Harry W Tulleners

US Patent:

43191649, Mar 9, 1982

Filed:

Feb 20, 1981

Appl. No.:

6/236368

Inventors:

Harry W. Tulleners - Urbana OH

Assignee:

Midland-Ross Corporation - Cleveland OH

International Classification:

H05B 3702
H05B 3904
H05B 4136

US Classification:

315219

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.

US Patent:

42543622, Mar 3, 1981

Filed:

Jul 30, 1979

Appl. No.:

6/061929

Inventors:

Harry W. Tulleners - Urbana OH

Assignee:

Midland-Ross Corporation - Cleveland OH

International Classification:

H05B 3702
H05B 3904
H05B 4136

US Classification:

315219

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.