US4179745A
Expired / Lapsed
US
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Thermocouple linearizer circuit
Assignee: Gentran Inc
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Filing: 1978-05-30
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Granted: 1979-12-18
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Expires: 1998-05-30
Abstract
Abstract A thermocouple linearizer circuit for use in a device for digitally displaying the temperature of a thermocouple. The circuit includes a plurality of proportional correction means, each connected to receive a non-linear electrical signal representing the temperature of a thermocouple. The correction circuits generate a correction signal proportional to the difference between a non-linear electrical signal and a predetermined reference signal. The correction signals are initiated when the non-linear signal exceeds the respective reference signal in each correction circuit. An arithmetic unit is included for adding the correction signals and the non-linear signal thereby forming a signal corresponding to a linear function of the temperature of the thermocouple.
Inventors
- 👤 James W. Wuertele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:51
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/02; G01K7/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
79 words
A thermocouple linearizer circuit comprising: proportional correction means connected to receive a non-linear electrical signal representing the temperature of a thermocouple for generating a linearization correction signal proportional to the difference between said electrical signal and a first predetermined reference signal, said linearization correction signal being generated when said electrical signal exceeds said reference signal, and arithmetic means for adding said correction signal and said electrical signal thereby forming a linear signal corresponding to the temperature of said thermocouple.
Claim 2
Dependent Claim
79 words
A thermocouple linearizer circuit comprising: proportional correction means connected to receive a non-linear electrical signal representing the temperature of a thermocouple for generating a linearization correction signal proportional to the difference between said electrical signal and a first predetermined reference signal, said linearization correction signal being generated when said electrical signal exceeds said reference signal, and arithmetic means for adding said correction signal and said electrical signal thereby forming a linear signal corresponding to the temperature of said thermocouple.
Claim 3
Dependent Claim
89 words
A thermocouple linearizer circuit for use in a digital display device comprising: a plurality of proportional correction means connected to receive a non-linear electrical signal, each of said linearization correction means including means for generating a correction signal proportional to the difference between said non-linear signal and a predetermined reference signal, said linearization correction signals being generated when said non-linear signal exceeds said reference signal, and arithmetic means for adding said correction signals and said non-linear signals thereby forming a linear signal corresponding to the temperature of said thermocouple.
Claim 4
Dependent Claim
89 words
A thermocouple linearizer circuit for use in a digital display device comprising: a plurality of proportional correction means connected to receive a non-linear electrical signal, each of said linearization correction means including means for generating a correction signal proportional to the difference between said non-linear signal and a predetermined reference signal, said linearization correction signals being generated when said non-linear signal exceeds said reference signal, and arithmetic means for adding said correction signals and said non-linear signals thereby forming a linear signal corresponding to the temperature of said thermocouple.
Claim 5
Dependent Claim
28 words
A circuit as in claim 2 further including amplifier means connected to receive said non-linear electrical signal for amplifying said electrical signal thereby forming an amplified non-linear signal.
Claim 6
Dependent Claim
89 words
A circuit as in claim 3 wherein each of said correction means includes first trimmer means for generating said reference signal, second amplifier means connected to receive said reference signal and to receive said amplified non-linear signal for initiating said correction signal, second trimmer means connected to said second amplifier means for controlling the value of said proportional correction signal, and diode means connected to said second amplifier means and to said second trimmer means for preventing said correction signal when said electrical signal is below said reference signal.
Claim 7
Dependent Claim
23 words
A circuit as in claim 3 wherein said arithmetic means includes means for adding the correction signals from each of said correction means.
Claim 8
Dependent Claim
23 words
A circuit as in claim 3 wherein said arithmetic means includes means for subtracting said correction signals from each of said correction means.
Claim 9
Dependent Claim
75 words
A linearizer circuit comprising: proportional correction means connected to receive a non-linear electrical signal representing the temperature of a thermocouple for generating a correctional signal proportional to the difference between said non-linear signal and a first predetermined reference signal, said linearization correction signal being generated when said non-linear signal exceeds said reference signal, and arithmetic means for adding said correction signal and said non-linear signal thereby forming a linear signal corresponding to said electrical signal.
Claim 10
Dependent Claim
75 words
A linearizer circuit comprising: proportional correction means connected to receive a non-linear electrical signal representing the temperature of a thermocouple for generating a correctional signal proportional to the difference between said non-linear signal and a first predetermined reference signal, said linearization correction signal being generated when said non-linear signal exceeds said reference signal, and arithmetic means for adding said correction signal and said non-linear signal thereby forming a linear signal corresponding to said electrical signal.
Claim 11
Dependent Claim
80 words
In a thermocouple linearizer circuit for use in a digital display device, the method comprising the steps of: generating a linearization correction signal proportional to the difference between a non-linear electrical signal representing the temperature of a thermocouple and a first predetermined reference signal, said correctional signal being generated when said electrical signal exceeds said reference signal, and adding said linearization correction signal and said electrical signal thereby forming a linear electrical signal corresponding to the temperature of said thermocouple.
Claim 12
Dependent Claim
80 words
In a thermocouple linearizer circuit for use in a digital display device, the method comprising the steps of: generating a linearization correction signal proportional to the difference between a non-linear electrical signal representing the temperature of a thermocouple and a first predetermined reference signal, said correctional signal being generated when said electrical signal exceeds said reference signal, and adding said linearization correction signal and said electrical signal thereby forming a linear electrical signal corresponding to the temperature of said thermocouple.
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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) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |