US3299272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive system for taking out desired portions of records on microfilm
Assignee: Ricoh Co Ltd
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Filing: 1964-02-06
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Granted: 1967-01-17
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Expires: 1984-02-06
Abstract
No abstract record available.
Inventors
- 👤 Furukawa Yozo
- 👤 Satomi Toyokazu
- 👤 Hariu Hajime
- 👤 Takei Shuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:46
CPC Classifications
—
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
206 words
A SYSTEM FOR SELECTING DESIRED PORTIONS OF RECORDS ON A MICROFILM HAVING THEREON SUCH RECORDS AS WELL AS AREAS THAT IDENTIFY RESPECTIVE PORTIONS OF RECORDS, COMPRISING A LIGHT SOURCE, AND A PAIR OF PHOTOELECTRIC TRANSDUCING ELEMENTS DISPOSED FOR RECEIVING LIGHT FROM SAID LIGHT SOURCE, SAID MICROFILM BEING ADAPTED TO TRAVEL EITHER IN FORWARD DIRECTION OR IN REVERSE DIRECTION WITH SAID IDENTIFYING AREAS PASSING BETWEEN SAID LIGHT SOURCE AND SAID PAIR OF PHOTOELECTRIC TRANSDUCING ELEMENTS WHICH ARE DISPOSED SIDE-BY-SIDE IN THE DIRECTION OF TRAVEL OF SAID MICROFILM, EACH OF THE PRJECTIONS OF SAID IDENTIFYING AREAS ONTO SAID PHOTOELECTRIC TRANSDUCING ELEMENTS HAVING A LENGTH LONGER THAN THE DISTANCE BETWEEN SAID PHOTOELECTRIC TRANSDUCING ELEMENTS, GATE CIRCUITS FOR RECEIVING ELECTRIC SIGNALS PRODUCED BY SAID PAIR OF PHOTOELECTRIC TRANSDUCING ELEMENTS AS SAID MICROFILM TRAVELS, A COUNTING CIRCUIT AND AN ADDITION-SUBSTRACTION CONTROL CIRCUIT FOR RECEIVING SIGNALS FROM SAID GATE CIRCUITS, SAID GATE CIRCUITS BEING SELECTIVELY OPENED AND CLOSED IN ACCORDANCE WITH TIME SHIFT BETWEEN LIGHT SIGNALS ENTERING INTO SAID PAIR OF PHOTOELECTRIC TRANSDUCING ELEMENTS THROUGH SAID IDENTIFYING AREAS, ONE OF SAID PHOTOELECTRIC TRANSDUCING ELEMENTS SERVING FOR INDICATING THE DIRECTION OF TRAVEL OF SAID MICROFILM TO SWITCH OVER SAID ADDITION-SUBSTRACTION CONTROL CIRCUIT, WHILE THE OTHER OF SAID PHOTOELECTRIC TRANSDUCING ELEMENTS SERVES FOR COUNTING.
Claim 2
Independent Claim
206 words
A SYSTEM FOR SELECTING DESIRED PORTIONS OF RECORDS ON A MICROFILM HAVING THEREON SUCH RECORDS AS WELL AS AREAS THAT IDENTIFY RESPECTIVE PORTIONS OF RECORDS, COMPRISING A LIGHT SOURCE, AND A PAIR OF PHOTOELECTRIC TRANSDUCING ELEMENTS DISPOSED FOR RECEIVING LIGHT FROM SAID LIGHT SOURCE, SAID MICROFILM BEING ADAPTED TO TRAVEL EITHER IN FORWARD DIRECTION OR IN REVERSE DIRECTION WITH SAID IDENTIFYING AREAS PASSING BETWEEN SAID LIGHT SOURCE AND SAID PAIR OF PHOTOELECTRIC TRANSDUCING ELEMENTS WHICH ARE DISPOSED SIDE-BY-SIDE IN THE DIRECTION OF TRAVEL OF SAID MICROFILM, EACH OF THE PRJECTIONS OF SAID IDENTIFYING AREAS ONTO SAID PHOTOELECTRIC TRANSDUCING ELEMENTS HAVING A LENGTH LONGER THAN THE DISTANCE BETWEEN SAID PHOTOELECTRIC TRANSDUCING ELEMENTS, GATE CIRCUITS FOR RECEIVING ELECTRIC SIGNALS PRODUCED BY SAID PAIR OF PHOTOELECTRIC TRANSDUCING ELEMENTS AS SAID MICROFILM TRAVELS, A COUNTING CIRCUIT AND AN ADDITION-SUBSTRACTION CONTROL CIRCUIT FOR RECEIVING SIGNALS FROM SAID GATE CIRCUITS, SAID GATE CIRCUITS BEING SELECTIVELY OPENED AND CLOSED IN ACCORDANCE WITH TIME SHIFT BETWEEN LIGHT SIGNALS ENTERING INTO SAID PAIR OF PHOTOELECTRIC TRANSDUCING ELEMENTS THROUGH SAID IDENTIFYING AREAS, ONE OF SAID PHOTOELECTRIC TRANSDUCING ELEMENTS SERVING FOR INDICATING THE DIRECTION OF TRAVEL OF SAID MICROFILM TO SWITCH OVER SAID ADDITION-SUBSTRACTION CONTROL CIRCUIT, WHILE THE OTHER OF SAID PHOTOELECTRIC TRANSDUCING ELEMENTS SERVES FOR COUNTING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |