrence Alden Hubbell
  • LINEAR VARIABLE DIFFERENTIAL TRANSFORMER WITH MULTI-RANGE SECONDARY WINDINGS FOR HIGH PRECISION
    Publication number: 20160033306
    Abstract: A linear variable differential transformer (LVDT) having an electrical stroke includes a probe axially movable along a length of the LVDT electrical stroke, a primary winding extending axially over the length of the LVDT electrical stroke, and a secondary winding extending axially over the length of the LVDT electrical stroke. The LVDT further includes a tertiary winding extending axially over less than the length of the LVDT electrical stroke, the tertiary winding at least partially overlapping with the secondary winding. An advantage of the LVDT in accordance with the present disclosure is that the accuracy of the position calculated from the tertiary winding is greater relative to the total stroke of the LVDT than that calculated from the secondary winding. This is accomplished while still fitting within the envelope of a standard single output LVDT.
    Type: Application
    Filed: July 31, 2015
    Publication date: February 4, 2016
    Inventor: Lawrence Alden Hubbell