Patents by Inventor Charles R. Bartlett

Charles R. Bartlett 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).

  • Inductor for annealing work hardened portions of structural beams
    Patent number: 4458127
    Abstract: A method and inductor are provided for annealing the corners of an elongate hollow structural beam in which the corners become work hardened when the beam is produced by cold working initially flat metal plate to the hollow beam configuration. The corners of the beam are inductively heated progressively along the length of the beam in a manner which concentrates heat in the corners and controls the spreading of heat into the sides of the beam from the corners so that the work hardened areas are annealed to provide for the corners and walls to be more uniform in hardness and strength in connection with use of the beam as a structural member.
    Type: Grant
    Filed: February 17, 1983
    Date of Patent: July 3, 1984
    Assignee: Park-Ohio Industries, Inc.
    Inventors: James J. Pusateri, Charles R. Bartlett, Paul D. Brazie
  • Method for annealing work hardened portions of structural beams
    Patent number: 4401486
    Abstract: A method and inductor are provided for annealing the corners of an elongate hollow structural beam in which the corners become work hardened when the beam is produced by cold working initially flat metal plate to the hollow beam configuration. The corners of the beam are inductively heated progressively along the length of the beam in a manner which concentrates heat in the corners and controls the spreading of heat into the sides of the beam from the corners so that the work hardened areas are annealed to provide for the corners and walls to be more uniform in hardness and strength in connection with use of the beam as a structural member.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: August 30, 1983
    Assignee: Park-Ohio Industries, Inc.
    Inventors: James J. Pusateri, Charles R. Bartlett, Paul D. Brazie