Patents by Inventor James E. Roulstone

James E. Roulstone 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).

  • Guage and method for measuring tapered internal and external threads
    Patent number: 4567670
    Abstract: A thread guage for indirectly determining the pitch diameter and taper of threads on casing and tubing is disclosed. In the preferred and illustrated embodiment, the thread guage includes a pair of adjustable thread engaging arm assemblies mounted on a bar member. The arm assemblies are selectively locked along the bar member, the distance between the arm assemblies being a fixed position corresponding to a specified thread size. At least two indicators are mounted on one of the arm assemblies providing a value of the measured thread dimensions relative to a standard, which value is used to determine pitch diameter and taper of the thread.
    Type: Grant
    Filed: July 16, 1984
    Date of Patent: February 4, 1986
    Inventor: James E. Roulstone
  • Flood light
    Patent number: D304623
    Type: Grant
    Filed: June 24, 1987
    Date of Patent: November 14, 1989
    Assignee: Innovative Controls, Inc.
    Inventor: James E. Roulstone
  • Fluorescent lighting fixture
    Patent number: D306773
    Type: Grant
    Filed: June 24, 1987
    Date of Patent: March 20, 1990
    Assignee: Innovative Controls, Inc.
    Inventor: James E. Roulstone
  • Wall mounted luminaire
    Patent number: D307328
    Type: Grant
    Filed: June 24, 1987
    Date of Patent: April 17, 1990
    Assignee: Innovative Controls, Inc.
    Inventor: James E. Roulstone