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. 24, 2002
Filed:
Jun. 14, 2000
Koito Manufacturing Co., Ltd., Tokyo, JP;
Abstract
The amount of a metal halide to be enclosed in a generally ellipsoidal discharge space within a discharge vessel is set in the range 0.006-0.01 mg per unit volume (&mgr;l) of the discharge space . If the amount is less than 0.01 mg/&mgr;l, the deposit of metal halide on the inner surface of the discharge space in its lowest position midway between the narrow end portions thereof will not cause “shunting” of the arc between the electrodes A, B. As a result, the arc is effectively prevented from fizzling out after the metal halide lamp is switched on. To ensure that the metal halide lamp produces the intended luminous flux and color of light, the amount of the metal halide to be enclosed in the discharge space should not be lower than 0.006 mg/&mgr;l.