Patents by Inventor Kenneth E. Marrett, Sr.

Kenneth E. Marrett, Sr. 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).

  • Formed metal core blocking method
    Patent number: 4875277
    Abstract: The invention is directed to a formed metal blocking, for mounting within wedge-shaped gaps between coils of a toroidal transformer, including butterfly-shaped top and bottom core blockings. The blockings are formed from identical stampings, each stamping having a pair of U-shaped coil-engaging faces joined along their inner legs by a center web. The stampings are joined back to back and have a number of flanges which are bent over for securing the stampings to one another. The stampings have an apertured tab at the end of the center web used to form a lifting eye for the top blocking. With the bottom blocking, the tabs are folded over for mounting to a base plate. The outer legs of the U-shaped faces are longer than the inner legs and center web to create a gap in the electric path surrounding the core.
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: October 24, 1989
    Assignee: Kuhlman Corporation
    Inventors: Richard W. Martin, John L. Fisher, William R. Fortenberry, Randall L. Schlake, Ronald F. Dornbrock, James D. Richerson, Kenneth E. Marrett, Sr.
  • Formed metal core blocking
    Patent number: 4833436
    Abstract: The invention is directed to a formed metal blocking, for mounting within wedge-shaped gaps between coils of a toroidal transformer, including butterfly-shaped top and bottom core blockings. The blockings are formed from identical stampings, each stamping having a pair of U-shaped coil-engaging faces joined along their inner legs by a center web. The stampings are joined back to back and have a number of flanges which are bent over for securing the stampings to one another. The stampings have an apertured tab at the end of the center web used to form a lifting eye for the top blocking. With the bottom blocking the tabs are folded over for mounting to a base plate. The outer legs of the U-shaped faces are longer than the inner legs and center web to create a gap in the electric path surrounding the core.
    Type: Grant
    Filed: September 12, 1986
    Date of Patent: May 23, 1989
    Assignee: Kuhlman Corporation
    Inventors: Richard W. Martin, John L. Fisher, William R. Fortenberry, Randall L. Schlake, Ronald F. Dornbrock, James D. Richerson, Kenneth E. Marrett, Sr.