Patent US3675465A successfully refreshed from Google Patents.
US3675465A
Expired / Lapsed
US
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Apparatus and method for differential thermal analysis
Assignee: Individual
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Filing: 1969-10-07
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Granted: 1972-07-11
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Expires: 1989-10-07
Abstract
Abstract A method of thermal analysis which includes the steps of controlling the temperatures of at least two units to correspond to a predetermined temperature program, and of measuring the power required by each unit to cause its temperature to correspond to the program.
Inventors
- 👤 Gunter Sommer
- 👤 Hans Walter Sander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:34
CPC Classifications
G; G01; G01N; G01N25/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
92 words
A method of differential thermal analysis which includes the steps of causing the temperature of each of at least two units to correspond over a time period to a predetermined temperature program, of detecting the temperature differences within the said time period between each unit and the program, of using such temperature difference to vary power supplied to each said unit to cause the temperature of each said unit to correspond to the program, of recording the temperature of any unit, and of comparing the electrical power supplied to any two units.
Claim 2
Independent Claim
92 words
A method of differential thermal analysis which includes the steps of causing the temperature of each of at least two units to correspond over a time period to a predetermined temperature program, of detecting the temperature differences within the said time period between each unit and the program, of using such temperature difference to vary power supplied to each said unit to cause the temperature of each said unit to correspond to the program, of recording the temperature of any unit, and of comparing the electrical power supplied to any two units.
Claim 3
Independent Claim
94 words
A method of differential thermal analysis which includes the steps of causing the temperature of each of at least two units to correspond over a time period to a predetermined temperature program, of detecting the temperature differences within the said time period between each unit and the program, of using such temperature difference to vary power supplied to each said unit to cause the temperature of each said unit to correspond to the program, of recording the temperature difference between any two units, and of comparing the electrical power supplied to any two units.
Claim 4
Independent Claim
94 words
A method of differential thermal analysis which includes the steps of causing the temperature of each of at least two units to correspond over a time period to a predetermined temperature program, of detecting the temperature differences within the said time period between each unit and the program, of using such temperature difference to vary power supplied to each said unit to cause the temperature of each said unit to correspond to the program, of recording the temperature difference between any two units, and of comparing the electrical power supplied to any two units.
Claim 5
Independent Claim
85 words
A method of differential thermal analysis which includes the steps of causing the temperature of each of at least two units to correspond over a time period to a predetermined temperature program, of detecting the temperature differences within the said time period between each unit and tHe program, of using such temperature difference to vary power supplied to each said unit to cause the temperature of each said unit to correspond to the program, and of comparing the electrical power supplied to any two units.
Claim 6
Independent Claim
85 words
A method of differential thermal analysis which includes the steps of causing the temperature of each of at least two units to correspond over a time period to a predetermined temperature program, of detecting the temperature differences within the said time period between each unit and tHe program, of using such temperature difference to vary power supplied to each said unit to cause the temperature of each said unit to correspond to the program, and of comparing the electrical power supplied to any two units.
Claim 7
Dependent Claim
141 words
Temperature balance analyser apparatus, operable in accordance with a program of temperature variation over a time period, which includes at least two units of equipment with at least one of said units containing a sample during said time period; power-varying means for causing the temperature of each of said at least two units to correspond individually during said time period to a predetermined temperature program; said power-varying means including means to supply said predetermined temperature program to said power-varying means; compensating means for each unit for detecting the temperature difference between each said unit and the program, and for causing the power-varying means of each said unit to act so as to cause the temperature of each said unit to correspond to the program; and output means for obtaining measurement information relating to the electrical power supplied to any two units.
Claim 8
Dependent Claim
141 words
Temperature balance analyser apparatus, operable in accordance with a program of temperature variation over a time period, which includes at least two units of equipment with at least one of said units containing a sample during said time period; power-varying means for causing the temperature of each of said at least two units to correspond individually during said time period to a predetermined temperature program; said power-varying means including means to supply said predetermined temperature program to said power-varying means; compensating means for each unit for detecting the temperature difference between each said unit and the program, and for causing the power-varying means of each said unit to act so as to cause the temperature of each said unit to correspond to the program; and output means for obtaining measurement information relating to the electrical power supplied to any two units.
Claim 9
Dependent Claim
23 words
Apparatus according to claim 4, and which includes means for setting any desired temperature gap between any of the units and the program.
Claim 10
Dependent Claim
23 words
Apparatus according to claim 4, in which said output means includes means to record a variable related to the temperature of any unit.
Claim 11
Dependent Claim
26 words
Apparatus according to claim 4, in which said output means includes means to record a variable related to the difference in temperature between any two units.
Claim 12
Dependent Claim
119 words
Temperature balance analyser apparatus, which includes power-varying means for causing the temperatures of each of at least two units to correspond individually to a predetermined temperature program; and compensating means for each unit for detecting the temperature difference between each said unit and the program, and for causing the power-varying means of each said unit to act so as to cause the temperature of each said unit to correspond to the program; each unit including a thermocouple, and the apparatus including circuitry means connected to said thermocouple to enable the thermocouple to perform both heating and temperature sensing functions of the unit, and output means for obtaining measurement information relating to the electrical power supplied to any two units.
Claim 13
Dependent Claim
119 words
Temperature balance analyser apparatus, which includes power-varying means for causing the temperatures of each of at least two units to correspond individually to a predetermined temperature program; and compensating means for each unit for detecting the temperature difference between each said unit and the program, and for causing the power-varying means of each said unit to act so as to cause the temperature of each said unit to correspond to the program; each unit including a thermocouple, and the apparatus including circuitry means connected to said thermocouple to enable the thermocouple to perform both heating and temperature sensing functions of the unit, and output means for obtaining measurement information relating to the electrical power supplied to any two units.
Claim 14
Dependent Claim
30 words
Apparatus as claimed in claim 8, and which includes a heat shield for each thermocouple, and means for causing each heat shield to correspond to the temperature of its thermocouple.
Claim 15
Dependent Claim
68 words
Apparatus as claimed in claim 8, in which each thermocouple forms part of a circuit including a power converter having a silicon controlled halfwave rectifier connected to each said thermocouple, and in which there are provided means for utilizing part only of a cycle of current for energizing the thermocouple for heating purposes, and for utilizing another part of the cycle for determining the temperature of the thermocouple.
Claim 16
Independent Claim
90 words
A method of differential thermal analysis which includes the steps of controlling the temperature of one unit over a time period so that its temperature corresponds within the said time period to a predetermined temperature program by varying the power supplied to said unit, of controlling the temperature of at least one other unit so that its temperature is offset by a predetermined constant temperature gap from the said temperature program by varying the power supplied to said other unit, and of comparing the power so supplied to the units.
Claim 17
Independent Claim
90 words
A method of differential thermal analysis which includes the steps of controlling the temperature of one unit over a time period so that its temperature corresponds within the said time period to a predetermined temperature program by varying the power supplied to said unit, of controlling the temperature of at least one other unit so that its temperature is offset by a predetermined constant temperature gap from the said temperature program by varying the power supplied to said other unit, and of comparing the power so supplied to the units.
References Cited (Backward Citations)
US3103573A
Cited
US3263484A
Cited
US3283560A
Cited
US3285053A
Cited
US3298220A
Cited
US3417604A
Cited
US3477274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |