Patents by Inventor Henry J. Colbert

Henry J. Colbert 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).

  • Method and apparatus for manufacturing a surge arrester
    Patent number: 5159748
    Abstract: A distribution class surge arrester comprises a core formed of distributed zinc oxide varistor blocks, aluminum blocks acting as heat sinks and as spacers providing voltage grading and required arcing distances, and terminal blocks held in face-to-face contact by means of a glass reinforced epoxy shell which is formed by winding a pre-preg onto the assembled blocks and thermally curing under mold pressure within an evacuated mold. The core is housed within a polymeric shedded housing which is formed by shrinking a heat-shrink shedded sleeve onto the core with a sealant provided in the interface of the core and the sleeve, and end caps are sealed to the ends of the structure thus formed.
    Type: Grant
    Filed: March 21, 1991
    Date of Patent: November 3, 1992
    Inventors: Rodney M. Doone, Henry J. Colbert
  • Method and apparatus for manufacturing a surge arrester
    Patent number: 5003689
    Abstract: A distribution class surge arrester comprises a core formed of distributed zinc oxide varistor blocks, aluminum blocks acting as heat sinks and as spacers providing voltage grading and required arcing distances, and terminal blocks held in face-to-face contact by means of a glass reinforced epoxy shell which is formed by winding a pre-preg onto the assembled blocks and thermally curing under mold pressure within an evacuated mold. The core is housed within a polymeric shedded housing which is formed by shrinking a heat-shrink shedded sleeve onto the core with a sealant provided in the interface of the core and the sleeve, and end caps are sealed to the ends of the structure thus formed.
    Type: Grant
    Filed: March 5, 1990
    Date of Patent: April 2, 1991
    Assignee: Bowthorpe EMP Limited
    Inventors: Rodney M. Doone, Henry J. Colbert
  • Use of a surge arrester as a combined surge arrester and support insulation
    Patent number: 4992906
    Abstract: A distribution class surge arrester having a core formed of distributed zinc oxide varistor blocks, aluminum blocks acting as heat sinks and as spacers providing voltage grading and required arcing distances, and terminal blocks held in face-to-face contact by means of a glass reinforced epoxy shell which is formed by winding a pre-preg onto the assembled blocks and thermally curing under mold pressure within an evacuated mold. The core is housed within a polymeric shedded housing which is formed by shrinking a heat-shrink shedded sleeve onto the core with a sealant provided in the interface of the core and the sleeve, and end caps are sealed to the ends of the structure thus formed.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: February 12, 1991
    Assignee: Bowthorpe EMP Limited
    Inventors: Rodney M. Doone, Henry J. Colbert
  • Electrical surge arrester/diverter having a heat shrink material outer housing
    Patent number: 4851955
    Abstract: A distribution class surge arrester comprises a core formed of distributed zinc oxide varistor blocks, aluminum blocks acting as heat sinks and as spacers providing voltage grading and required arcing distances, and terminal blocks held in face-to-face contact by means of a glass reinforced epoxy shell which is formed by winding a pre-preg onto the assembled blocks and thermally curing under mold pressure within an evacuated mold. The core is housed within a polymeric shedded housing which is formed by shrinking a heat-shrink shedded sleeve onto the core with a sealant provided in the interface of the core and the sleeve, and end caps are sealed to the ends of the structure thus formed.
    Type: Grant
    Filed: October 29, 1986
    Date of Patent: July 25, 1989
    Assignee: Bowthorpe EMP Limited
    Inventors: Rodney M. Doone, Henry J. Colbert