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. 14, 1994
Filed:
Jun. 14, 1991
Applicant:
Inventors:
Joe A Nuckolls, Blacksburg, VA (US);
Isaac L Flory, IV, Blacksburg, VA (US);
Assignee:
Hubbell Incorporated, Orange, CT (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315290 ; 315205 ; 315276 ; 315289 ; 315D / ;
Abstract
A hot restart circuit includes a storage capacitor and SCR connected across a tapped portion of a ballast with a breakdown device to start the SCR. A charging circuit for the storage capacitor includes a diode, pumping capacitor and choke in series from the ballast tap to the AC line and a further diode interconnecting the capacitors. The pumping capacitor increases the charge on the storage capacitor in a step-wise fashion until the breakdown voltage is reached, whereupon starting pulses are applied to the lamp.