CH585396A5 - Visible indication of temp. rise after cooling - uses flow of colourant across barrier broken by its expansion in solid state - Google Patents

Visible indication of temp. rise after cooling - uses flow of colourant across barrier broken by its expansion in solid state

Info

Publication number
CH585396A5
CH585396A5 CH1328874A CH1328874A CH585396A5 CH 585396 A5 CH585396 A5 CH 585396A5 CH 1328874 A CH1328874 A CH 1328874A CH 1328874 A CH1328874 A CH 1328874A CH 585396 A5 CH585396 A5 CH 585396A5
Authority
CH
Switzerland
Prior art keywords
colourant
cooling
temp
rise
expansion
Prior art date
Application number
CH1328874A
Original Assignee
Hughes Joseph Edward
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 Hughes Joseph Edward filed Critical Hughes Joseph Edward
Priority to CH1328874A priority Critical patent/CH585396A5/en
Publication of CH585396A5 publication Critical patent/CH585396A5/en

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

Landscapes

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

Abstract

The temperature indicator has a tubular body (10) closed at the lower end by a pointed section 12). The upper end is opened out (14) and two compartments (24a, 24b) are formed by a seal (26) which is ultrasonically welded when the lower compartment has been filled with a colourant. The upper compartment (24b) is sealed by a convex cap (16) after filling with an opaque absorbant. Cooling the device freezes the colourant which expands and breaks the partition. If the temp subsequently exceeds the melting point of the colourant, it flows into the absorbant and becomes visible.
CH1328874A 1974-10-02 1974-10-02 Visible indication of temp. rise after cooling - uses flow of colourant across barrier broken by its expansion in solid state CH585396A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH1328874A CH585396A5 (en) 1974-10-02 1974-10-02 Visible indication of temp. rise after cooling - uses flow of colourant across barrier broken by its expansion in solid state

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1328874A CH585396A5 (en) 1974-10-02 1974-10-02 Visible indication of temp. rise after cooling - uses flow of colourant across barrier broken by its expansion in solid state

Publications (1)

Publication Number Publication Date
CH585396A5 true CH585396A5 (en) 1977-02-28

Family

ID=4391094

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1328874A CH585396A5 (en) 1974-10-02 1974-10-02 Visible indication of temp. rise after cooling - uses flow of colourant across barrier broken by its expansion in solid state

Country Status (1)

Country Link
CH (1) CH585396A5 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2449873A1 (en) * 1979-01-19 1980-09-19 Bagros Michel Temperature rise detectors for frozen food pack or chambers - involving use of fragile or porous glass or plastic vessels contg. liq. dye
FR2558346A1 (en) * 1984-01-20 1985-07-26 Roget Bernard Visual indicator of the critical and actual temperature within a frozen, deep-frozen (quick-frozen) or similar product and its method of operation
FR2625556A1 (en) * 1988-01-05 1989-07-07 Guitteny Serge Device for indicating whether a frozen or deep frozen product has been kept under good conditions

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2449873A1 (en) * 1979-01-19 1980-09-19 Bagros Michel Temperature rise detectors for frozen food pack or chambers - involving use of fragile or porous glass or plastic vessels contg. liq. dye
FR2558346A1 (en) * 1984-01-20 1985-07-26 Roget Bernard Visual indicator of the critical and actual temperature within a frozen, deep-frozen (quick-frozen) or similar product and its method of operation
FR2625556A1 (en) * 1988-01-05 1989-07-07 Guitteny Serge Device for indicating whether a frozen or deep frozen product has been kept under good conditions

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Legal Events

Date Code Title Description
PL Patent ceased