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. 19, 1991
Filed:
Apr. 10, 1989
Applicant:
Inventors:
Larry J Costa, Danville, IL (US);
Dail L Swanson, Danville, IL (US);
Assignee:
Valmont Industries, Inc., Valley, NE (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315278 ; 315276 ; 336170 ; 336 90 ;
Abstract
In one form of the multiple voltage ballast system described herein, each of the primary coils has different wire sizes with the largest diameter wire being utilized in the 120 V primary coil. In another form of the invention, a pair of 120 V primary coils are connected in series with a 37 V primary coil so that the ballast may function as a 277 V ballast. The primary coils are also electrically connected so that the ballast may be used as a 120 V ballast.