发明授权
- 专利标题： Card selector device
- 专利标题（中）： 卡选择器
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申请号： US894763申请日： 1978-04-10
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公开(公告)号： US4223212A公开(公告)日： 1980-09-16
- 发明人: David L. Smith , John M. Jamieson
- 申请人： David L. Smith , John M. Jamieson
- 申请人地址： GA Atlanta
- 专利权人： Computer Microfilm International Corporation
- 当前专利权人： Computer Microfilm International Corporation
- 当前专利权人地址： GA Atlanta
- 主分类号： G06K17/00
- IPC分类号： G06K17/00 ; H04N1/00 ; H04N1/047 ; H04N1/10 ; H04N1/387 ; H04N1/40 ; H04N7/18 ; G06F7/38
摘要：
A film card selection device for use in an automatic microfilm display apparatus is provided with a switch for sensing that a film card has been selected. A counter counts the number of drive gear teeth passing a selected point after selection of a film card so that the apparatus can be stopped with the selected card in position for retrieval.
公开/授权文献
- US6104738A Semiconductor laser and process for producing the same 公开/授权日：2000-08-15
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