GB2284265A - A boiling point indicating device - Google Patents
A boiling point indicating device Download PDFInfo
- Publication number
- GB2284265A GB2284265A GB9324301A GB9324301A GB2284265A GB 2284265 A GB2284265 A GB 2284265A GB 9324301 A GB9324301 A GB 9324301A GB 9324301 A GB9324301 A GB 9324301A GB 2284265 A GB2284265 A GB 2284265A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- receptacle
- temperature
- heating
- boiling point
- 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.)
- Granted
Links
- 238000009835 boiling Methods 0.000 title claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims description 2
- 230000004044 response Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 14
- 239000000523 sample Substances 0.000 abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 2
- 238000011514 vinification Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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
- G01N25/08—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering of boiling point
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/02—Food
- G01N33/14—Beverages
- G01N33/146—Beverages containing alcohol
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
A device (10) for indicating the temperature at which a liquid boils comprises a receptacle (18) for the liquid, heating means (25) for heating the liquid when in the receptacle (18), sensor means (23) for detecting vibrations of the liquid when boiling in the receptacle (18) and temperature responsive means for measuring the temperature of the liquid. The arrangement is such that when the liquid boils the vibrations of the liquid are detected by the sensor means (23) and the temperature responsive means is activated to provide a measure of the boiling point of the liquid. The device shown is a probe for partial insertion in a brake fluid reservoir, the receptacle (18) being a capillary tube. Use in wine making for determination of alcohol content is also envisaged. <IMAGE>
Description
A Temperature Indicating Device
This invention relates to a temperature indicating device for indicating the temperature at which a liquid boils.
According to the present invention, there is provided a temperature indicating device for indicating the temperature at which a liquid boils comprising a receptacle for containing the liquid, heating means for heating the liquid when in the receptacle, sensor means for detecting vibration of the liquid when boiling in the receptacle and temperature responsive means operable in response to signals received from the sensor means whereby, on detection of vibration of the liquid in the receptacle, the temperature responsive means is activated to provide signals indicative of temperature of the liquid.
Following is a description, with reference to the accompanying drawing, of one method of carrying out the invention.
The drawing is a schematic diagram, shown partly in cross section, of a probe of one embodiment of a temperature indicating device in accordance with the present invention.
Referring to the drawing, there is shown a probe 10 comprising a cylindrical chamber 11 an upper end portion of which has secured thereto a housing 12 and a lower end portion of which is closed by an end wall 13. A circumferential wall 14 of the chamber 11 is provided with a plurality of slots 15 extending in a circumferential direction of the wall 14 adjacent the end wall 13. A base 16 of the housing 12 has an aperture therein (not shown) through which extends a tubular member 17 having a narrow bore comprising a capillary tube 18.
An upper portion of the member 17 is provided with an external thread 19 which is engaged by a pair of nuts 20, 21 which locate the tubular member 17 relative to the base 16 of the housing 12 and coaxially of the chamber 11.
The tubular member 17 is provided with an external circumferential recess 22 in which is located a circumferential vibration/sound sensor 23 which is coaxial with the capillary tube 18. The sensor 23 includes an extension 24 for connecting the sensor 23 to a printed circuit board (not shown) located in the housing 12.
The tubular member 17 extends through a coaxial helical heating element 25, an upper extension 26 of which is secured relative to the chamber 11 and which is adapted to be connected to the printed circuit board.
The printed circuit board also has connected thereto a thermistor (not shown), which extends into the capillary tube 18, a microprocessor (not shown) and a programmable read only memory EPROM (not shown), each of which components are connected one to another in a circuit which is adapted to receive electrical power and which includes a display (not shown) forming a closure panel for the housing 12.
An application of the device is in the testing of brake fluid of motor vehicles. When brake fluid, due to hygroscopic characteristics, absorbs moisture the boiling point of the fluid is reduced. The boiling point of a good quality brake fluid over a period of two years could reduce from 260"C to 1600C due to absorption of moisture. The device according to the invention can be used to determine the boiling point of brake fluid and thereby indicate whether deterioration is within an acceptable range by comparing measured temperature of the fluid with a predetermined value.
In carrying out such tests, the probe 10 is partially inserted into a reservoir of brake fluid so that a proportion of the fluid enters the chamber 11 through the slots 15 and is drawn upwardly through the capillary tube 18 by capillary action.
The fluid in the tube 18 is heated by the heating element 25.
When the fluid in the tube 18 boils and vibrates in the tube 18, the vibrations are sensed by the sensor 23 in consequence of which a signal is generated in the electrical circuit which controls operation of the thermistor and a signal issues indicative of the temperature of the fluid in the tube 18 at the instant that the fluid boils. The processor may be programmed to process the signal and operate a display which may indicate the temperature and/or whether the fluid under test has deteriorated beyond an acceptable condition.
It will be appreciated that the liquid in the chamber 11 is not affected since all testing occurs only in the capillary tube 18.
It will also be appreciated that a device in accordance with the present invention may be used in other applications. For example, the device may be used in wine making where the boiling point is directly proportional to the alcohol content.
Claims (6)
1. A temperature indicating device for indicating the
temperature at which a liquid boils comprising a
receptacle for containing the liquid, heating means for
heating the liquid when in the receptacle, sensor means
for detecting vibration of the liquid when boiling in the
receptacle and temperature responsive means operable in
response to signals received from the sensor means
whereby, on detection of vibration of the liquid in the
receptacle, the temperature responsive means is activated
to provide signals indicative of temperature of the
liquid.
2. A device as claimed in Claim 1 wherein the temperature
responsive means is included in an electrical circuit
which also includes means for processing the signals
provided by the temperature responsive means.
3. A device as claimed in Claim 1 or Claim 2 wherein
receptacle comprises a capillary tube.
4. A device as claimed in claim 3 wherein the heating means
and the sensor means are coaxial with the capillary tube.
5. A device as claimed in any one of the preceding Claims
wherein the receptacle, the heating means and the sensor
means are located in a chamber adapted to receive the
liquid.
6. A temperature indicating device substantially as
hereinbefore described and as illustrated in the
accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9324301A GB2284265B (en) | 1993-11-25 | 1993-11-25 | A temperature indicating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9324301A GB2284265B (en) | 1993-11-25 | 1993-11-25 | A temperature indicating device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9324301D0 GB9324301D0 (en) | 1994-01-12 |
| GB2284265A true GB2284265A (en) | 1995-05-31 |
| GB2284265B GB2284265B (en) | 1997-05-14 |
Family
ID=10745720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9324301A Expired - Fee Related GB2284265B (en) | 1993-11-25 | 1993-11-25 | A temperature indicating device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2284265B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2286461B (en) * | 1994-02-12 | 1998-01-28 | Julian Russell Poyner | Method and apparatus for the determination of the boiling point of a fluid |
| WO1999016651A1 (en) * | 1997-10-01 | 1999-04-08 | Continental Teves Ag & Co. Ohg | Hydraulic automobile brake system |
| DE19945928C1 (en) * | 1999-09-24 | 2001-06-21 | Siemens Ag | Determination of the alcohol concentration in the electrolyte of fuel cells |
-
1993
- 1993-11-25 GB GB9324301A patent/GB2284265B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2286461B (en) * | 1994-02-12 | 1998-01-28 | Julian Russell Poyner | Method and apparatus for the determination of the boiling point of a fluid |
| WO1999016651A1 (en) * | 1997-10-01 | 1999-04-08 | Continental Teves Ag & Co. Ohg | Hydraulic automobile brake system |
| DE19945928C1 (en) * | 1999-09-24 | 2001-06-21 | Siemens Ag | Determination of the alcohol concentration in the electrolyte of fuel cells |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2284265B (en) | 1997-05-14 |
| GB9324301D0 (en) | 1994-01-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19991125 |