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:
Mar. 04, 1986
Filed:
Jan. 12, 1984
Applicant:
Inventor:
Ira J Pitel, Morristown, NJ (US);
Assignee:
HID Systems, Inc., Sparta, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ; H05B / ;
U.S. Cl.
CPC ...
315307 ; 315311 ; 315 54 ; 315284 ; 323258 ;
Abstract
A lag ballast for a high intensity discharge lamp includes a transformer providing voltage at either of two levels. Triacs tied to the transformer supply current at the desired voltage level through either of two inductances. The triacs are controlled by a comparison circuit so that a low voltage and high current are supplied to the lamp during startup and a lower current and higher voltage are supplied as the lamp approaches its normal operating temperature.