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:
Sep. 23, 2014
Filed:
Jul. 03, 2013
Ushio Denki Kabushiki Kaisha, Tokyo, JP;
Masaki Kato, Himeji, JP;
Yukio Yasuda, Himeji, JP;
Ushio Denki Kabushiki Kaisha, Chiyoda-Ku, Tokyo, JP;
Abstract
A short arc type mercury lamp structure has Hg and a rare gas which are enclosed inside a light-emitting tube. Kr is enclosed as the rare gas. It is possible to realize the initial intensity of radiation at the same level as in the case in which Ar is enclosed and prevent a sudden decrease in the intensity of radiation when the lamp is lighted for a long time. The longevity of the lamp is greatly increased than that of a lamp in which Ar is enclosed. The anode satisfies the formula:1−/(×tan θ)≧0.66,where r (mm) is the radius of the leading end surface of the anode, θ(°) is the angle between the electrode axis and the taper surface in the axial cross-section of the anode, and d(mm) is the inter-electrode distance.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile