US3125271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic pinch roller actuator
Assignee: —
•
Filing: —
•
Granted: 1964-03-17
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Expires: 1981-03-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:08
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/28; G11B15/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A TAPE HANDLER INCLUDING AN ELECTROMAGNETICALLY DRIVEN PINCH ROLLER, THE COMBINATION OF, AN ELECTROMAGNET INDUCTOR INCLUDING MEANS FOR CONNECTING A VOLTAGE SOURCE FOR PROVIDING CURRENT TO THE INDUCTOR FOR ACTUATING THE PINCH ROLLER, FIRST CONTROL MEANS CONNECTED WITH THE INDUCTOR TO INITIATE A FLOW OF CURRENT FOR ACTUATING THE PINCH ROLLER, AND SECOND CONTROL MEANS INCLUDING A DIFFERENTIATING CIRCUIT CONNECTED TO SUPPLY A SIGNAL IN RESPONSE TO AN INFLECTION IN THE VOLTAGE ACROSS THE INDUCTOR FOR MOMENTARILY MODIFYING THE CURRENT FLOW IN SAID INDUCTOR AFTER A PREDETERMINED INTERVAL, WHEREBY THE TENDENCY TO DEVELOP A CHANGE IN TAPE SPEED DUE TO ENGAGEMENT OF THE PINCH ROLLER IS REDUCED.
Claim 2
Dependent Claim
108 words
IN A TAPE HANDLER INCLUDING AN ELECTROMAGNETICALLY DRIVEN PINCH ROLLER, THE COMBINATION OF, AN ELECTROMAGNET INDUCTOR INCLUDING MEANS FOR CONNECTING A VOLTAGE SOURCE FOR PROVIDING CURRENT TO THE INDUCTOR FOR ACTUATING THE PINCH ROLLER, FIRST CONTROL MEANS CONNECTED WITH THE INDUCTOR TO INITIATE A FLOW OF CURRENT FOR ACTUATING THE PINCH ROLLER, AND SECOND CONTROL MEANS INCLUDING A DIFFERENTIATING CIRCUIT CONNECTED TO SUPPLY A SIGNAL IN RESPONSE TO AN INFLECTION IN THE VOLTAGE ACROSS THE INDUCTOR FOR MOMENTARILY MODIFYING THE CURRENT FLOW IN SAID INDUCTOR AFTER A PREDETERMINED INTERVAL, WHEREBY THE TENDENCY TO DEVELOP A CHANGE IN TAPE SPEED DUE TO ENGAGEMENT OF THE PINCH ROLLER IS REDUCED.
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) | 1967-03-17 | 1967-09-16 | 1968-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-17 | 1971-09-16 | 1972-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-17 | 1975-09-16 | 1976-03-17 | $7700.00 | Window Closed / Lapsed |