发明名称 |
Microfilm index display mechanism - is used for finding particular microfilm frames quickly and operates by displaying addresses during film winding |
摘要 |
<p>A mechanism for winding a microfilm through a projector simultaneously displays frame addresses in a readable form. The microfilm (10) is wound from one spool (12) on to another (14) through a projector unit (16) which contains a light source (30) mirror (26) lens unit (32) and screen (40). At one edge of the film are a series of marks (46) one for each frame, whilst at the opposite edge a series of address codes (44) are printed. The marks (46) are used as a clocking track, detected by means of a light source (56) sensor (48) and pulse shaping network which drives a discharge lamp (28) in such a way that an image of the current address word is thrown on to the screen (40).</p> |
申请公布号 |
DE2532556(A1) |
申请公布日期 |
1977.02.10 |
申请号 |
DE19752532556 |
申请日期 |
1975.07.21 |
申请人 |
GENERAL COMPUTING CORP. |
发明人 |
KAUFMAN,BURTON;HOWARD SCHNEIDER,BRUCE |
分类号 |
G03B21/11;G06K17/00;(IPC1-7):G06K7/14;G03B23/02 |
主分类号 |
G03B21/11 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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