Patents by Inventor J. Delvin Armstrong

J. Delvin Armstrong 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).

  • Lighting system for playing fields
    Patent number: 5274534
    Abstract: The illumination system includes a plurality of illumination structures (10), the illumination structures being arranged around the periphery of the playing field. Each illumination structure (10) includes a mounting pole (12) and a plurality of luminaires which are individually mounted by mounting arms from the pole. The luminaires are cut-off forward-throw luminaires. The luminaires are arranged relative to each other such that each luminaire, respectively, does not block light originating from any of the other luminaires.
    Type: Grant
    Filed: April 8, 1992
    Date of Patent: December 28, 1993
    Inventor: J. Delvin Armstrong
  • Apparatus for promoting plant growth with artificial light
    Patent number: 4078169
    Abstract: An elongated light source is positioned at the focal point of a reflector which is shaped so that the majority of the light generated by the light source is provided over a 60.degree. included angle along its length, uniformly illuminating a defined area on a light delivery plane, the defined area having a longitudinal dimension equal to the length of the light source, and a transverse dimension equal to the distance between the reflector and the light delivery plane.
    Type: Grant
    Filed: August 23, 1976
    Date of Patent: March 7, 1978
    Inventor: J. Delvin Armstrong