Patent US3892045A successfully refreshed from Google Patents.
US3892045A
Expired / Lapsed
US
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Fuel allocation system and method for industrial dryers and the like
Assignee: MECHTRON INTERNATIONAL CORP
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Filing: 1974-05-10
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Granted: 1975-07-01
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Expires: 1994-05-10
Abstract
Abstract A fuel allocation system and method includes means, such as a mass flow meter, for measuring the mass flow rate of a moving material and providing an output representative thereof. Means are also provided, such as a moisture gauge, for measuring the amount of moisture in the material to provide a second output. The rate of the heat applied to the material is then regulated responsive to the first and second outputs. In one embodiment the heating capacity of the fuel is instantaneously compared with the heat requirements of the material necessary to raise the output temperature to a preselected level, in order to provide a signal for controlling the rate of fuel flow.
Inventors
- 👤 William T Hage
- 👤 Emanuel J Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:22
CPC Classifications
F; F26; F26B; F26B21/00; F26B21/30; F26B25/00; F26B25/22
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
56 words
In combination: means for measuirng the mass flow rate of a moving material and providing a first output representative thereof; means for measuring the amount of moisture in said material and providing a second output representative thereof; means for heating said material; and means for regulating said heating means responsive to said first and second outputs.
Claim 2
Dependent Claim
56 words
In combination: means for measuirng the mass flow rate of a moving material and providing a first output representative thereof; means for measuring the amount of moisture in said material and providing a second output representative thereof; means for heating said material; and means for regulating said heating means responsive to said first and second outputs.
Claim 3
Dependent Claim
30 words
The combination recited in claim 1 wherein said regulating means comprises means for receiving said two outputs and providing an electrical signal representative of the product of said two outputs.
Claim 4
Dependent Claim
57 words
The combination recited in claim 2 wherein said regulating means further comprises: means for providing an electrical signal representative of the amount of heat capacity of said heating means; means for comparing said electrical signals; and means for controling the amount of heating energy supplied to said heating means responsive to an output from said comparing means.
Claim 5
Dependent Claim
45 words
The combination recited in claim 3 further comprising: means for measuring the ambient temperatures of said material prior to entering said heating means; and means coupled with said ambient temperature measuring means for altering said comparing means output responsive to changes in said ambient temperature.
Claim 6
Dependent Claim
26 words
The combination recited in claim 3 further comprising means for varying the level of said signal representative of the amount of heat in said heating means.
Claim 7
Dependent Claim
42 words
The combination recited in claim 3 wherein said controlling means comprises: a fuel input to said heating means; a valve interposed in said fuel input; and means for controlling said valve to thereby regulate the amount of fuel into said heating means.
Claim 8
Dependent Claim
19 words
The combination recited in claim 6 wherein said valve controlling means comprises a drive motor coupled to said valve.
Claim 9
Dependent Claim
31 words
The combination recited in claim 7 wherein said heat-amount electrical signal providing means comprises means for providing an electrical signal representative of the position of said motor relative to said valve.
Claim 10
Independent Claim
97 words
A system for regulating the amount of heat in a dryer adapted for processing a moving aggregate, said system comprising: means for measuring the mass flow rate of said moving aggregate and providing a first output representative thereof; means for providing a second output representative of the heating capacity of fuel being supplied to said dryer; means for comparing signals proportional to first and second outputs and providing a signal representative of the difference between said proportional signals; and means for regulating fuel flow to said dryer responsive to said difference signal output from said comparing means.
Claim 11
Independent Claim
97 words
A system for regulating the amount of heat in a dryer adapted for processing a moving aggregate, said system comprising: means for measuring the mass flow rate of said moving aggregate and providing a first output representative thereof; means for providing a second output representative of the heating capacity of fuel being supplied to said dryer; means for comparing signals proportional to first and second outputs and providing a signal representative of the difference between said proportional signals; and means for regulating fuel flow to said dryer responsive to said difference signal output from said comparing means.
Claim 12
Dependent Claim
24 words
The system recited in claim 9 further comprising means for measuring the percent of moisture in said aggregate and providing an output representative thereof.
Claim 13
Dependent Claim
39 words
The system recited in claim 10 further comprising first multiplying means for multiplying said first output from said mass flow measuring means and said output from said percent moisture means, and for providing a first multiplied signal representative thereof.
Claim 14
Dependent Claim
18 words
The system recited in claim 11 further comprising means for determining the mass of moisture in said aggregate.
Claim 15
Dependent Claim
38 words
The system recited in claim 12 wherein said moisture mass measuring means comprises means for determining the magnitude of the difference between said first output and said first multiplied signal and providing a first difference signal representative thereof.
Claim 16
Dependent Claim
22 words
The system recited in claim 13 further comprising means for preselecting a temperature of said aggregate prior to movement through said dryer.
Claim 17
Dependent Claim
21 words
The system recited in claim 14 further comprising means for preselecting a temperature of said aggregate after movement through said dryer.
Claim 18
Dependent Claim
33 words
The system recited in claim 15 further comprising means for determining the temperature difference of said aggregate prior to and after movement through said dryer, and providing a second difference signal representative thereof.
Claim 19
Dependent Claim
27 words
The system recited in claim 16 further comprising second multiplying means for multiplying said first and second differential signals, and providing a second multiplied signal representative thereof.
Claim 20
Dependent Claim
43 words
The system recited in claim 17 wherein said dryer includes an exhaust stack for exhausting hot gases during drying of said moving aggregate, said system further comprising means for sensing the temperature in said stack, and for providing an output signal representative thereof.
Claim 21
Dependent Claim
28 words
The system recited in claim 18 further comprising means for calculating the heat required to raise the moisture in said aggregate to the temperature measured in said stack.
Claim 22
Dependent Claim
146 words
The system recited in claim 19 wherein said calculating means comprises: third multiplying means for multiplying the first multiplied signal by the signal output from said stack temperature measuring means; fourth multiplying means for multiplying the first multiplied signAl by a constant representing the amount of heat required to convert a unit weight of water of 212* F. into steam at 212* F.; fifth multiplying means for multiplying the first multiplied signal by the output of said means for measuring the temperature of said aggregate prior to movement through said dryer; first adding means for adding the outputs of said third, fourth and fifth multiplying means; second adding means for adding the output of said first adding means with said second multiplied signals; and wherein; the output of said second adding means comprises said signal to said comparing means which is proportional to said first output.
Claim 23
Dependent Claim
41 words
The system recited in claim 9 wherein said multiplier includes a fuel flow valve operated by a motor, and wherein said second output means comprises means for determining the fuel flow rate through said valve and providing an output representative thereof.
Claim 24
Dependent Claim
42 words
The system recited in claim 21 further comprising: means for preselecting a given heat capacity value to fuel flowing through said valve; and means for adjusting said output from said fuel flow rate detecting means with respect to said heat capacity value.
Claim 25
Dependent Claim
39 words
The system recited in claim 22 wherein said adjusting means comprises multiplying means for multiplying said output from said fuel flow rate detector by a signal representative of said heat capacity value and providing a multiplied signal representative thereof.
Claim 26
Dependent Claim
18 words
The system recited in claim 23 wherein said multiplied signal comprises said signal proportional to said second output.
Claim 27
Independent Claim
92 words
A system for regulating the amount of heat applied to a material to remove moisture contained therein, comprising: means for measuring the per cent moisture in said material and providing a first output representative thereof; means for measuring the temperature of said material and providing a second output representative thereof; heating means; means for delivering fuel to said heating means; and means for receiving said first and second outputs and controlling said fuel delivering means to allow only that amount of heat capacity in said heating means necessary to remove said moisture.
Claim 28
Independent Claim
92 words
A system for regulating the amount of heat applied to a material to remove moisture contained therein, comprising: means for measuring the per cent moisture in said material and providing a first output representative thereof; means for measuring the temperature of said material and providing a second output representative thereof; heating means; means for delivering fuel to said heating means; and means for receiving said first and second outputs and controlling said fuel delivering means to allow only that amount of heat capacity in said heating means necessary to remove said moisture.
Claim 29
Independent Claim
64 words
A method for regulating the amount of heat in a heater adapted for drying a moving aggregate, said method comprising the steps of: measuring the mass flow rate of said aggregate and providing a first output representative thereof: measuring the amount of moisture in said aggregate and providing a second output representative thereof; and regulating said heater responsive to said first and second outputs.
Claim 30
Independent Claim
64 words
A method for regulating the amount of heat in a heater adapted for drying a moving aggregate, said method comprising the steps of: measuring the mass flow rate of said aggregate and providing a first output representative thereof: measuring the amount of moisture in said aggregate and providing a second output representative thereof; and regulating said heater responsive to said first and second outputs.
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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |