Patents by Inventor Harry W. Tulleners

Harry W. Tulleners 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 compensating electroluminescent lamp DC/AC inverter
    Patent number: 4319164
    Abstract: Described is a circuit to invert DC to AC for the operation of electroluminescent lamps. A primary winding of a transformer is in series with a power source and the input or output of the switching device. The output of the switching device is connected back to the power source. The secondary winding of the transformer is in series with an electroluminescent lamp and the controller side of the switching device. The secondary winding doubles as both the output to the electroluminescent lamp and the feedback winding to the controller side of the switching device. The electroluminescent lamp doubles both as the load and limiting impedance to the controller side of the switching device. Also described is a unique device for dimming the electroluminescent lamp.
    Type: Grant
    Filed: February 20, 1981
    Date of Patent: March 9, 1982
    Assignee: Midland-Ross Corporation
    Inventor: Harry W. Tulleners
  • Power factor compensating electroluminescent lamp DC/AC inverter
    Patent number: 4254362
    Abstract: This invention is a circuit to invert DC to AC for the operation of electroluminescent lamps. A primary winding of a transformer is in series with a power source and the input or output of the switching device. The output of the switching device is connected back to the power source. The secondary winding of the transformer is in series with an electroluminescent lamp and the controller side of the switching device. The secondary winding doubles as both the output to the electroluminescent lamp and the feedback winding to the controller side of the switching device. The electroluminescent lamp doubles both as the load and limiting impedance to the controller side of the switching device.
    Type: Grant
    Filed: July 30, 1979
    Date of Patent: March 3, 1981
    Assignee: Midland-Ross Corporation
    Inventor: Harry W. Tulleners