Title:
METAL HALIDE LAMP AND ILLUMINATOR EMPLOYING IT
Document Type and Number:
WIPO Patent Application WO/2007/004663
Kind Code:
A1
Abstract:
A metal halide lamp comprises a translucent airtight vessel (1) having an arc tube
section (11) forming a discharge space (13) and sealing portions (121, 122) formed
at the both ends thereof, a discharge medium with which the discharge space is
filled, and a pair of electrodes (31, 32) projecting into the discharge space. The
discharge medium is composed of a metal halide and a rare gas and substantially containing
no mercury. The pair of electrodes are composed of tungsten containing thorium
oxide. Protrusions (311,321) are formed, respectively, on the pair of electrodes
and arc is formed between them when the metal halide lamp is operated.
Inventors:
WAJYATA TAKAYUKI (JP)
Application Number:
PCT/JP2006/313374
Publication Date:
January 11, 2007
Filing Date:
July 05, 2006
Export Citation:
Assignee:
HARISON TOSHIBA LIGHTING CORP (JP)
WAJYATA TAKAYUKI (JP)
WAJYATA TAKAYUKI (JP)
International Classes:
H01J61/06; H01J61/073
Foreign References:
| JP2005142138A | 2005-06-02 | |||
| EP1548798A2 | 2005-06-29 | |||
| JPH0668849A | 1994-03-11 |
Other References:
See also references of EP 1901333A4
Attorney, Agent or Firm:
AMAGI INTERNATIONAL PATENT LAW OFFICE (580 Horikawa-cho, Saiwai-k, Kawasaki-shi Kanagawa 13, JP)
Download PDF:
Previous Patent: MAGNETIC BEARING DEVICE AND MAGNETIC BEARING METHOD
Next Patent: PROCESS FOR RECOVERY OF METALS AND EQUIPMENT THEREFOR
Next Patent: PROCESS FOR RECOVERY OF METALS AND EQUIPMENT THEREFOR