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. 29, 2009
Filed:
Jul. 16, 2007
Yoichi Mizukawa, Himeji, JP;
Tetsuya Kitagawa, Himeji, JP;
Shinji Suzuki, Himeji, JP;
Ushiodenki Kabushiki Kaisha, Tokyo, JP;
Abstract
A filament lamp that allows independent control of the state of luminescence of multiple filaments and that reliably prevents the occurrence of unwanted discharge between adjacent portions of neighboring filaments, even when a high voltage is injected into the filaments to achieve a desired irradiation distribution, and light-irradiation-type heat treatment device that can heat the article to be treated uniformly. The filament lamp has multiple filament assemblies, each having a filament and respective leads arrangement sequentially within a light emitting bulb, in the axial direction of the light emitting bulb. With alternating current power supplied to each filament independently, the current will be supplied with the same phase and mutually adjacent terminals of neighboring filament assemblies will have the same potential, and with direct current power supplied to each filament independently, adjacent terminals of neighboring filament assemblies will be of the same polarity. The light-irradiation-type heat treatment device uses multiple filament lamps of this type.