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:
Oct. 19, 1976
Filed:
Dec. 10, 1975
Applicant:
Inventor:
Theodore Wroblewski, Danvers, MA (US);
Assignee:
Frequency Technology, Inc., Littleton, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315278 ; 315239 ; 315282 ; 336165 ;
Abstract
A ballast circuit for providing constant power to a high intensity discharge lamp, the ballast including a transformer having two cores separated by a gap, one core being at least partially closed and the other, having an air gap. A primary coil winds around a portion of each core and secondary coils wind around another portion of each core. The secondary coils and a capacitor are in series with the lamp to regulate the current and voltage applied to the lamp.
Wroblewski, Theodore. (1976). Constant power lamp ballast (U.S. Patent No. 3987339). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3987339
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile