US3593580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic peak-picker
Assignee: United States Steel Corp
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Filing: 1969-04-22
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Granted: 1971-07-20
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Expires: 1989-04-22
Abstract
Abstract This invention relates to apparatus for determining the temperature of one of a kiln load and a heated fluid stream at a predetermined location on a longitudinal axis of a kiln having the heated fluid stream passing therethrough and for heating the kiln load. The apparatus has a temperature-responsive means connected to the kiln at the predetermined location and rotatable with the kiln to cyclically pass through the kiln load and the heated fluid stream to produce a temperature signal. A rate switch module is connected to the temperature-responsive means for producing a blocking output from an increasing voltage input from the temperature-responsive means while the temperatureresponsive means is passing through the fluid stream and a tracking output from a decreasing voltage input from the temperature-responsive means while the temperature-responsive means is passing through the kiln load. Alternatively, the rate switch module produces a blocking output from a decreasing voltage input from the temperature-responsive means while the temperature-responsive means is passing through the kiln load and a tracking output from an increasing voltage input from the temperature-responsive means while the temperature-responsive means is passing through the heated fluid stream. In addition, the apparatus has a first relay, a comparator module connected to the temperature-responsive means and to the first relay, and a track and hold module connected to the temperature-responsive means and to the comparator module and operable to provide a substantially maximum output signal and a substantially minimum output signal to the comparator module when the temperatureresponsive means is passing through the fluid stream and the kiln load respectively so that when the temperature signal is less than the maximum output signal and greater than the minimum output signal respectively, the first relay is energized by the comparator module. The rate switch module is operable while the rate switch module is receiving a decreasing temperature signal and an increasing temperature signal respectively to produce the tracking output thereby causing the output signal of the track and hold module to follow the temperature signal being fed to the track and hold module and to then produce the blocking output, thereby holding the output signal of the track and hold module at a substantially minimum temperature signal and a substantially maximum temperature signal respectively. The comparator module then is operable to deenergize the first relay when the temperature signal is greater than the output signal of the track and hold module and less than the output signal of the track and hold module respectively, and reset means are connectable to the track and hold module to apply a tracking output to the track and hold module and operable to connect the track and hold module to a substantially maximum temperature signal and a substantially minimum temperature signal respectively, thereby producing a substantially maximum output signal and substantially minimum output signal respectively to the comparator module.
Inventors
- 👤 Norman C Ludwig
- 👤 Gillard Harrity
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:04
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/02; G01K7/021; G01K1/00; G01K1/14
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
353 words
Apparatus for determining the temperature of a kiln load at a predetermined location on a longitudinal axis of a kiln having a heated fluid stream passing therethrough and for heating said kiln load, said apparatus having: a. a temperature-responsive means connected to said kiln at said predetermined location and rotatable with said kiln to cyclically pass through said kiln load and said heated fluid stream to produce a temperature signal, b. a rate switch module connected to said temperature-responsive means for producing a blocking output from an increasing voltage input from said temperature-responsive means while said temperature-responsive means is passing through said fluid stream and a tracking output from a decreasing voltage input from said temperature-responsive means while said temperatureresponsive means is passing through said kiln load, c. a first relay, d. a comparator module connected to said temperature-responsive means and to said first relay, e. a track and hold module connected to said temperatureresponsive means and to said comparator module and operable to provide a substantially maximum output signal to said comparator module when said temperature-responsive means is passing through said fluid stream so that when said temperature signal is less than said maximum output signal said first relay is energized by said comparator module, 1. said rate switch module being operable while said rate switch module is receiving a decreasing temperature signal to produce said tracking output thereby causing the output signal of said track and hold module to follow said temperature signal being fed to said track and hold module and to then produce said blocking output thereby holding said output signal of said track and hold module at a substantially minimum temperature signal, 2. said comparator module then being operable to deenergize said first relay when said temperature signal is greater than said output signal of said track and hold module, and f. reset means connectable to said track and hold module to apply a tracking output to said track and hold module and operable to connect said track and hold module to a suBstantially maximum temperature signal thereby producing a substantially maximum output signal to said comparator module.
Claim 2
Dependent Claim
353 words
Apparatus for determining the temperature of a kiln load at a predetermined location on a longitudinal axis of a kiln having a heated fluid stream passing therethrough and for heating said kiln load, said apparatus having: a. a temperature-responsive means connected to said kiln at said predetermined location and rotatable with said kiln to cyclically pass through said kiln load and said heated fluid stream to produce a temperature signal, b. a rate switch module connected to said temperature-responsive means for producing a blocking output from an increasing voltage input from said temperature-responsive means while said temperature-responsive means is passing through said fluid stream and a tracking output from a decreasing voltage input from said temperature-responsive means while said temperatureresponsive means is passing through said kiln load, c. a first relay, d. a comparator module connected to said temperature-responsive means and to said first relay, e. a track and hold module connected to said temperatureresponsive means and to said comparator module and operable to provide a substantially maximum output signal to said comparator module when said temperature-responsive means is passing through said fluid stream so that when said temperature signal is less than said maximum output signal said first relay is energized by said comparator module, 1. said rate switch module being operable while said rate switch module is receiving a decreasing temperature signal to produce said tracking output thereby causing the output signal of said track and hold module to follow said temperature signal being fed to said track and hold module and to then produce said blocking output thereby holding said output signal of said track and hold module at a substantially minimum temperature signal, 2. said comparator module then being operable to deenergize said first relay when said temperature signal is greater than said output signal of said track and hold module, and f. reset means connectable to said track and hold module to apply a tracking output to said track and hold module and operable to connect said track and hold module to a suBstantially maximum temperature signal thereby producing a substantially maximum output signal to said comparator module.
Claim 3
Dependent Claim
75 words
said comparator module then being operable to deenergize said first relay when said temperature signal is less than said output signal of said track and hold module, and f. reset means connectable to said track and hold module to apply a tracking output to said track and hold module and operable to connect said track and hold module to a substantially maximum temperature signal thereby producing a substantially maximum output signal to said comparator module.
Claim 4
Dependent Claim
75 words
said comparator module then being operable to deenergize said first relay when said temperature signal is less than said output signal of said track and hold module, and f. reset means connectable to said track and hold module to apply a tracking output to said track and hold module and operable to connect said track and hold module to a substantially maximum temperature signal thereby producing a substantially maximum output signal to said comparator module.
Claim 5
Dependent Claim
75 words
said comparator module then being operable to deenergize said first relay when said temperature signal is greater than said output signal of said track and hold module, and f. reset means connectable to said track and hold module to apply a tracking output to said track and hold module and operable to connect said track and hold module to a suBstantially maximum temperature signal thereby producing a substantially maximum output signal to said comparator module.
Claim 6
Dependent Claim
75 words
said comparator module then being operable to deenergize said first relay when said temperature signal is greater than said output signal of said track and hold module, and f. reset means connectable to said track and hold module to apply a tracking output to said track and hold module and operable to connect said track and hold module to a suBstantially maximum temperature signal thereby producing a substantially maximum output signal to said comparator module.
Claim 7
Dependent Claim
20 words
The apparatus recited in claim 1 and having amplifier means connected to said temperature-responsive means for amplifying said temperature signal.
Claim 8
Dependent Claim
18 words
The apparatus recited in claim 2 wherein said amplifier means has means for cold junction reference junction compensation.
Claim 9
Dependent Claim
17 words
The apparatus recited in claim 2 wherein said amplifier means has means for inverting said temperature signal.
Claim 10
Dependent Claim
39 words
The apparatus recited in claim 4 and having said amplifier means connected to said comparator module and having means for reinverting said temperature signal and recording means connected to said comparator module for recording continuous temperature in said kiln.
Claim 11
Dependent Claim
22 words
The apparatus recited in claim 1 and having recording means connected to said temperature-responsive means for recording continuous temperature in said kiln.
Claim 12
Dependent Claim
35 words
The apparatus recited in claim 1 and having a variable-lag module connectable by said reset means to said track and hold module to receive a substantially minimum temperature signal from said track and hold module.
Claim 13
Dependent Claim
15 words
The apparatus recited in claim 7 and having recording means connected to said variable-lag module.
Claim 14
Dependent Claim
17 words
The apparatus recited in claim 7 and having floating power supply means connected to said variable-lag module.
Claim 15
Dependent Claim
22 words
The apparatus recited in claim 7 wherein said variable-lag module averages successive substantially minimum temperature signals from said track and hold module.
Claim 16
Dependent Claim
15 words
The apparatus recited in claim 10 and having recording means connected to said variable-lag module.
Claim 17
Dependent Claim
17 words
The apparatus recited in claim 10 and having floating power supply means connected to said variable-lag module.
Claim 18
Dependent Claim
40 words
The apparatus recited in claim 1 and having reference supply means connectable by said reset means to said track and hold module to provide said substantially maximum temperature signal to said track and hold module during resetting of said apparatus.
Claim 19
Dependent Claim
26 words
The apparatus recited in claim 1 and having power supply means connected to said rate switch module, said comparator module and said track and hold module.
Claim 20
Dependent Claim
23 words
The apparatus recited in claim 1 wherein said reset means has a limit switch operable by said kiln to start said reset means.
Claim 21
Dependent Claim
23 words
The apparatus recited in claim 15 wherein said reset means has a first switch for holding said reset means in the energized condition.
Claim 22
Dependent Claim
25 words
The apparatus recited in claim 15 wherein said reset means has a second switch for connecting said track and hold module to said tracking signal.
Claim 23
Dependent Claim
38 words
The apparatus recited in claim 17 wherein said reset means has a second relay energizable by said second switch, a. said second relay being operable to connect said track and hold module to said substantially maximum temperature signal.
Claim 24
Dependent Claim
35 words
The apparatus recited in claim 15 wherein said reset means has a third switch connected to said track and hold module and a variable-lag module connectable by said switch to said track and hold module.
Claim 25
Dependent Claim
212 words
Apparatus for determining the temperature of a heated fluid stream at a predetermined location on a longitudinal axis of a kiln having a kiln load and said heated fluid stream passing therethrough and for heating said kiln load, said apparatus having: a. a temperature-responsive means connected to said kiln at said predetermined location and rotatable with said kiln to cyclically pass through said kiln load and said heated fluid stream to produce a temperature signal, b. a rate switch module connected to said temperature-responsive means for producing a blocking output from a decreasing voltage input from said temperature-responsive means while said temperature-responsive means is passing through said kiln load and a tracking output from an increasing voltage input from said temperature-responsive means while said temperature-responsive means is passing through said heated fluid stream, c. a first relay, d. A comparator module connected to said temperature-responsive means and to said first relay, e. a track and hold module connected to said temperature-responsive means and to said comparator module and operable to provide a substantially minimum output signal to said comparator module when said temperature-responsive means is passing through said kiln load so that when said temperature signal is greater than said minimum output signal, said first relay is energized by said comparator module,
Claim 26
Dependent Claim
212 words
Apparatus for determining the temperature of a heated fluid stream at a predetermined location on a longitudinal axis of a kiln having a kiln load and said heated fluid stream passing therethrough and for heating said kiln load, said apparatus having: a. a temperature-responsive means connected to said kiln at said predetermined location and rotatable with said kiln to cyclically pass through said kiln load and said heated fluid stream to produce a temperature signal, b. a rate switch module connected to said temperature-responsive means for producing a blocking output from a decreasing voltage input from said temperature-responsive means while said temperature-responsive means is passing through said kiln load and a tracking output from an increasing voltage input from said temperature-responsive means while said temperature-responsive means is passing through said heated fluid stream, c. a first relay, d. A comparator module connected to said temperature-responsive means and to said first relay, e. a track and hold module connected to said temperature-responsive means and to said comparator module and operable to provide a substantially minimum output signal to said comparator module when said temperature-responsive means is passing through said kiln load so that when said temperature signal is greater than said minimum output signal, said first relay is energized by said comparator module,
Claim 27
Dependent Claim
20 words
The apparatus recited in claim 20 and having amplifier means connected to said temperature-responsive means for amplifying said temperature signal.
Claim 28
Dependent Claim
18 words
The apparatus recited in claim 21 wherein said amplifier means has means for cold junction reference junction compensation.
Claim 29
Dependent Claim
22 words
The apparatus recited in claim 20 and having recording means connected to said temperature-responsive means for recording continuous temperature in said kiln.
Claim 30
Dependent Claim
35 words
The apparatus recited in claim 20 and having a variable-lag module connectable by said reset means to said track and hold module to receive a substantially maximum temperature signal from said track and hold module.
Claim 31
Dependent Claim
15 words
The apparatus recited in claim 24 and having recording means connected to said variable-lag module.
Claim 32
Dependent Claim
17 words
The apparatus recited in claim 24 and having floating power supply means connected to said variable-lag module.
Claim 33
Dependent Claim
22 words
The apparatus recited in claim 24 wherein said variable-lag module averages successive substantially minimum temperature signal from said track and hold module.
Claim 34
Dependent Claim
15 words
The apparatus recited in claim 27 and having recording means connected to said variable-lag module.
Claim 35
Dependent Claim
17 words
The apparatus recited in claim 27 and having floating power supply means connected to said variable-lag module.
Claim 36
Dependent Claim
26 words
The apparatus recited in claim 20 and having power supply means connected to said rate switch module, said comparator module and said track and hold module.
Claim 37
Dependent Claim
23 words
The apparatus recited in claim 20 wherein said reset means has a limit switch operable by said kiln to start said reset means.
Claim 38
Dependent Claim
23 words
The apparatus recited in claim 31 wherein said reset means has a first switch for holding said reset means in the energized condition.
Claim 39
Dependent Claim
25 words
The apparatus recited in claim 31 wherein said reset means has a second switch for connecting said track and hold module to said tracking signal.
Claim 40
Dependent Claim
38 words
The apparatus recited in claim 33 wherein said reset means has a second relay energizable by said second switch, a. said second relay being operable to connect said track and hold module to said substantially maximum temperature signal.
Claim 41
Dependent Claim
35 words
The apparatus recited in claim 31 wherein said reset means has a third switch connected to said track and hold module and a variable-lag module connectable by said switch to said track and hold module.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |