US3072361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tension controlling device
Assignee: Ronson Corp
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Filing: 1961-09-05
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Granted: 1963-01-08
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Expires: 1981-09-05
Abstract
No abstract record available.
Inventors
- 👤 Richard E Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:30
CPC Classifications
B; B65; B65H; B65H59/00; B65H59/10; B65H59/16; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
225 words
A DEVICE FOR PRODUCING AND MAINTAINING DESIRED TENSION IN A RUNNING STRAND OF MATERIAL COMPRISING A PULLEY MEMBER, A DISC MEMBER HAVING AT LEAST A PORTION FORMED OF AN ELECTRICALLY CONDUCTIVE NON-MAGNETIC MATERIAL, MEANS MOUNTING SAID PULLEY AND DISC MEMBERS FOR UNITARY ROTATIVE MOVEMENT, SAID STRAND BEING ADAPTED TO PASS ABOUT SAID PULLEY MEMBER AND THEREBY ROTATE SAID PULLEY AND DISC MEMBERS, A PAIR OF MAGNETS POSITIONED ON OPPOSITE SIDES OF SAID DISC MEMBER IN OPPOSED SPACED RELATION TO EACH OTHER AND TO SAID DISC MEMBER, SAID MAGNETS GENERATING A MAGNETIC FIELD THEREBETWEEN OF CONSTANT FORCE DURING OPERATION OF THE DEVICE FOR EXERTING A DRAG UPON SAID DISC MEMBER OPPOSING ROTATION THEREOF, MEANS MOUNTING SAID MAGNETS FOR UNITARY MOVEMENT RELATIVE TO SAID DISC MEMBER TO VARY THE DISTANCE THEREOF FROM THE AXIS OF ROTATION OF SAID DISC MEMBER AND THEREBY VARY THE DRAG TORQUE THEREUPON, SENSING MEANS ENGAGING THE STRAND PASSING FROM SAID PULLEY MEMBER FOR DETECTING VARIATIONS IN THE TENSION THEREOF, AND MEANS INTERCONNECTING SAID MAGNET MOUNTING MEANS AND SAID SENSING MEANS FOR MOVING SAID MAGNETS TOWARD THE AXIS OF ROTATION OF SAID DISC MEMBER UPON A DETECTED INCREASE IN THE TENSION OF SAID STRAND BY SAID SENSING MEANS AND AWAY FROM THE AXIS OF ROTATION OF SAID DISC MEMBER UPON A DETECTED DECREASE IN THE TENSION OF SAID STRAND BY SAID SENSING MEANS.
Claim 2
Independent Claim
225 words
A DEVICE FOR PRODUCING AND MAINTAINING DESIRED TENSION IN A RUNNING STRAND OF MATERIAL COMPRISING A PULLEY MEMBER, A DISC MEMBER HAVING AT LEAST A PORTION FORMED OF AN ELECTRICALLY CONDUCTIVE NON-MAGNETIC MATERIAL, MEANS MOUNTING SAID PULLEY AND DISC MEMBERS FOR UNITARY ROTATIVE MOVEMENT, SAID STRAND BEING ADAPTED TO PASS ABOUT SAID PULLEY MEMBER AND THEREBY ROTATE SAID PULLEY AND DISC MEMBERS, A PAIR OF MAGNETS POSITIONED ON OPPOSITE SIDES OF SAID DISC MEMBER IN OPPOSED SPACED RELATION TO EACH OTHER AND TO SAID DISC MEMBER, SAID MAGNETS GENERATING A MAGNETIC FIELD THEREBETWEEN OF CONSTANT FORCE DURING OPERATION OF THE DEVICE FOR EXERTING A DRAG UPON SAID DISC MEMBER OPPOSING ROTATION THEREOF, MEANS MOUNTING SAID MAGNETS FOR UNITARY MOVEMENT RELATIVE TO SAID DISC MEMBER TO VARY THE DISTANCE THEREOF FROM THE AXIS OF ROTATION OF SAID DISC MEMBER AND THEREBY VARY THE DRAG TORQUE THEREUPON, SENSING MEANS ENGAGING THE STRAND PASSING FROM SAID PULLEY MEMBER FOR DETECTING VARIATIONS IN THE TENSION THEREOF, AND MEANS INTERCONNECTING SAID MAGNET MOUNTING MEANS AND SAID SENSING MEANS FOR MOVING SAID MAGNETS TOWARD THE AXIS OF ROTATION OF SAID DISC MEMBER UPON A DETECTED INCREASE IN THE TENSION OF SAID STRAND BY SAID SENSING MEANS AND AWAY FROM THE AXIS OF ROTATION OF SAID DISC MEMBER UPON A DETECTED DECREASE IN THE TENSION OF SAID STRAND BY SAID SENSING MEANS.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |