US3720103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat flux measuring system
Assignee: Calspan Corp
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Filing: 1970-11-03
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Granted: 1973-03-13
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Expires: 1990-11-03
Abstract
Abstract A heat flux meter having thermocouples responsive to temperature differentials between two similar surfaces, the heat flux to one of which is to be determined, a first heater responsive to the thermocouples for heating the other surface, a second heater responsive to temperature differences between it and the first heater to prevent heat flow away from the other surface and a reflective shield for preventing environmental heat flow to the other surface.
Inventors
- 👤 D Adams
- 👤 F Vassallo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:47
CPC Classifications
G; G01; G01K; G01K17/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
A thermal flux meter, comprising; a. first temperature sensing means for generating a first signal responsive to the heat input to a first surface, b. second temperature sensing means for generating a second signal responsive to the heat input to a second surface which is similar to said first surface, c. first heating means for applying heat to said first surface in response to the difference between said first and second signals, d. means for preventing heat flow to said first surface from the environment and for preventing heat flow from said first heating means to the environment including second heating means responsive to the temperature difference between said first heating means, and the second heating means and further including reflective means for shielding said first surface from the environment, e. said last mentioned means is spaced from said second surface whereby heat flow can occur directly between the environment and said second surface.
Claim 2
Dependent Claim
154 words
A thermal flux meter, comprising; a. first temperature sensing means for generating a first signal responsive to the heat input to a first surface, b. second temperature sensing means for generating a second signal responsive to the heat input to a second surface which is similar to said first surface, c. first heating means for applying heat to said first surface in response to the difference between said first and second signals, d. means for preventing heat flow to said first surface from the environment and for preventing heat flow from said first heating means to the environment including second heating means responsive to the temperature difference between said first heating means, and the second heating means and further including reflective means for shielding said first surface from the environment, e. said last mentioned means is spaced from said second surface whereby heat flow can occur directly between the environment and said second surface.
Claim 3
Dependent Claim
154 words
A thermal flux meter, comprising; a. first temperature sensing means for generating a first signal responsive to the heat input to a first surface, b. second temperature sensing means for generating a second signal responsive to the heat input to a second surface which is similar to said first surface, c. first heating means for applying heat to said first surface in response to the difference between said first and second signals, d. means for preventing heat flow to said first surface from the environment and for preventing heat flow from said first heating means to the environment including second heating means responsive to the temperature difference between said first heating means, and the second heating means and further including reflective means for shielding said first surface from the environment, e. said last mentioned means is spaced from said second surface whereby heat flow can occur directly between the environment and said second surface.
Claim 4
Dependent Claim
154 words
A thermal flux meter, comprising; a. first temperature sensing means for generating a first signal responsive to the heat input to a first surface, b. second temperature sensing means for generating a second signal responsive to the heat input to a second surface which is similar to said first surface, c. first heating means for applying heat to said first surface in response to the difference between said first and second signals, d. means for preventing heat flow to said first surface from the environment and for preventing heat flow from said first heating means to the environment including second heating means responsive to the temperature difference between said first heating means, and the second heating means and further including reflective means for shielding said first surface from the environment, e. said last mentioned means is spaced from said second surface whereby heat flow can occur directly between the environment and said second surface.
Claim 5
Dependent Claim
46 words
The meter according to claim 1 wherein; f. said first heating means is secured to said first surface by an element of high thermal conductance, and g. said second heating means is secured to said first heating means by a second element of low thermal conductivity.
Claim 6
Dependent Claim
25 words
The meter according to claim 2, wherein; h. said first and second heating means include resistive heating elements, and i. said temperature sensors comprise thermocouples.
Claim 7
Dependent Claim
38 words
The meter according to claim 1, further comprising; f. means for controlling the heat output of said second heating means comprising third and fourth thermal sensing means responsive to temperature differential between said first and second heating means.
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |