Invention Grant
- Patent Title: Short arc type discharge lamp
- Patent Title (中): 短弧型放电灯
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Application No.: US13245028Application Date: 2011-09-26
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Publication No.: US08400060B2Publication Date: 2013-03-19
- Inventor: Tomoyoshi Arimoto , Mitsuru Ikeuchi , Akihiro Shimizu
- Applicant: Tomoyoshi Arimoto , Mitsuru Ikeuchi , Akihiro Shimizu
- Applicant Address: JP Tokyo
- Assignee: Ushio Denki Kabushiki Kaisha
- Current Assignee: Ushio Denki Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Roberts Mlotkowski Safran & Cole, P.C.
- Agent David S. Safran
- Priority: JP2010-223930 20101001
- Main IPC: H01J17/04
- IPC: H01J17/04
Abstract:
A short arc type discharge lamp wherein a cathode and an anode are arranged opposite to each other in an interior of a light emitting tube and said cathode consists of a main body part with tungsten as the main constituent and an emitter part comprised of thoriated tungsten, wherein an oxygen content of the main body part of said cathode is lower than that of the emitter part, and band-shaped tungsten carbide is formed at the tip end face of the emitter part of said cathode.
Public/Granted literature
- US20120081002A1 SHORT ARC TYPE DISCHARGE LAMP Public/Granted day:2012-04-05
Information query
