GB446319A - Improvements in or relating to means for testing temperatures - Google Patents
Improvements in or relating to means for testing temperaturesInfo
- Publication number
- GB446319A GB446319A GB2067135A GB2067135A GB446319A GB 446319 A GB446319 A GB 446319A GB 2067135 A GB2067135 A GB 2067135A GB 2067135 A GB2067135 A GB 2067135A GB 446319 A GB446319 A GB 446319A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phenol red
- red
- ion concentration
- receptacle
- chloro
- 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
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
446,319. Thermometers. CHAPMAN, A. W., 184, Tom Lane, Fulwood, Sheffield. July 20, 1935, No. 20671. [Class 97 (iii)] An aqueous solution, which is relatively stable at ordinary temperatures but undergoes a progressive change in hydrogen ion concentration at higher temperatures, and an indicator which progressively alters in colour as the hydrogen ion concentration varies are contained in a glass or other receptacle and indicate by their change in appearance whether or not a given temperature has been reached or the period during which it has been maintained. The test material may be an aqueous solution of ethylene chlorohydrin with a buffer salt such as disodium hydrogen phosphate or sodium borate to control the rate of variation in ion concentration, the indicating part comprising a mixture of the dyes aniline blue, alizarin red S, brilliant yellow and chloro-phenol red or phenol red. At normal temperatures the indicator is red but when heated becomes brown (if chloro-phenol red is used and orange in the case of phenol red), then yellow, then yellowish green and finally a bright green. A pellet or powder of fusible material may be included in the receptacle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2067135A GB446319A (en) | 1935-07-20 | 1935-07-20 | Improvements in or relating to means for testing temperatures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2067135A GB446319A (en) | 1935-07-20 | 1935-07-20 | Improvements in or relating to means for testing temperatures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB446319A true GB446319A (en) | 1936-04-28 |
Family
ID=10149734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2067135A Expired GB446319A (en) | 1935-07-20 | 1935-07-20 | Improvements in or relating to means for testing temperatures |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB446319A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2798855A (en) * | 1954-03-19 | 1957-07-09 | Baxter Don Inc | Sterilization indicator |
| US2798856A (en) * | 1954-03-19 | 1957-07-09 | Baxter Don Inc | Steam sterilization indicator |
| DE1184984B (en) * | 1960-11-30 | 1965-01-07 | Ilikon Corp | Heat load meter |
| GB2200449A (en) * | 1986-12-23 | 1988-08-03 | Scient Applied Research Sar | Temperature, temperature/time indicators |
| GB2299858A (en) * | 1995-04-08 | 1996-10-16 | Fraser Label Company Limited | Sterilisation indicator |
-
1935
- 1935-07-20 GB GB2067135A patent/GB446319A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2798855A (en) * | 1954-03-19 | 1957-07-09 | Baxter Don Inc | Sterilization indicator |
| US2798856A (en) * | 1954-03-19 | 1957-07-09 | Baxter Don Inc | Steam sterilization indicator |
| DE1184984B (en) * | 1960-11-30 | 1965-01-07 | Ilikon Corp | Heat load meter |
| GB2200449A (en) * | 1986-12-23 | 1988-08-03 | Scient Applied Research Sar | Temperature, temperature/time indicators |
| GB2299858A (en) * | 1995-04-08 | 1996-10-16 | Fraser Label Company Limited | Sterilisation indicator |
| GB2299858B (en) * | 1995-04-08 | 1998-10-21 | Fraser Label Company Limited | Indicator |
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