Patents by Inventor John Chrisman

John Chrisman 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).

  • Traffic LED lamp with internal circuit backup system
    Patent number: 8248271
    Abstract: In accordance with one aspect of the present exemplary embodiment, an LED lamp is provided. In one embodiment, the LED lamp is made to be mounted in a traffic signal housing that includes other lamps, where the LED lamp can be red, yellow, green or another color and can represent a full ball aspect, an arrow aspect or another aspect. The LED lamp is adapted to be powered by an external power source and includes an input power circuit receiving an input voltage from the external power source. The input power circuit includes a power detection circuit that is adapted to determine a power state of the traffic LED lamp. The LED lamp further includes an LED load and a battery powered driving circuit. The battery power driving circuit drives the LED load if the power state of the LED lamp is in a power failure state.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: August 21, 2012
    Assignee: GE Lighting Solutions, LLC
    Inventors: Mohamed Cherif Ghanem, John Chrisman, Benoit Essiambre, Christian Poirier
  • TRAFFIC LED LAMP WITH INTERNAL CIRCUIT BACKUP SYSTEM
    Publication number: 20100039794
    Abstract: In accordance with one aspect of the present exemplary embodiment, an LED lamp is provided. In one embodiment, the LED lamp is made to be mounted in a traffic signal housing that includes other lamps, where the LED lamp can be red, yellow, green or another color and can represent a full ball aspect, an arrow aspect or another aspect. The LED lamp is adapted to be powered by an external power source and includes an input power circuit receiving an input voltage from the external power source. The input power circuit includes a power detection circuit that is adapted to determine a power state of the traffic LED lamp. The LED lamp further includes an LED load and a battery powered driving circuit. The battery power driving circuit drives the LED load if the power state of the LED lamp is in a power failure state.
    Type: Application
    Filed: August 17, 2009
    Publication date: February 18, 2010
    Inventors: MOHAMED CHERIF GHANEM, JOHN CHRISMAN, BENOIT ESSIAMBRE, CHRISTIAN POIRIER