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发明名称
暗室定时器
摘要
暗室定时器是一种用于摄影暗室冲洗胶卷,印相或放大曝光的简易定时装置。配合普通印相机、放大机能使印相、放大按预置时间自动曝光,可在冲洗胶卷时按预置时间发出信号。本装置由电阻、电容组成定时电路,大功率开关集成电路作为直流无触点开关,双向可控硅作为交流无触点开关。本装置是一种广大摄影爱好者向往的、而又可以接受的简易的定时装置。
申请公布号
CN2041082U
申请公布日期
1989.07.12
申请号
CN88212922.8
申请日期
1988.05.14
申请人
杜政华
发明人
杜政华
分类号
H03K17/28;G03D17/00
主分类号
H03K17/28
代理机构
代理人
主权项
1、一种暗室定时器,其特征是由电阻、电容组成定时电路;由交流无触点开关和直流无触点开关组成执行电路。
地址
四川省攀枝花市攀矿动力厂科技科
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