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US3766782A
Expired / Lapsed
US
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Temperature measuring apparatus
Assignee: Individual
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Filing: 1971-01-11
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Granted: 1973-10-23
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Expires: 1991-01-11
Abstract
Abstract Where a value of a variable y which is a function of an observable variable v, given in the form y f(v), is to be determined, an inverse function v g(y) is produced, and the variable y is replaced by a time variable to form a function V g(ct), where c is a constant. To the input of a comparator are applied the variable v and the function V from a function generator which is started by a controller at t 0. At the same time, a time measuring device is operated and subsequently stopped by a coincidence pulse produced by the comparator at t t1. Assuring that the variables v and V have the respective values of v1 and V1, it follows that v1 V1, V1 g(ct1), and as a result, the value of the variable y at the time t1, y1, is given by the following relationship:
Inventors
- 👤 N Shimomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:38
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/16; G01K7/18; G01K7/20; G01K7/21; G01K7/02; G01K7/021; G06; G06G; G06G7/00; G06G7/12; G06G7/26
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
111 words
A temperature measuring apparatus comprising: a temperature sensor providing electrical signals representing a quadratic function of the measured temperature; a function generator comprising first and second integrators operated in cascade so that the second integrator integrates the output of the first integrator to produce a quadratic function of time in the form of an electrical signal; means for comparing said two electrical signals and producing an output at their coincidence in value, and a time measuring device to measure the time interval between the start of the said function of time and said coincidence of the said function of time and the said electrical signal derived from the said temperature sensor.
Claim 2
Dependent Claim
111 words
A temperature measuring apparatus comprising: a temperature sensor providing electrical signals representing a quadratic function of the measured temperature; a function generator comprising first and second integrators operated in cascade so that the second integrator integrates the output of the first integrator to produce a quadratic function of time in the form of an electrical signal; means for comparing said two electrical signals and producing an output at their coincidence in value, and a time measuring device to measure the time interval between the start of the said function of time and said coincidence of the said function of time and the said electrical signal derived from the said temperature sensor.
Claim 3
Dependent Claim
17 words
A temperature measuring apparatus as in claim 1 wherein said temperature sensor is a temperature measuring resistor.
Claim 4
Dependent Claim
15 words
A temperature measuring apparatus as in claim 1 wherein said temperature sensor is a thermocouple.
Claim 5
Dependent Claim
17 words
A temperature measuring apparatus as in claim 1 wherein said time measuring device is an electronic counter.
Claim 6
Dependent Claim
18 words
A temperature measuring apparatus as in claim 1 further including indicating means for displaying the time interval measured.
Claim 7
Dependent Claim
68 words
A temperature measuring apparatus as in claim 1 wherein measurements are repeated at a fixed cyclic rate, and further comprising a constant voltage source, a switch connected to said voltage source and controlled to be conductive during the said time interval, and a meter connected to said switch, said meter indicating the average value of current conducting during the said time interval of each of said fixed cycles.
Claim 8
Dependent Claim
53 words
A temperature measuring apparatus as in claim 1 wherein said time measuring device includes a recorder which prints a dot on a recording medium at the end of each measurement of said time interval at a point whose distance from a reference line of the recording medium is proportional to said time interval.
Claim 9
Dependent Claim
94 words
A temperature measuring device as in claim 1 wherein measurements are repeated at a fixed cyclic rate of measurement, said time measuring device includes a recorder comprising a rotating means which rotates in synchronism with said cylic rate of measurement, a printing means capable of imprinting a mark at the end of said time interval onto a recording medium located between the said rotating means and said printing means such that the mark is imprinted at a point whose distance from a reference line of the recording medium is proportional to said time interval.
Claim 10
Dependent Claim
174 words
A temperature measuring apparatus comprising: a temperature sensor providing electrical signals representing a quadratic function of the measured temperature; a function generator comprising first and second integrators in series; Switching means connected between the input of said second integrator and said electrical signals and having a first position wherein said second integrator integrates said electrical signals derived from the said temperature sensor for a predetermined period of time thereby producing a signal output proportional to the electrical signals derivEd from said temperature sensor, and having a second position wherein said first and second integrators are in cascade such that the second integrator integrates the output of the first integrator thereby producing a function of time represented by a quadratic equation, comparison means connected to the output of said second integrator and producing an output at the coincidence between said function of time and a predetermined value; and a time measuring device to measure the time interval between the start of said function of time and the time of coincidence thereof with said predetermined value.
Claim 11
Dependent Claim
174 words
A temperature measuring apparatus comprising: a temperature sensor providing electrical signals representing a quadratic function of the measured temperature; a function generator comprising first and second integrators in series; Switching means connected between the input of said second integrator and said electrical signals and having a first position wherein said second integrator integrates said electrical signals derived from the said temperature sensor for a predetermined period of time thereby producing a signal output proportional to the electrical signals derivEd from said temperature sensor, and having a second position wherein said first and second integrators are in cascade such that the second integrator integrates the output of the first integrator thereby producing a function of time represented by a quadratic equation, comparison means connected to the output of said second integrator and producing an output at the coincidence between said function of time and a predetermined value; and a time measuring device to measure the time interval between the start of said function of time and the time of coincidence thereof with said predetermined value.
Claim 12
Dependent Claim
153 words
A reciprocal of temperature measuring apparatus comprising: a temperature sensor providing electrical signals represented by a quadratic function of the measured temperature; a function generator comprising first and second integrators operated in cascade, the first integrator receiving as its input the electrical signals derived from the said temperature sensor, and the second integrator integrating the output of the first integrator, thereby producing a function of time in the form of an electrical signal representing a quadratic equation of time with the coefficient of the quadratic term containing the signal derived from the said temperature sensor; comparison means connected to the output of said second integrator and producing an output at the coincidence between said function of time and a predetermined value, and a time measuring device to measure the time interval between the start of the said function of time and the coincidence of the said function of time with said predetermined value.
Claim 13
Dependent Claim
153 words
A reciprocal of temperature measuring apparatus comprising: a temperature sensor providing electrical signals represented by a quadratic function of the measured temperature; a function generator comprising first and second integrators operated in cascade, the first integrator receiving as its input the electrical signals derived from the said temperature sensor, and the second integrator integrating the output of the first integrator, thereby producing a function of time in the form of an electrical signal representing a quadratic equation of time with the coefficient of the quadratic term containing the signal derived from the said temperature sensor; comparison means connected to the output of said second integrator and producing an output at the coincidence between said function of time and a predetermined value, and a time measuring device to measure the time interval between the start of the said function of time and the coincidence of the said function of time with said predetermined value.
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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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |