发明授权
- 专利标题： Waterproof type photographing apparatus and package for lens-fitted photo film unit
- 专利标题（中）： 防水型拍摄装置和镜头装相机胶卷装置
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申请号： US09770382申请日： 2001-01-29
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公开(公告)号： US06483991B2公开(公告)日： 2002-11-19
- 发明人: Keiji Uchiyama , Kenji Negishi , Yukito Suzuki
- 申请人： Keiji Uchiyama , Kenji Negishi , Yukito Suzuki
- 优先权： JP2000-025648 20000202
- 主分类号： G03B1708
- IPC分类号： G03B1708
摘要：
A tablet shaped catalyst is disposed on an upper portion inside a waterproof housing. The catalyst, which is comprised of palladium, accelerates a chemical reaction for combining hydrogen gas and oxygen gas. The catalyst begins accelerating the chemical reaction just after contacting with hydrogen gas. By disposing said catalyst on an upper position inside the waterproof housing, hydrogen gas, lighter than the air, is effectively removed. This chemical reaction causes to generate water, so it is preferable to provide a water absorbent by the catalyst.
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