Patent US3216637A successfully refreshed from Google Patents.
US3216637A
Expired / Lapsed
US
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Device for automatically controlling the feeding of a magnetic tape
Assignee: IFP Energies nouvelles
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Filing: 1963-04-01
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Granted: 1965-11-09
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Expires: 1983-04-01
Abstract
No abstract record available.
Inventors
- 👤 Cholet Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:15
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/24; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/28; G11B15/29; G11B15/295; G11B15/34; G11B15/43; G11B15/46; G11B15/52; G11B15/56; G11B15/60; G11B15/602; G11B15/61; G11B27/00; G11B27/10; G11B27/19; G11B27/24; G11B27/26; G11B27/28; G11B2220/00; G11B2220/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A DEVICE FOR HIGH SPEED FEEDING OF A WIDE MAGNETIC GAPE BETWEEN TWO DRIVING SPROCKETS AND COMPRISING A FIRST ELECTRIC MOTOR OPERATIVELY CONNECTED TO THE TWO SPROCKETS FOR ROTATING THEM IN SYNCHRONISM, AN OSCILLATOR CONNECTED TO THE MOTOR FOR KEEPING IT AT CONSTANT SPEED, A FREELY ROTATABLE CYLINDRICAL DRUM AGAINST THE PERIPHERY OF WHICH A LOOP OF THE TAPE WHICH IS BETWEEN THE TWO SPROCKETS IS PRESSED, MEANS INCLUDING A ROLLER FOR PRESSING ONE END OF THE LOOP AGAINST THE DRUM, A VARIABLE SPEED MOTOR FOR DRIVING THE ROLLER, ANOTHER ROLLER FOR PRESSING THE TAPE AT THE OTHER END OF THE LOOP AGAINST THE DRUM, AND AN ADJUSTABLE BRAKE FOR CONTROLLING THE SPEED OF ROTATION OF SAID OTHER ROLLER.
Claim 2
Independent Claim
119 words
A DEVICE FOR HIGH SPEED FEEDING OF A WIDE MAGNETIC GAPE BETWEEN TWO DRIVING SPROCKETS AND COMPRISING A FIRST ELECTRIC MOTOR OPERATIVELY CONNECTED TO THE TWO SPROCKETS FOR ROTATING THEM IN SYNCHRONISM, AN OSCILLATOR CONNECTED TO THE MOTOR FOR KEEPING IT AT CONSTANT SPEED, A FREELY ROTATABLE CYLINDRICAL DRUM AGAINST THE PERIPHERY OF WHICH A LOOP OF THE TAPE WHICH IS BETWEEN THE TWO SPROCKETS IS PRESSED, MEANS INCLUDING A ROLLER FOR PRESSING ONE END OF THE LOOP AGAINST THE DRUM, A VARIABLE SPEED MOTOR FOR DRIVING THE ROLLER, ANOTHER ROLLER FOR PRESSING THE TAPE AT THE OTHER END OF THE LOOP AGAINST THE DRUM, AND AN ADJUSTABLE BRAKE FOR CONTROLLING THE SPEED OF ROTATION OF SAID OTHER ROLLER.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |