US3875504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for continuously determining the moisture content of a moving ore bed
Assignee: Johns Manville Corp
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Filing: 1972-02-17
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Granted: 1975-04-01
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Expires: 1992-02-17
Abstract
Abstract The disclosure relates to a method for controlling the moisture content of ore exiting from a drier and an apparatus for effecting the measurement of the moisture content. A portion of the ore exiting from the drier is diverted onto a conveyor to form a moving ore bed sample. The moisture content of this sample is measured by an apparatus which comprises a conductivity meter provided with a pair of electrodes having convex surfaces in contact with the moving surface of the ore sample. The electrodes are maintained a fixed relative distance apart to insure a constant amount of ore therebetween and thus an accurate relative measurement of the moisture content for different positions of the ore bed as the ore passes by the electrodes. The measurements are converted to signals which actuate control apparatus to effect any necessary adjustments in the drying process to maintain the moisture content of the ore within specified limits.
Inventors
- 👤 Jr Frederick Mercer Bodycomb
- 👤 James Julius Barna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:45
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/048; G01R; G01R27/00; G01R27/02; G01R27/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
205 words
An apparatus for measuring the moisture content of a moving mineral ore bed comprising a first conveyor means for moving the ore bed, a conductivity meter, first and second electrodes connected to said conductivity meter, said electrodes having surfaces for contacting the surface of a moving ore bed, said contact portions being a fixed relative distance apart, the improvement comprising diverter means to divert a small portion of the moving ore bed from said first conveyor means to form a moving ore bed on an ore sample conveyor, each of said electrodes having a convex surface portion of equal curvature, the electrodes being pivotally mounted at one end to enable the convex surfaces of said electrodes to ride on the surface of the moving ore bed on said ore sample conveyor, each electrode having an upper section which is pivotally mounted and a lower section with said convex surface portion thereon, said lower section being separably secured to said upper section to facilitate the replacement of said lower section when required, and each of said electrodes being provided with a stop means to prevent said electrodes from pivoting into contact with said ore sample conveyor when there is no ore on the ore sample conveyor.
Claim 2
Independent Claim
205 words
An apparatus for measuring the moisture content of a moving mineral ore bed comprising a first conveyor means for moving the ore bed, a conductivity meter, first and second electrodes connected to said conductivity meter, said electrodes having surfaces for contacting the surface of a moving ore bed, said contact portions being a fixed relative distance apart, the improvement comprising diverter means to divert a small portion of the moving ore bed from said first conveyor means to form a moving ore bed on an ore sample conveyor, each of said electrodes having a convex surface portion of equal curvature, the electrodes being pivotally mounted at one end to enable the convex surfaces of said electrodes to ride on the surface of the moving ore bed on said ore sample conveyor, each electrode having an upper section which is pivotally mounted and a lower section with said convex surface portion thereon, said lower section being separably secured to said upper section to facilitate the replacement of said lower section when required, and each of said electrodes being provided with a stop means to prevent said electrodes from pivoting into contact with said ore sample conveyor when there is no ore on the ore sample conveyor.
Claim 3
Dependent Claim
27 words
An apparatus for measuring the moisture content of a moving ore bed as defined in claim 1 wherein said electrodes are offset with respect to each other.
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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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |