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:
Jun. 13, 1978
Filed:
Mar. 24, 1977
Applicant:
Inventor:
Fredrick W Paget, Rockport, MA (US);
Assignee:
GTE Sylvania Incorporated, Danvers, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324 / ;
Abstract
A ballast tester contains a DC detector, a peak voltage detector and a third harmonic detector. The DC detector determines if the ballast being tested can produce a steady DC current and is, therefore, a lag ballast. The peak voltage detector can identify the ballast as a lead ballast, while the third harmonic detector can determine if a lead ballast contains a starting capacitor.