Invention Grant
- Patent Title: Short arc type discharge lamp
- Patent Title (中): 短弧型放电灯
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Application No.: US13348301Application Date: 2012-01-11
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Publication No.: US08497632B2Publication Date: 2013-07-30
- Inventor: Tomoyoshi Arimoto , Akihiro Shimizu , Mitsuru Ikeuchi
- Applicant: Tomoyoshi Arimoto , Akihiro Shimizu , Mitsuru Ikeuchi
- Applicant Address: JP Tokyo
- Assignee: Ushio Denki Kabushiki Kaisha
- Current Assignee: Ushio Denki Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Rader, Fishman & Grauer PLLC
- Priority: JP2011-005412 20110114
- Main IPC: H01J61/04
- IPC: H01J61/04
Abstract:
A short arc type discharge lamp includes a cathode and an anode arranged inside an arc tube to face each other. The cathode comprises a main body portion made of tungsten and an emitter portion made of thoriated tungsten that is joined at the tip of the main body portion, where a metal oxide other than thorium (Th) is contained in the main body portion of the cathode, and a tungsten carbide layer is formed on the metal oxide.
Public/Granted literature
- US20120181925A1 SHORT ARC TYPE DISCHARGE LAMP Public/Granted day:2012-07-19
Information query
