Patents by Inventor Richard L. Sievers

Richard L. Sievers 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).

  • Automatic light dimmer for gas discharge lamps
    Patent number: 6329767
    Abstract: A power saving dimming apparatus for gas discharge lamps activates a system of gas discharge lamps through a phototransistor network sensitive to the infrared spectrum rather than the normal visible spectrum. The phototransistor network allows power to be supplied to the apparatus, resulting in the turning on of the lamps whenever daylight conditions exist which are insufficient to produce infrared light. When power is applied to the apparatus, either at initial turn on or after a momentary interruption, the apparatus applies full power to the primaries of the lamp ballasts for a preselected time period, thus ensuring all the lamps in the system light. After the preselected time period has passed, the apparatus automatically dims the lamps and maintains them in the dimmed state.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: December 11, 2001
    Inventor: Richard L. Sievers
  • Automatic light dimmer for gas discharge lamps
    Patent number: 6124684
    Abstract: A power saving dimming apparatus for gas discharge lamps activates a system of gas discharge lamps through a phototransistor network sensitive to the infrared spectrum rather than the normal visible spectrum. The phototransistor network allows power to be supplied to the apparatus, resulting in the turning on of the lamps whenever daylight conditions exist which are insufficient to produce infrared light. When power is applied to the apparatus, either at initial turn on or after a momentary interruption, the apparatus applies full power to the primaries of the lamp ballasts for a preselected time period, thus ensuring all the lamps in the system light. After the preselected time period has passed, the apparatus automatically dims the lamps and maintains them in the dimmed state.
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: September 26, 2000
    Inventor: Richard L. Sievers
  • Automatic light dimmer for gas discharge lamps
    Patent number: 4950963
    Abstract: A power saving dimming apparatus for gas discharge lamps is disclosed. The apparatus provides a means for applying full power to the lamp for a preselected time whenever the lamp is turned on. After the preselected time has passed, the lamp is maintained in an adjustable dimmed state.
    Type: Grant
    Filed: May 5, 1988
    Date of Patent: August 21, 1990
    Inventor: Richard L. Sievers