US3435170A - Device for heating chemical reagents - Google Patents
Device for heating chemical reagents Download PDFInfo
- Publication number
- US3435170A US3435170A US558099A US3435170DA US3435170A US 3435170 A US3435170 A US 3435170A US 558099 A US558099 A US 558099A US 3435170D A US3435170D A US 3435170DA US 3435170 A US3435170 A US 3435170A
- Authority
- US
- United States
- Prior art keywords
- test tubes
- racks
- tube
- heating
- chemical reagents
- 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 - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 title description 12
- 239000003153 chemical reaction reagent Substances 0.000 title description 7
- 238000001816 cooling Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000004804 winding Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 240000005369 Alstonia scholaris Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/105—Induction heating apparatus, other than furnaces, for specific applications using a susceptor
- H05B6/108—Induction heating apparatus, other than furnaces, for specific applications using a susceptor for heating a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
Definitions
- a device for heating chemical reagents including a series of test tube racks sequentially movable in adjacency to a magnetic field creating means which includes a core and windings. Each rack is made of a material having high electrical conductivity so that an electric current is induced in the rack by the magnetic field so as to heat the rack and the test tubes contained therein.
- the present invention relates to a device for heating chemical reagents in automatic chemical analyzing machines having movable containers for the reagents which will be referred to below as test tubes. Analyzing machines of this type make it possible to analyze a great number of samples per unit time and to make a great number of different analyses on the individual samples.
- the analyses require that the samples have been heated, and it is of essential importance for the operation of the analyzing machine that heating can be performed swiftly and uniformly and to a degree that is adjustable in a controllable manner.
- the machine constructed according to the present invention which is based on having the reagents provided in test tubes, a number of test tubes being grouped together in a test tube rack.
- the test tube rack is of a material of good electrical conductivity and is adapted to enclose the test tubes substantially along the whole length thereof, means being provided for creating an alternating magnetic field and to make it pass through the test tube rack during certain time intervals for inducing therein an electrical current so as to cause heating of the test tube rack and of the contents of the test tubes.
- test tubes 1 are grouped together in a test tube rack 2, which is of a material having good electrical conductivity, such as aluminimum or copper.
- the racks are. constructed as solid blocks in which holes 3 have been provided of suitable dimension corresponding to those of the test tubes 1.
- the holes 3 are preferably of such a depth that the test tubes are enclosed by the rack 2 substantially along the entire length thereof.
- a feeding device of a known type which forms no part of the present invention and has therefore not been illustrated on the drawing, is provided to transport the tube rack 2 together with a number of racks 2', 2" etc. in front of a device for heating the tube racks as well as the contents of the test tubes.
- This device comprises a means for creating an alternating magnetic field which is adapted to pass through the tube rack during a certain time interval and to induce an electric current therein.
- This means comprises a core 4 having windings 5 and 6 thereon, to which is applied an AC. voltage from the terminals 7 of an AC. source not shown on the drawing.
- the arrangement provides for making the tube racks pass close to the core 4, whereby the alternating magnetic field, as indicated by arrows 8, is made to pass through the tube racks. This induces an electric current in the racks and causes heating of the same as well as of the contents of the test tubes.
- the degree of heating of the contents of the test tubes can be varied as desired in each particular case by varying the time during which the individual tube racks pass in front of the core 4 and by varying the strength of the alternating magnetic field.
- flanges 9 are provided at the bottom thereof.
- the flanges can be of arbitrary type and number, three flanges being provided on the tube racks in the embodiment shown.
- the construction of the tube racks described herein results, owing to the good heat-conductive property of the material, in low temperature differences between different part of the contents of the test tubes. Also, the tube racks have a large mass, which results in a large heat storage capacity, so that at the end of the heating period the temperature drops relatively slowly. In spite of this, a relatively rapid cooling can be provided with the aid of the cooling flanges if desired.
- a device for heating the contents of a plurality of test tubes comprising, a series of tube racks, means including a core and windings for creating an alternating magnetic field, said racks being sequentially movable to a position adjacent said magnetic field creating means, each of said tube racks comprising a block of material having high electrical conductivity and having a plurality of bores therein to receive test tubes whereby when each tube rack is moved to a position adjacent the magnetic field creating means an electric current is induced in the tube rack to heat the tube rack.
- a device according to claim 1 and further including flanges on each of said tube racks for cooling the racks.
- each of said tube racks has a large mass for large heat storage capacity.
Description
. March 25, 1969 K. R. SMITH 3,435,170
DEVICE FOR HEATING CHEMICAL REAGENTS Filed-June 16, 1966 ATTORNEYS United States Patent 3,435,170 DEVICE FOR HEATING CHEMICAL REAGENTS Kai Robert Smith, Lidingo, Sweden, assignor to AB Autokemi, Stockholm, Sweden, a corporation of Sweden Filed June 16, 1966, Ser. No. 558,099 Claims priority, application Sweden, June 22, 1965, 8,275/65 Int. Cl. H05b 5/08 U.S. Cl. 219-1049 3 Claims ABSTRACT OF THE DISCLOSURE A device for heating chemical reagents including a series of test tube racks sequentially movable in adjacency to a magnetic field creating means which includes a core and windings. Each rack is made of a material having high electrical conductivity so that an electric current is induced in the rack by the magnetic field so as to heat the rack and the test tubes contained therein.
The present invention relates to a device for heating chemical reagents in automatic chemical analyzing machines having movable containers for the reagents which will be referred to below as test tubes. Analyzing machines of this type make it possible to analyze a great number of samples per unit time and to make a great number of different analyses on the individual samples.
In some cases, the analyses require that the samples have been heated, and it is of essential importance for the operation of the analyzing machine that heating can be performed swiftly and uniformly and to a degree that is adjustable in a controllable manner.
These requirements are met by the machine constructed according to the present invention, which is based on having the reagents provided in test tubes, a number of test tubes being grouped together in a test tube rack. According to the invention the test tube rack is of a material of good electrical conductivity and is adapted to enclose the test tubes substantially along the whole length thereof, means being provided for creating an alternating magnetic field and to make it pass through the test tube rack during certain time intervals for inducing therein an electrical current so as to cause heating of the test tube rack and of the contents of the test tubes.
An embodiment of the invention is shown on the attached drawing.
A number of test tubes 1, in the present instance four, are grouped together in a test tube rack 2, which is of a material having good electrical conductivity, such as aluminimum or copper. Preferably, the racks are. constructed as solid blocks in which holes 3 have been provided of suitable dimension corresponding to those of the test tubes 1. The holes 3 are preferably of such a depth that the test tubes are enclosed by the rack 2 substantially along the entire length thereof.
A feeding device of a known type, which forms no part of the present invention and has therefore not been illustrated on the drawing, is provided to transport the tube rack 2 together with a number of racks 2', 2" etc. in front of a device for heating the tube racks as well as the contents of the test tubes. This device comprises a means for creating an alternating magnetic field which is adapted to pass through the tube rack during a certain time interval and to induce an electric current therein. This means comprises a core 4 having windings 5 and 6 thereon, to which is applied an AC. voltage from the terminals 7 of an AC. source not shown on the drawing.
The arrangement provides for making the tube racks pass close to the core 4, whereby the alternating magnetic field, as indicated by arrows 8, is made to pass through the tube racks. This induces an electric current in the racks and causes heating of the same as well as of the contents of the test tubes.
The degree of heating of the contents of the test tubes can be varied as desired in each particular case by varying the time during which the individual tube racks pass in front of the core 4 and by varying the strength of the alternating magnetic field.
When the contents of the test tubes have been heated in this way and some time has been allowed for a possible reaction to take place and for a reading to be made, it may be desirable to cause a comparatively rapid cooling of the tube rack and the contents of the test tubes. This is done preferably by lowering the lower part of the tube rack into a liquid, such as water, of suitable temperature. To make possible rapid cooling of the tube racks, flanges 9 are provided at the bottom thereof. The flanges can be of arbitrary type and number, three flanges being provided on the tube racks in the embodiment shown.
The construction of the tube racks described herein results, owing to the good heat-conductive property of the material, in low temperature differences between different part of the contents of the test tubes. Also, the tube racks have a large mass, which results in a large heat storage capacity, so that at the end of the heating period the temperature drops relatively slowly. In spite of this, a relatively rapid cooling can be provided with the aid of the cooling flanges if desired.
What is claimed is:
1. A device for heating the contents of a plurality of test tubes comprising, a series of tube racks, means including a core and windings for creating an alternating magnetic field, said racks being sequentially movable to a position adjacent said magnetic field creating means, each of said tube racks comprising a block of material having high electrical conductivity and having a plurality of bores therein to receive test tubes whereby when each tube rack is moved to a position adjacent the magnetic field creating means an electric current is induced in the tube rack to heat the tube rack.
2. A device according to claim 1 and further including flanges on each of said tube racks for cooling the racks.
3. A device according to claim 1 wherein each of said tube racks has a large mass for large heat storage capacity.
References Cited UNITED STATES PATENTS 1,515,593 11/1924 Elsdon-Dew et al. 219-1049 1,691,562 11/1928 Bissell 219l0.49 1,821,530 9/1931 Spire 219-1049 2,901,583 8/1959 Klooz 219-1049 RICHARD M. WOOD, Primary Examiner. L. H. BENDER, Assistant Examiner.
U.S. Cl. X.R. 219-1051
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE827565 | 1965-06-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3435170A true US3435170A (en) | 1969-03-25 |
Family
ID=20273619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US558099A Expired - Lifetime US3435170A (en) | 1965-06-22 | 1966-06-16 | Device for heating chemical reagents |
Country Status (7)
Country | Link |
---|---|
US (1) | US3435170A (en) |
BE (1) | BE682822A (en) |
DK (2) | DK113677B (en) |
FI (1) | FI41877C (en) |
FR (1) | FR1484905A (en) |
GB (1) | GB1100167A (en) |
NO (1) | NO115193B (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3620289A (en) * | 1968-08-05 | 1971-11-16 | United Aircraft Corp | Method for casting directionally solified articles |
AU608576B2 (en) * | 1987-02-06 | 1991-04-11 | Hansens Verkstader Ab | A method and an apparatus for heating liquid samples, and a container for use in the apparatus |
US5142115A (en) * | 1990-02-14 | 1992-08-25 | Kilo Alpha Co. | Apparatus for low resistance electric heating of electrically conductive containers |
US5248865A (en) * | 1989-12-18 | 1993-09-28 | Tyler George W | Apparatus for induction heating of bearings or the like |
FR2691803A1 (en) * | 1992-05-29 | 1993-12-03 | Nicolet Instrument Corp | Device for preheating samples of liquid products contained in flasks, before the release of said flasks to a sampling zone. |
US5350901A (en) * | 1992-07-27 | 1994-09-27 | Nikko Corporation Ltd. | Electromagnetic induction steam generator |
WO2016146928A1 (en) | 2015-03-16 | 2016-09-22 | Chopin Technologies | Test system comprising a heating device and method for implementing a test system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1515593A (en) * | 1923-01-13 | 1924-11-18 | Elsdon-Dew William | Heating rock-drill bits and the like |
US1691562A (en) * | 1926-11-17 | 1928-11-13 | Thompson Prod Inc | Apparatus for electrically heating metal parts |
US1821530A (en) * | 1927-12-01 | 1931-09-01 | Thompson Prod Inc | Induction heater |
US2901583A (en) * | 1956-08-17 | 1959-08-25 | Holo Krome Screw Corp | Forging apparatus and stock warming means therefor |
-
0
- DK DK113677D patent/DK113677A/da unknown
-
1966
- 1966-06-10 NO NO163381A patent/NO115193B/no unknown
- 1966-06-16 US US558099A patent/US3435170A/en not_active Expired - Lifetime
- 1966-06-16 GB GB26848/66A patent/GB1100167A/en not_active Expired
- 1966-06-20 BE BE682822D patent/BE682822A/xx unknown
- 1966-06-21 FR FR66287A patent/FR1484905A/en not_active Expired
- 1966-06-22 FI FI661665A patent/FI41877C/en active
- 1966-06-22 DK DK322566AA patent/DK113677B/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1515593A (en) * | 1923-01-13 | 1924-11-18 | Elsdon-Dew William | Heating rock-drill bits and the like |
US1691562A (en) * | 1926-11-17 | 1928-11-13 | Thompson Prod Inc | Apparatus for electrically heating metal parts |
US1821530A (en) * | 1927-12-01 | 1931-09-01 | Thompson Prod Inc | Induction heater |
US2901583A (en) * | 1956-08-17 | 1959-08-25 | Holo Krome Screw Corp | Forging apparatus and stock warming means therefor |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3620289A (en) * | 1968-08-05 | 1971-11-16 | United Aircraft Corp | Method for casting directionally solified articles |
AU608576B2 (en) * | 1987-02-06 | 1991-04-11 | Hansens Verkstader Ab | A method and an apparatus for heating liquid samples, and a container for use in the apparatus |
US5248865A (en) * | 1989-12-18 | 1993-09-28 | Tyler George W | Apparatus for induction heating of bearings or the like |
US5142115A (en) * | 1990-02-14 | 1992-08-25 | Kilo Alpha Co. | Apparatus for low resistance electric heating of electrically conductive containers |
FR2691803A1 (en) * | 1992-05-29 | 1993-12-03 | Nicolet Instrument Corp | Device for preheating samples of liquid products contained in flasks, before the release of said flasks to a sampling zone. |
WO1993024233A1 (en) * | 1992-05-29 | 1993-12-09 | Nicolet Instrument Corporation | Device for preliminary heating of liquid product samples contained in small bottles |
US5350901A (en) * | 1992-07-27 | 1994-09-27 | Nikko Corporation Ltd. | Electromagnetic induction steam generator |
WO2016146928A1 (en) | 2015-03-16 | 2016-09-22 | Chopin Technologies | Test system comprising a heating device and method for implementing a test system |
Also Published As
Publication number | Publication date |
---|---|
DK113677A (en) | |
DK113677B (en) | 1969-04-14 |
BE682822A (en) | 1966-12-01 |
FR1484905A (en) | 1967-06-16 |
GB1100167A (en) | 1968-01-24 |
FI41877C (en) | 1970-03-10 |
FI41877B (en) | 1969-12-01 |
NO115193B (en) | 1968-08-26 |
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