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GB959250A - Improvements in or relating to freezing point measuring apparatus - Google Patents

Improvements in or relating to freezing point measuring apparatus

Info

Publication number
GB959250A
GB959250A GB3356862A GB3356862A GB959250A GB 959250 A GB959250 A GB 959250A GB 3356862 A GB3356862 A GB 3356862A GB 3356862 A GB3356862 A GB 3356862A GB 959250 A GB959250 A GB 959250A
Authority
GB
United Kingdom
Prior art keywords
solution
freezing
thermistor
stylus
meter
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
GB3356862A
Inventor
Claude Lucarain
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of GB959250A publication Critical patent/GB959250A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
    • G01N25/04—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering of melting point; of freezing point; of softening point
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • G01N13/04—Investigating osmotic effects

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

959, 250. Measuring electrically. COMMISSARIAT A L'ENERGIE ATOMIQUE. Aug. 3, 1962 [Sept. 29, 1961], No. 33568/62. Heading G1N. A freezing-point measuring apparatus, suitable for use in determining the osmotic pressure of a solution 7, comprises a thermistor 2 of which the temperature sensitive element is located in a bulb at the extremity of an upwardly-directed pointed member, the test solution 7 being confined in a receptacle defined by the pointed member and a tubular element 6, e.g. of polythene, force-fitted around it. The thermistor is connected as one arm of a D.C. Wheatstone bridge, the output current of which is fed to a recording millivoltmeter 17. The test solution 7, which is protected by a drop of petroleum oil on its surface, is supercooled within a tube 9 as by a cooling gas provided by the evaporation of solid CO 2 10, until the stylus of meter 17 is deflected sufficiently to close switch 15, thus energizing an electromagnet 14. An armature 13 is thereby deflected downwards against the action of a spring 24, and a member 12 of wood impregnated with petroleum oil, on which crystals of ice have formed, is plunged into the solution 7, which then freezes, and the stylus of the meter 17, which is calibrated in units of osmotic pressure, returns to a position determined by the freezing-point of the solution. A method of calibrating the apparatus is disclosed in the Specification.
GB3356862A 1961-09-29 1962-08-31 Improvements in or relating to freezing point measuring apparatus Expired GB959250A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR874586A FR1308739A (en) 1961-09-29 1961-09-29 Improvements to devices for measuring the freezing temperature of a solution

Publications (1)

Publication Number Publication Date
GB959250A true GB959250A (en) 1964-05-27

Family

ID=8763800

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3356862A Expired GB959250A (en) 1961-09-29 1962-08-31 Improvements in or relating to freezing point measuring apparatus

Country Status (2)

Country Link
FR (1) FR1308739A (en)
GB (1) GB959250A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3367171A (en) * 1964-03-31 1968-02-06 Kobayashi Tomio Melting point measuring device
FR2436985A1 (en) * 1978-09-19 1980-04-18 Kyoto Daiichi Kagaku Kk METHOD AND APPARATUS FOR MEASURING THE LOWERING OF THE FREEZING TEMPERATURE OF A SOLUTION

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3367171A (en) * 1964-03-31 1968-02-06 Kobayashi Tomio Melting point measuring device
FR2436985A1 (en) * 1978-09-19 1980-04-18 Kyoto Daiichi Kagaku Kk METHOD AND APPARATUS FOR MEASURING THE LOWERING OF THE FREEZING TEMPERATURE OF A SOLUTION

Also Published As

Publication number Publication date
FR1308739A (en) 1962-11-09

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