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:
Dec. 26, 1995
Filed:
Jun. 07, 1994
Gregory O Moberg, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A restart circuit for a dc arc lamp, which is subject to power variations that cause the lamp to extinguish, includes a power circuit for supplying the dc arc lamp with current that has a constant current value while the lamp is operating. A current monitor connected to the power circuit monitors the current supplied to the dc arc lamp and provides a current sense signal corresponding to the supplied current. A comparator, which is connected to receive the current sense signal, provides a restart signal having a hysteresis characteristic. The restart signal is activated when the current sense signal falls a first predetermined value below the constant current value (indicating that the lamp has extinguished) and deactivated when the current sense signal rises above a second predetermined value greater than said first predetermined value, but still less than the constant current value. An ignition circuit responsive to the restart signal then supplies the dc arc lamp with an ignition voltage to restart the lamp.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile