US3343008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filament tension monitoring devices
Assignee: Allied Control Co Inc
•
Filing: 1964-10-12
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Granted: 1967-09-19
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Expires: 1984-10-12
Abstract
No abstract record available.
Inventors
- 👤 James E Bancroft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:04
CPC Classifications
B; B65; B65H; B65H63/00; B65H63/02; B65H63/024; B65H63/028; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
A DEVICE FOR MONITORING THE TENSION APPLIED TO A MOVING FILAMENT COMPRISING IN COMBINATION A LONGITUDINAL ARMATURE OF MAGNETIC MATERIAL MOUNTED FOR ROTATION ABOUT A MIDPOINT TRANSVERSE AXIS, A PAIR OF POLE PIECES OF MAGNETIC MATERIAL JUXTAPOSITIONED AT OPPOSITE ENDS OF SAID ARMATURE, SAID ARMATURE PROVIDING A LOW RELUCTANCE MAGNETIC FLUX PATH BETWEEN SAID POLE PIECES, A FILAMENT GUIDE ATTACHED TO SAID ARMATURE AND ADAPTED TO ROTATE THEREWITH, SAID FILAMENT GUIDE HAVING A PAIR OF SPACED TRUMPET-SHAPED EYELETS FOR DIRECTING SAID MONITORED FILAMENT ALONG AN AXIS SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF SAID ARMATURE, MEANS INCLUDING SAID FILAMENT GUIDE FOR APPLYING A SELECTABLE COMPONENT OF THE TENSION APPLIED TO SAID FILAMENT AS A COUNTERCLOCKWISE TORQUE TO SAID ARMATURE, MEANS FOR ESTABLISHING A MAGNETIC COUPLE OF SELECTABLE FORCE BETWEEN SAID ARMATURE AND SAID POLE PIECES TO RESIST SAID TORQUE, A FIRST CONTROL CIRCUIT, A SECOND CONTROL CIRCUIT, FIRST MEANS CONTROLLED BY SAID ARMATURE AND OPERATIVE WHEN THE FORCE OF SAID TORQUE EXCEEDS THE FORCE OF SAID MAGNETIC COUPLE BY A PREDETERMINED VALUE FOR ENERGIZING SAID FIRST CONTROL CIRCUIT, AND SECOND MEANS CONTROLLED BY SAID ARMATURE AND OPERATIVE WHEN THE FORCE OF SAID TORQUE FALLS BELOW THE FORCE OF SAID MAGNETIC COUPLE BY A PREDETERMINED VALUE FOR ENERGIZING SAID SECOND CONTROL CIRCUIT.
Claim 2
Independent Claim
211 words
A DEVICE FOR MONITORING THE TENSION APPLIED TO A MOVING FILAMENT COMPRISING IN COMBINATION A LONGITUDINAL ARMATURE OF MAGNETIC MATERIAL MOUNTED FOR ROTATION ABOUT A MIDPOINT TRANSVERSE AXIS, A PAIR OF POLE PIECES OF MAGNETIC MATERIAL JUXTAPOSITIONED AT OPPOSITE ENDS OF SAID ARMATURE, SAID ARMATURE PROVIDING A LOW RELUCTANCE MAGNETIC FLUX PATH BETWEEN SAID POLE PIECES, A FILAMENT GUIDE ATTACHED TO SAID ARMATURE AND ADAPTED TO ROTATE THEREWITH, SAID FILAMENT GUIDE HAVING A PAIR OF SPACED TRUMPET-SHAPED EYELETS FOR DIRECTING SAID MONITORED FILAMENT ALONG AN AXIS SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF SAID ARMATURE, MEANS INCLUDING SAID FILAMENT GUIDE FOR APPLYING A SELECTABLE COMPONENT OF THE TENSION APPLIED TO SAID FILAMENT AS A COUNTERCLOCKWISE TORQUE TO SAID ARMATURE, MEANS FOR ESTABLISHING A MAGNETIC COUPLE OF SELECTABLE FORCE BETWEEN SAID ARMATURE AND SAID POLE PIECES TO RESIST SAID TORQUE, A FIRST CONTROL CIRCUIT, A SECOND CONTROL CIRCUIT, FIRST MEANS CONTROLLED BY SAID ARMATURE AND OPERATIVE WHEN THE FORCE OF SAID TORQUE EXCEEDS THE FORCE OF SAID MAGNETIC COUPLE BY A PREDETERMINED VALUE FOR ENERGIZING SAID FIRST CONTROL CIRCUIT, AND SECOND MEANS CONTROLLED BY SAID ARMATURE AND OPERATIVE WHEN THE FORCE OF SAID TORQUE FALLS BELOW THE FORCE OF SAID MAGNETIC COUPLE BY A PREDETERMINED VALUE FOR ENERGIZING SAID SECOND CONTROL CIRCUIT.
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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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |