GB281341A - Improvements in or relating to thermometers - Google Patents
Improvements in or relating to thermometersInfo
- Publication number
- GB281341A GB281341A GB32085/27A GB3208527A GB281341A GB 281341 A GB281341 A GB 281341A GB 32085/27 A GB32085/27 A GB 32085/27A GB 3208527 A GB3208527 A GB 3208527A GB 281341 A GB281341 A GB 281341A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- casing
- plunger
- resistance
- furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K5/00—Measuring temperature based on the expansion or contraction of a material
- G01K5/48—Measuring temperature based on the expansion or contraction of a material the material being a solid
- G01K5/56—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
281,341. Electroflo Meters Co., Ltd., (Assignees of Republic Flow Meters Co.). Nov. 29, 1926, [Convention date]. Thermometers. - A temperature-responsive device operating by the differential expansion of solids is caused to vary the resistance of an electric circuit including indicating and/or recording instruments. The temperature-responsive device within the furnace &c. 38 comprises coaxial tubes 34, 39 having different coefficients of expansion and connected together at one end by a pin &c. 42. The tube 34 extends to the indicator while the tube 39 is joined to a rod 40, preferably of the same material as the tube 34. The rod 40 is clamped at its outer end by screws 41 to a tube 35 extending between the furnace and the casing 10 containing the indicating means and the outer end of the tube 34 is arranged to actuate the indicator. The casing 10 contains a cup 11 to which it is connected electrically, and the cup receives a hollow plunger 12 of insulating material which rests on mercury 13. Secured within the hollow part of the plunger is a rod 15 on which is wound resistance 16 to the upper end of which is con nected to a terminal 18 mounted on but insu lated from the casing 10. Pivoted on a bracke 22 within the casing is a bell-crank lever 23 the horizontal arm of which carries an adjustable carrier 25 through which passes a screw 27 bear ing on the upper end of the plunger 12, while the vertical arm of the lever carries a screw 31 bearing on a plug 32 secured to the end of the tube 34. Expansion of the tube thus rotate! the lever 23 causing the plunger 12 to be de pressed into the cup 11 with consequent rise o: the mercury around the resistance 16. The varia tion in the resistance is indicated on a suitable instrument which may be graduated to read tem perature directly. A bye-pass tube 19 having a conducting wire 20 in its upper end may be con nected to the well 11 so that when the mercury reaches this wire a circuit is completed for sounding an alarm or for operating means for controlling the temperature within the furnace &c.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US281341XA | 1926-11-29 | 1926-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB281341A true GB281341A (en) | 1928-05-10 |
Family
ID=21841769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32085/27A Expired GB281341A (en) | 1926-11-29 | 1927-11-29 | Improvements in or relating to thermometers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB281341A (en) |
-
1927
- 1927-11-29 GB GB32085/27A patent/GB281341A/en not_active Expired
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