Patents by Inventor Kerry G. Evans

Kerry G. Evans 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).

  • Emergency lighting circuits
    Patent number: 4686424
    Abstract: An emergency lighting circuit includes a lamp which can be energized by a battery-inverter circuit upon power failure. The battery is connected to the inverter circuit and the lamp by operation of a relay which is connected to the rectifier supplying charging current to the battery. The rectifier is connected across the line in series with a ballast reactor. The circuit can be used as emergency lighting only or the lamp can be employed for normal lighting purposes and switched to the inverter power when line voltage is interrupted.
    Type: Grant
    Filed: January 21, 1986
    Date of Patent: August 11, 1987
    Assignee: Harvey Hubbell Incorporated
    Inventors: Joe A. Nuckolls, Kerry G. Evans