Patents by Inventor Larry A. Lindner

Larry A. Lindner 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).

  • Power factor measuring cut-off arrangement for and method of protecting a ballast-starter circuit from high pressure sodium lamp cycling malfunction
    Patent number: 4473779
    Abstract: A cycling cut-off arrangement protects a ballast-starter circuit of a luminaire of the type having a high pressure sodium lamp from damage in the event of a cycling malfunction by sensing the change in power factor across the lamp during cycling, and disabling the ballast-starter circuit from its power source once cycling has been reliably detected. The method of sensing the power factor change, and of disabling the ballast-starter circuit is also disclosed, as well as a method of installing the arrangement on the luminaire with minimum retro-fitting required.
    Type: Grant
    Filed: May 26, 1982
    Date of Patent: September 25, 1984
    Assignee: Area Lighting Research, Inc.
    Inventors: Larry A. Lindner, George Duve, Gilman Hallenbeck