US3988682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage ramp temperature controller
Assignee: United States Department of the Navy
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Filing: 1975-06-23
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Granted: 1976-10-26
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Expires: 1995-06-23
Abstract
Abstract A temperature control circuitry for use in detecting the temperature of a vice and providing a programming voltage output for controlling a heating apparatus to vary the temperature of the device. The circuitry utilizes a thermocouple as a sensing element in conjunction with a sweep voltage generator and is capable of controlling the time required to heat the device, depending on its material, to a specific temperature over a wide range of temperature values. This is accomplished by superimposition of the thermocouple voltage of the device on a linear ramp voltage generated by the sweep voltage generator. The error signal produced is further processed to control the output of power supplied to heating elements in order that a linear temperature rise or fall of the heated device results over a predetermined elapsed time.
Inventors
- 👤 Paul Mikonis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:52
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/02; G01K7/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
142 words
An electronic circuit providing an output control signal that is in direct relation to an input signal, comprising: an input signal having a rate of change; means for generating a sweep voltage signal which varies in a predetermined fashion between a first preselected voltage and a second preselected voltage over a preselected time period; first summing means having said sweep voltage signal and said input signal operatively coupled thereto for summing said sweep voltage and input signals to provide an error signal output, said error signal having an amplitude directly related to any deviation between said input and sweep voltage signals; second summing means having said error signal output and said sweep voltage signal operatively coupled thereto for summing said error and sweep voltage signals to provide a control signal output operative to control the rate of change of said input signal.
Claim 2
Dependent Claim
142 words
An electronic circuit providing an output control signal that is in direct relation to an input signal, comprising: an input signal having a rate of change; means for generating a sweep voltage signal which varies in a predetermined fashion between a first preselected voltage and a second preselected voltage over a preselected time period; first summing means having said sweep voltage signal and said input signal operatively coupled thereto for summing said sweep voltage and input signals to provide an error signal output, said error signal having an amplitude directly related to any deviation between said input and sweep voltage signals; second summing means having said error signal output and said sweep voltage signal operatively coupled thereto for summing said error and sweep voltage signals to provide a control signal output operative to control the rate of change of said input signal.
Claim 3
Dependent Claim
46 words
The circuit of claim 1 wherein said first summing means comprises; an operational amplifier having a non-inverted output, and a resistive feedback path coupled between the input and output of said operational amplifier whereby said operational amplifier algebraically adds said input signal and sweep voltage signal.
Claim 4
Dependent Claim
36 words
The circuit of claim 1 wherein said first summing means comprises: an integrated circuit containing a non-inverting operational amplifier having resistive feedback wherein the inputs to said integrated circuit are algebraically added to provide an output.
Claim 5
Dependent Claim
46 words
The circuit of claim 1 wherein said second summing means comprises: an operational amplifier having an inverted output, and a resistive feedback path coupled between the input and output of said operational amplifier whereby said operational amplifier algebraically adds said input signal and sweep voltage signal.
Claim 6
Dependent Claim
36 words
The circuit of claim 1 wherein said second summing means comprises: an integrated circuit containing an inverting operational amplifier having resistive feedback wherein the inputs to said integrated circuit are algebraically added to provide an output.
Claim 7
Dependent Claim
177 words
An electronic temperature control circuit which provides an output control signal in direct relation to the temperature of a device being heated to cause a predetermined change in the temperature of said device, comprising: temperature sensing means attached to said device for providing an output signal proportional to the temperature sensed; means for generating a sweep voltage signal, which varies in a predetermined fashion between a first preselected voltage and a second preselected voltage over a preselected time period; first summing means having said temperature sensing means output signal and said sweep voltage signal operatively coupled thereto for summing said temperature sensing means output and sweep voltage signals to provide an error signal output, said error signal having an amplitude directly related to any deviation between said temperature sensing means output and said sweep voltage signals; second summing means having said error signal output and said sweep voltage signal operatively coupled thereto for summing said error and sweep voltage signals to provide a control signal output operative to control the amount of heat supplied to said device.
Claim 8
Dependent Claim
177 words
An electronic temperature control circuit which provides an output control signal in direct relation to the temperature of a device being heated to cause a predetermined change in the temperature of said device, comprising: temperature sensing means attached to said device for providing an output signal proportional to the temperature sensed; means for generating a sweep voltage signal, which varies in a predetermined fashion between a first preselected voltage and a second preselected voltage over a preselected time period; first summing means having said temperature sensing means output signal and said sweep voltage signal operatively coupled thereto for summing said temperature sensing means output and sweep voltage signals to provide an error signal output, said error signal having an amplitude directly related to any deviation between said temperature sensing means output and said sweep voltage signals; second summing means having said error signal output and said sweep voltage signal operatively coupled thereto for summing said error and sweep voltage signals to provide a control signal output operative to control the amount of heat supplied to said device.
Claim 9
Dependent Claim
38 words
The circuit of claim 1 and further including; clamping means coupled between said sweep voltage signal generating means and said second summing means and operative to cause said sweep voltage signal to reach and maintain a predetermined limit.
Claim 10
Dependent Claim
39 words
The circuit of claim 6 and further including; clamping means operatively coupled between said sweep voltage signal generating means and said second summing means and operative to cause said sweep voltage signal to reach and maintain a predetermined limit.
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) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |