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:
Aug. 11, 1987
Filed:
Jun. 18, 1986
Applicant:
Inventors:
Donald S Kuhnel, Houston, TX (US);
Sidney A Ottenstein, Spring, TX (US);
Assignee:
Innovative Controls, Incorporated, Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
G05F / ; H05B / ; H05B / ; H05B / ;
U.S. Cl.
CPC ...
315307 ; 315291 ; 315309 ; 315158 ; 315151 ; 323277 ;
Abstract
The invention comprises a self-adjusting ballast system for a high intensity discharge lamp. The ballast has a current limiter which modifies the lamp's present duty cycle to prevent damage if bulb rectification or another overcurrent condition occurs. It also has a current integration feedback loop for controlling lamp current during start-up.