GB492093A - Improvements in or relating to electrical resistance thermometers - Google Patents
Improvements in or relating to electrical resistance thermometersInfo
- Publication number
- GB492093A GB492093A GB1183738A GB1183738A GB492093A GB 492093 A GB492093 A GB 492093A GB 1183738 A GB1183738 A GB 1183738A GB 1183738 A GB1183738 A GB 1183738A GB 492093 A GB492093 A GB 492093A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sheath
- helix
- refractory
- wire
- resistance wire
- 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
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Thermistors And Varistors (AREA)
Abstract
492,093. Wire resistances. PONT, J. S., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. Jan. 3, 1938, No. 118/37. [Class 37] A resistance thermometer for use at high temperatures such as 500- 1000‹ C. consists of an open helix 2 of platinum or other resistance wire housed in a refractory sheath 8, the ends of the helix being attached to thicker lead-in wires. 5, 6. The resistance wire is first closely wound on a former ; it is then removed from the former and its ends are attached to the lead-in wires. The helix is then inserted into a refractory sheath, which is of material having little or no free silica, such as sillimanite, porcelain, or recrystallized alumina. The helix is stretched during or after introduction into the sheath, so as to separate the turns, and may then be annealed. The interior of the sheath is then packed with a refractory cement which does not attack the resistance wire at high temperatures, for example alumina or zirconia cement. The refractory sheath may have a single channel as shown in Fig. 2 or two parallel channels as shown in Fig. 4, the middle portion of the helix being pulled out as shown at 11. Alternatively this portion may remain undistorted or the helix may be divided and the portions joined by a thicker wire. Compensating leads 12, 13, Fig. 4, may be provided in a sheath 14 located in a central passage of the sheath 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1183738A GB492093A (en) | 1938-01-03 | 1938-01-03 | Improvements in or relating to electrical resistance thermometers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1183738A GB492093A (en) | 1938-01-03 | 1938-01-03 | Improvements in or relating to electrical resistance thermometers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB492093A true GB492093A (en) | 1938-09-15 |
Family
ID=9993615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1183738A Expired GB492093A (en) | 1938-01-03 | 1938-01-03 | Improvements in or relating to electrical resistance thermometers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB492093A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE939412C (en) * | 1952-03-29 | 1956-02-23 | Heraeus Gmbh W C | Resistance thermometer for high temperatures and process for its manufacture |
-
1938
- 1938-01-03 GB GB1183738A patent/GB492093A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE939412C (en) * | 1952-03-29 | 1956-02-23 | Heraeus Gmbh W C | Resistance thermometer for high temperatures and process for its manufacture |
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