US3691840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature-measuring device
Assignee: LAB ASP
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Filing: 1971-01-19
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Granted: 1972-09-19
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Expires: 1991-01-19
Abstract
Abstract In a device for measuring the temperature of a wall, a gas is fed at a given pressure and flow rate into a collector having an annular end-plate provided with passageways, there being formed between the end-plate and the wall a narrow space in which a fraction of the gas injected through the passageways is heated in contact with the wall. A suction duct is located in the axis of the supply pipe for recirculating said gas fraction. The remainder of the injected gas is continuously driven outwards over the entire periphery of the annular end-plate and forms a gaseous guard ring. One or more thermocouples are placed in the suction duct for measuring the temperature of the gas in contact with the wall and one or more thermocouples are placed in the supply gas stream upstream of the annular end-plate, the function of said thermocouples being to permit direct and differential measurements.
Inventors
- 👤 Jacques Dufour
- 👤 Paul H Perroud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:27
CPC Classifications
G; G01; G01K; G01K13/00; G01K13/02; G01K13/022
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
244 words
A device for measuring the temperature of a wall and especially a metallic wall, wherein said device comprises a collector, a flat annular end plate for said collector, a pipe through which a gas is supplied at a given pressure and flow rate into said collector having a flared shape and closed by said flat annular end-plate which is parallel to the wall and provided with a series of gas-admission passageways, a suction duct, said annUlar end-plate being such as to delimit with the wall an intermediate space of small width in which a fraction of the gas flow which is injected through the passageways of the annular end-plate circulates radially while being heated in contact with the wall and is recirculated through said suction duct, said suction duct being located in the axis of the supply pipe which collects said fraction of gas substantially at the center of the intermediate space, the remainder of the injected gas being continuously driven towards the exterior and over the entire periphery of the annular end-plate while forming a gaseous guard ring, at least one thermocouple placed in the suction duct for measuring the temperature attained by the gas in contact with the wall and at least one thermocouple placed in the supply gas stream in the vicinity of the annular end-plate prior to injection of said gas into the intermediate space through the passageways, the function of said thermocouples being to permit direct and differential measurements.
Claim 2
Independent Claim
244 words
A device for measuring the temperature of a wall and especially a metallic wall, wherein said device comprises a collector, a flat annular end plate for said collector, a pipe through which a gas is supplied at a given pressure and flow rate into said collector having a flared shape and closed by said flat annular end-plate which is parallel to the wall and provided with a series of gas-admission passageways, a suction duct, said annUlar end-plate being such as to delimit with the wall an intermediate space of small width in which a fraction of the gas flow which is injected through the passageways of the annular end-plate circulates radially while being heated in contact with the wall and is recirculated through said suction duct, said suction duct being located in the axis of the supply pipe which collects said fraction of gas substantially at the center of the intermediate space, the remainder of the injected gas being continuously driven towards the exterior and over the entire periphery of the annular end-plate while forming a gaseous guard ring, at least one thermocouple placed in the suction duct for measuring the temperature attained by the gas in contact with the wall and at least one thermocouple placed in the supply gas stream in the vicinity of the annular end-plate prior to injection of said gas into the intermediate space through the passageways, the function of said thermocouples being to permit direct and differential measurements.
Claim 3
Dependent Claim
69 words
A measuring device according to claim 1, wherein said device has a cylindrical body which surrounds the gas supply pipe as well as the flared collector and the suction duct, said body being provided with an outer jacket which is cooled by a circulation of coolant liquid, the regions which are left free between the outer jacket, the supply pipe and the suction duct being filled with heat-insulating material.
Claim 4
Dependent Claim
58 words
A measuring device according to claim 1, wherein the extremity of the suction duct which is remote from the wall is associated with a recycling injector, the gas which is collected within the duct being drawn into said injector and returned into the collector to be mixed therein with the supply gas which is delivered through the pipe.
Claim 5
Dependent Claim
71 words
A measuring device according to claim 1, wherein the flared collector is formed of a double casing having a conical shape, the space for circulating the gas discharged from the passageways formed in the annular end-plate which closes the collector being delimited in the central region of said space by a disc of refractory material which is parallel to the wall and rigidly fixed to the extremity of the suction duct.
Claim 6
Dependent Claim
42 words
A measuring device according to claim 1, wherein the supply pipe comprises a gas preheating unit having variable efficiency which serves to adjust the temperature of said gas prior to injection into the intermediate space through the passageways of the annular end-plate.
Claim 7
Dependent Claim
24 words
A measuring device according to claim 1, wherein the supply pipe comprises a spirally coiled section in order to permit of differential expansion processes.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |