JPS54100726A - Location of microfilm - Google Patents
Location of microfilmInfo
- Publication number
- JPS54100726A JPS54100726A JP688478A JP688478A JPS54100726A JP S54100726 A JPS54100726 A JP S54100726A JP 688478 A JP688478 A JP 688478A JP 688478 A JP688478 A JP 688478A JP S54100726 A JPS54100726 A JP S54100726A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- microfilm
- offering
- signals
- detecting signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
PURPOSE: To accomplish reliable location control merely through addition detecting signals to an offering line by impressing the offering signals, which accord to the rise and break of the mark detecting signals of microfilm, upon a computer.
CONSTITUTION: Optically detecting signals of the mark b of microfilm F are impressed at one hand upon a differentiation circuit 10 through an AND circuit 6 and an OR circuit 9 and at the other upon the circuit through an inverting circuit 7, an AND circuit 8 and the OR circuit 9. In accordance with the differential outputs of the same polarity of the circuit 10, the inconductions of the circuits 6 and 8 are controlled through a trigger type FF 12. The differential output is impressed as offering signals upon a computer 11. Thus, the computer accomplishes the location, while control words being at a high level, in response to the first differential output, and interrupts the counting operation, while the control words being at a low level, in response to the second differential output. Thus, it is possible to accomplish the reliable location control of the microfilm merely by impressing the detecting signals upon a single offering line.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP688478A JPS54100726A (en) | 1978-01-25 | 1978-01-25 | Location of microfilm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP688478A JPS54100726A (en) | 1978-01-25 | 1978-01-25 | Location of microfilm |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54100726A true JPS54100726A (en) | 1979-08-08 |
Family
ID=11650651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP688478A Pending JPS54100726A (en) | 1978-01-25 | 1978-01-25 | Location of microfilm |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54100726A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4953442A (en) * | 1972-09-22 | 1974-05-24 |
-
1978
- 1978-01-25 JP JP688478A patent/JPS54100726A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4953442A (en) * | 1972-09-22 | 1974-05-24 |
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