The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2003
Filed:
Jul. 25, 2002
James Hudson, Wauconda, IL (US);
Thomas J. Mayer, Wauconda, IL (US);
Varon Lighting, Inc., Elmhurst, IL (US);
Abstract
The instant invention relates to a solid state low voltage power supply controller which reduces a conventional 120 volt AC power source to 12 volt pulsating DC for the purpose of operating a single “point of use” light source wherein the low voltage power supply is in proximate location to the light source. A pulse width modulator integrated circuit operating in conjunction with a field effect transistor induces energy in the secondary of a step-down transformer to provide a reduced pulsating DC current to a lamp load. A feedback voltage from the secondary winding of the stepdown transformer operates to set the gain of internal circuitry of the integrated circuitry to provide a predetermined constant pulsating DC voltage and a predetermined limited range of power wattage. A feedback voltage operates to reduce current drawn by overcurrent demands on the primary of the transformer.