US3237439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tension control system
Assignee: General Dynamics Corp
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Filing: 1963-12-13
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Granted: 1966-03-01
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Expires: 1983-12-13
Abstract
No abstract record available.
Inventors
- 👤 James H Torrance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:26
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/48; B21B37/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
AN AUTOMATIC TENSION CONTROL SYSTEM FOR MAINTAINING A PREDETERMINED TENSION ON A STRIP OF MATERIAL BETWEEN THE ROOL STANDS OF A TANDEM ROLLING MILL COMPRISING A TENSION ROLLER POSITIONED BETWEEN SAID ROLL STANDS, MEANS TO MOUNT SAID TENSION ROLLER FOR BIDIRECTIONAL MOVEMENT IN A PATH INTERSECTING THE STRAIGHT LINE PATH OF MOVEMENT OF SAID STRIP MATERIAL BETWEEN SAID ROLL STANDS, AN HYDRAULIC ACTUATOR MECHANICALLY CONNECTED TO AND CONTROLLING THE POSITION OF THE TENSION ROLLER, CONTROL VALVE MEANS CONNECTED WITH THE ACTUATOR TO DETERMINE BOTH A NULL POSITION FOR THE ACTUATOR AND THE DIRECTION OF MOTION OF SAID ACTUATOR FROM THE NULL POSITION, DIFFERENTIAL PRESSURE TRANSDUCING MEANS CONNECTED WITH SAID ACTUATOR, CONTROL CIRCU IT MEANS FOR SAID CONTROL VALVE, MEANS TO INTRODUCE A PREDETERMINED INPUT ELECTRICAL SIGNAL INTO SAID CONTROL CIRCUIT MEANS TO ACTUATE THE VALVE AND MOVE SAID ACTUATOR AND THE TENSION ROLL TO A PLACE A DESIRED TENSION ON THE STRIP, MEANS IN SAID CONTROL CIRCUIT MECHANICALLY CONNECTED WITH THE ACTUATOR TO BALANCE OUT THE PREDETERMINED SIGNAL WHEN SAID ACTUATOR HAS MOVED PROPORTIONATELY TO SAID INPUT SIGNAL, CIRCUIT MEANS INTERCONNECTING THE PRESSURE TRANSDUCER MEANS WITH THE CONTROL CIRCUIT MEANS WHEREBY TO INSTANTLY TRANSMIT SIGNALS INDICATING DEVIATIONS IN STRIP TENSION THROUGH SAID CONTROL CIR-
Claim 2
Dependent Claim
204 words
AN AUTOMATIC TENSION CONTROL SYSTEM FOR MAINTAINING A PREDETERMINED TENSION ON A STRIP OF MATERIAL BETWEEN THE ROOL STANDS OF A TANDEM ROLLING MILL COMPRISING A TENSION ROLLER POSITIONED BETWEEN SAID ROLL STANDS, MEANS TO MOUNT SAID TENSION ROLLER FOR BIDIRECTIONAL MOVEMENT IN A PATH INTERSECTING THE STRAIGHT LINE PATH OF MOVEMENT OF SAID STRIP MATERIAL BETWEEN SAID ROLL STANDS, AN HYDRAULIC ACTUATOR MECHANICALLY CONNECTED TO AND CONTROLLING THE POSITION OF THE TENSION ROLLER, CONTROL VALVE MEANS CONNECTED WITH THE ACTUATOR TO DETERMINE BOTH A NULL POSITION FOR THE ACTUATOR AND THE DIRECTION OF MOTION OF SAID ACTUATOR FROM THE NULL POSITION, DIFFERENTIAL PRESSURE TRANSDUCING MEANS CONNECTED WITH SAID ACTUATOR, CONTROL CIRCU IT MEANS FOR SAID CONTROL VALVE, MEANS TO INTRODUCE A PREDETERMINED INPUT ELECTRICAL SIGNAL INTO SAID CONTROL CIRCUIT MEANS TO ACTUATE THE VALVE AND MOVE SAID ACTUATOR AND THE TENSION ROLL TO A PLACE A DESIRED TENSION ON THE STRIP, MEANS IN SAID CONTROL CIRCUIT MECHANICALLY CONNECTED WITH THE ACTUATOR TO BALANCE OUT THE PREDETERMINED SIGNAL WHEN SAID ACTUATOR HAS MOVED PROPORTIONATELY TO SAID INPUT SIGNAL, CIRCUIT MEANS INTERCONNECTING THE PRESSURE TRANSDUCER MEANS WITH THE CONTROL CIRCUIT MEANS WHEREBY TO INSTANTLY TRANSMIT SIGNALS INDICATING DEVIATIONS IN STRIP TENSION THROUGH SAID CONTROL CIR-
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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |