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:
May. 14, 2002
Filed:
Mar. 23, 1999
Isaac L. Flory, IV, Blacksburg, VA (US);
Hubbell Incorporated, Orange, CT (US);
Abstract
An apparatus for providing auxiliary power to a lighting system for heavy equipment during interruptions of power from a 250 volt direct current (DC) power supply is provided. The DC power supply is the only power source available to discharge lamps provided on the heavy equipment. The energy storage banks are provided between the power supply and a ballast for operating a gas discharge lamp. The energy storage banks store energy and provide the reserved energy to the ballast when the supply voltage to the ballast decreases below a level necessary for sustaining operating of the discharge lamp. The energy storage banks can comprise capacitors arranged in various series and parallel circuits and a blocking rectifier to prevent non-lighting loads on the heavy equipment from draining the energy storage banks.