US3197645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loop sensing apparatus
Assignee: Ampex Corp
•
Filing: 1961-11-01
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Granted: 1965-07-27
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Expires: 1981-11-01
Abstract
No abstract record available.
Inventors
- 👤 John D Sperry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:32
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/342; G11; G11B; G11B15/00; G11B15/56; G11B15/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN A TAPE TRANSPORT, APPARATUS FOR SENSING THE LENGTH OF THE LOOP IN A TAPE STORAGE COLUMN, COMPRISING: (A) MEANS FOR PROVIDING A BEAM OF COLLIMATED LIGHT FROM A ZONE ON THE INTERIOR OF SAID COLUMN AND AT ONE END THEREOF, WITH SAID BEAM BEING DIRECTED ALONG A FIRST AXIS INCLINED TO A FIRST LONGITUDINAL WALL OF SAID COLUMN AND INCIDENT ON SAID WALL BETWEEN THE LIMITS OF EXCURSION OF SAID TAPE LOOP WHEN SAID TAPE LOOP IS AT THE MORE REMOTE LIMIT OF EXCURSION THEREOF; (B) A TRANSPARENT PANE MOUNTED IN SAID FIRST LONGITUDINAL WALL OF SAID COLUMN AND EXTENDING BETWEEN THE SAID LIMITS OF EXCURSION OF SAID TAPE LOOP; AND (C) A LIGHT-SENSITIVE PHOTOCELL MOUNTED AT ONE END OF SAID PLANE CORRESPONDING TO SAID ONE END OF SAID COLUMN FOR RECEIVING SAID LIGHT AND FOR PROVIDING A SIGNAL CORRESPONDING TO THE AMOUNT OF SAID LIGHT RECEIVED.
Claim 2
Dependent Claim
148 words
IN A TAPE TRANSPORT, APPARATUS FOR SENSING THE LENGTH OF THE LOOP IN A TAPE STORAGE COLUMN, COMPRISING: (A) MEANS FOR PROVIDING A BEAM OF COLLIMATED LIGHT FROM A ZONE ON THE INTERIOR OF SAID COLUMN AND AT ONE END THEREOF, WITH SAID BEAM BEING DIRECTED ALONG A FIRST AXIS INCLINED TO A FIRST LONGITUDINAL WALL OF SAID COLUMN AND INCIDENT ON SAID WALL BETWEEN THE LIMITS OF EXCURSION OF SAID TAPE LOOP WHEN SAID TAPE LOOP IS AT THE MORE REMOTE LIMIT OF EXCURSION THEREOF; (B) A TRANSPARENT PANE MOUNTED IN SAID FIRST LONGITUDINAL WALL OF SAID COLUMN AND EXTENDING BETWEEN THE SAID LIMITS OF EXCURSION OF SAID TAPE LOOP; AND (C) A LIGHT-SENSITIVE PHOTOCELL MOUNTED AT ONE END OF SAID PLANE CORRESPONDING TO SAID ONE END OF SAID COLUMN FOR RECEIVING SAID LIGHT AND FOR PROVIDING A SIGNAL CORRESPONDING TO THE AMOUNT OF SAID LIGHT RECEIVED.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |