GB904846A - Improvements relating to temperature-indicating devices - Google Patents

Improvements relating to temperature-indicating devices

Info

Publication number
GB904846A
GB904846A GB218860A GB218860A GB904846A GB 904846 A GB904846 A GB 904846A GB 218860 A GB218860 A GB 218860A GB 218860 A GB218860 A GB 218860A GB 904846 A GB904846 A GB 904846A
Authority
GB
United Kingdom
Prior art keywords
liquids
separator
temperature
compartments
melting
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
Application number
GB218860A
Inventor
Donald Laurence Nicol
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB218860A priority Critical patent/GB904846A/en
Publication of GB904846A publication Critical patent/GB904846A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

904,846. Temperature Indicators. NATIONAL RESEARCH DEVELOPMENT CORPORATION. March 14, 1961 [Jan. 21, 1960; Oct. 15, 1960], Nos. 2188/60 and 35426/60. Class 97 (3). A temperature-indicating device comprises a closed transparent P.V.C. tube 15 divided into compartments by a separator 12 which melts when the temperature of the device rises to a given value, thus allowing the liquids 11, 14 to mix and produce a substantially permanent coloration, dissimilar from any coloration when the liquids are separated, the separator being insoluble in and non- reactive with the liquids which it separates. Preferably a flocculent precipitate is formed when the two liquids mix so as to prevent leaks through the separator as well as to be clearly visible. The P.V.C. tube 15 has a glass lining 10 with which the separator makes good contact. A ball-bearing or glass bead 13 is included in the separator 12 to ensure mixing of the liquids 11, 14 when the separator melts. A comparison spot of the same colour as the liquids after mixing is provided at 17. If several temperatures are to be indicated several different separators arranged in order of their melting-points are used with one liquid in the first compartment and the other liquid in the other compartments, the extent of the colouring then indicating how high the temperature has risen. Ethyl alcohol and/or ethylene glycol may be added to the liquids as an " antifreeze " if the temperatures to be indicated are below or near ice point. Various examples of combinations of liquids and the resulting colour and possible separators with their melting-points are given.
GB218860A 1960-01-21 1960-01-21 Improvements relating to temperature-indicating devices Expired GB904846A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB218860A GB904846A (en) 1960-01-21 1960-01-21 Improvements relating to temperature-indicating devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB218860A GB904846A (en) 1960-01-21 1960-01-21 Improvements relating to temperature-indicating devices

Publications (1)

Publication Number Publication Date
GB904846A true GB904846A (en) 1962-08-29

Family

ID=9735132

Family Applications (1)

Application Number Title Priority Date Filing Date
GB218860A Expired GB904846A (en) 1960-01-21 1960-01-21 Improvements relating to temperature-indicating devices

Country Status (1)

Country Link
GB (1) GB904846A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4232552A (en) * 1978-09-28 1980-11-11 Akzona Incorporated Temperature indicating compositions of matter
US4339207A (en) * 1978-09-28 1982-07-13 Akzona Incorporated Temperature indicating compositions of matter
US4362645A (en) * 1978-09-28 1982-12-07 Akzona, Inc. Temperature indicating compositions of matter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4232552A (en) * 1978-09-28 1980-11-11 Akzona Incorporated Temperature indicating compositions of matter
US4339207A (en) * 1978-09-28 1982-07-13 Akzona Incorporated Temperature indicating compositions of matter
US4362645A (en) * 1978-09-28 1982-12-07 Akzona, Inc. Temperature indicating compositions of matter

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