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US3139216A
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Automatic control of the flow of bulk materials on conveyors
Assignee: Trans-Weigh Co
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Filing: 1961-07-31
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Granted: 1964-06-30
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Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Mell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:26
CPC Classifications
G; G01; G01G; G01G11/00; G01G11/04; G01G11/043; G01G11/08; G01G11/083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
IN A SYSTEM FOR CONTINUOUSLY FEEDING MATERIAL FROM A FEEDER TO A CONTINUOUSLY TRAVELING CONVEYOR, THE IMPROVEMENT OF MEANS FOR CONTROLLING THE WEIGHT OF MATERIAL ON THE CONVEYOR UNIFORMLY IN ACCORDANCE WITH A PREDETERMINED WEIGHT COMPRISING FIRST MEASURING MEANS RESPONSIVE TO THE WEIGHT OF THE MATERIAL ON A SECTION OF THE CONVEYOR CLOSE TO THE FEED END, SECOND MEASURING MEANS RESPONSIVE TO THE SPEED OF THE CONVEYOR, CONTROL MEANS PRODUCING A CONTINUOUS OUTPUT PROPORTIONAL TO THE ERROR IN WEIGHT IMMEDIATELY OPERATIVE TO ADJUST THE FEEDER OUTPUT IN A CORRECTIVE DIRECTION AND IN AN AMOUNT PROPORTIONAL TO WEIGHT ERROR TO OBTAIN THE PREDETERMINED WEIGHT OF MATERIAL, AND COMPENSATING MEANS EFFECTIVE ON SAID CONTROL MEANS AND RESPONSIVE TO BOTH OF SAID MEASURING MEANS TO VARY THE RATE OF FEEDER CORRECTION IN PROPORTION TO CONVEYOR SPEED, SO THAT THE RATE OF FEEDER CORRECTION IS INVERSELY PROPORTIONAL TO THE TIME LAG BETWEEN THE FEEDER AND SAID FIRST MEASURING MEANS.
Claim 2
Dependent Claim
155 words
IN A SYSTEM FOR CONTINUOUSLY FEEDING MATERIAL FROM A FEEDER TO A CONTINUOUSLY TRAVELING CONVEYOR, THE IMPROVEMENT OF MEANS FOR CONTROLLING THE WEIGHT OF MATERIAL ON THE CONVEYOR UNIFORMLY IN ACCORDANCE WITH A PREDETERMINED WEIGHT COMPRISING FIRST MEASURING MEANS RESPONSIVE TO THE WEIGHT OF THE MATERIAL ON A SECTION OF THE CONVEYOR CLOSE TO THE FEED END, SECOND MEASURING MEANS RESPONSIVE TO THE SPEED OF THE CONVEYOR, CONTROL MEANS PRODUCING A CONTINUOUS OUTPUT PROPORTIONAL TO THE ERROR IN WEIGHT IMMEDIATELY OPERATIVE TO ADJUST THE FEEDER OUTPUT IN A CORRECTIVE DIRECTION AND IN AN AMOUNT PROPORTIONAL TO WEIGHT ERROR TO OBTAIN THE PREDETERMINED WEIGHT OF MATERIAL, AND COMPENSATING MEANS EFFECTIVE ON SAID CONTROL MEANS AND RESPONSIVE TO BOTH OF SAID MEASURING MEANS TO VARY THE RATE OF FEEDER CORRECTION IN PROPORTION TO CONVEYOR SPEED, SO THAT THE RATE OF FEEDER CORRECTION IS INVERSELY PROPORTIONAL TO THE TIME LAG BETWEEN THE FEEDER AND SAID FIRST MEASURING 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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |