GB903967A - A visual temperature-history indicator - Google Patents
A visual temperature-history indicatorInfo
- Publication number
- GB903967A GB903967A GB990061A GB990061A GB903967A GB 903967 A GB903967 A GB 903967A GB 990061 A GB990061 A GB 990061A GB 990061 A GB990061 A GB 990061A GB 903967 A GB903967 A GB 903967A
- Authority
- GB
- United Kingdom
- Prior art keywords
- impregnated
- paper
- temperature
- electrolyte
- hydroxyl ions
- 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
- G01K11/06—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using melting, freezing, or softening
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/02—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values
- G01K3/04—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values in respect of time
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Storage Of Fruits Or Vegetables (AREA)
- Freezing, Cooling And Drying Of Foods (AREA)
Abstract
903,967. Thermometers. MINNEAPOLISHONEYWELL REGULATOR CO. March 17, 1961, No. 9900/61. Class 97 (3). An indicator for showing the temperature history of a frozen food package or other article comprises a piece of filter or blotting paper 11 impregnated with an electrolyte such as an aqueous eutectic solution of potassium chloride and having a pair of dissimilar mutually-spaced metal electrodes 12, 13 such as of copper and tin, in contact therewith to form a galvanic cell, the arrangement being such that below a predetermined temperature substantially no change occurs, but above that temperature path migration of the hydroxyl ions or other product of the electrolytic action which takes place, progressively indicates the integrated time-temperature history of the article. As shown, the electrolyte is contained within a glass via 15 so that on freezing, the vial is ruptured and on subsequent thawing the paper 11 is impregnated, electrolytic action ensues and the mobility of the hydroxyl ions is indicated by a colour change in the phenolphthalein with which the paper 11 is impregnated.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB990061A GB903967A (en) | 1961-03-17 | 1961-03-17 | A visual temperature-history indicator |
| BE609256A BE609256A (en) | 1960-10-18 | 1961-10-17 | Improvements in shuttle adjusters and the like for looms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB990061A GB903967A (en) | 1961-03-17 | 1961-03-17 | A visual temperature-history indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB903967A true GB903967A (en) | 1962-08-22 |
Family
ID=9880876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB990061A Expired GB903967A (en) | 1960-10-18 | 1961-03-17 | A visual temperature-history indicator |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB903967A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4804275A (en) * | 1985-08-29 | 1989-02-14 | Johnson Matthey Public Limited Company | Indicator device for indicating the time integral of a monitored parameter |
| EP1862786A1 (en) | 2006-05-30 | 2007-12-05 | Acreo AB | Device, kit and method for monitoring a parameter history |
| US7731419B2 (en) | 2006-05-30 | 2010-06-08 | Acreo Ab | Device, kit and method for monitoring a parameter history |
| CN108709659A (en) * | 2018-06-14 | 2018-10-26 | 国网河南省电力公司平顶山供电公司 | A kind of tin alloy thermometric coating spraying technique |
-
1961
- 1961-03-17 GB GB990061A patent/GB903967A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4804275A (en) * | 1985-08-29 | 1989-02-14 | Johnson Matthey Public Limited Company | Indicator device for indicating the time integral of a monitored parameter |
| EP1862786A1 (en) | 2006-05-30 | 2007-12-05 | Acreo AB | Device, kit and method for monitoring a parameter history |
| US7731419B2 (en) | 2006-05-30 | 2010-06-08 | Acreo Ab | Device, kit and method for monitoring a parameter history |
| CN108709659A (en) * | 2018-06-14 | 2018-10-26 | 国网河南省电力公司平顶山供电公司 | A kind of tin alloy thermometric coating spraying technique |
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