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US3435170A - Device for heating chemical reagents - Google Patents

Device for heating chemical reagents Download PDF

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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
Application number
US558099A
Other languages
English (en)
Inventor
Kai Robert Smith
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.)
Autokemi AB
Original Assignee
Autokemi AB
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 Autokemi AB filed Critical Autokemi AB
Application granted granted Critical
Publication of US3435170A publication Critical patent/US3435170A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Patch Boards (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
US558099A 1965-06-22 1966-06-16 Device for heating chemical reagents Expired - Lifetime US3435170A (en)

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 (zh)
BE (1) BE682822A (zh)
DK (2) DK113677B (zh)
FI (1) FI41877C (zh)
FR (1) FR1484905A (zh)
GB (1) GB1100167A (zh)
NO (1) NO115193B (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
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 (fr) * 1992-05-29 1993-12-03 Nicolet Instrument Corp Dispositif de préchauffage d'échantillons de produits liquides contenus dans des flacons, avant le dégagement desdits flacons vers une zone de prélèvement.
US5350901A (en) * 1992-07-27 1994-09-27 Nikko Corporation Ltd. Electromagnetic induction steam generator
WO2016146928A1 (fr) 2015-03-16 2016-09-22 Chopin Technologies Système de test comprenant un dispositif de chauffage et procédé de mise en oeuvre d'un système de test

Citations (4)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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 (fr) * 1992-05-29 1993-12-03 Nicolet Instrument Corp Dispositif de préchauffage d'échantillons de produits liquides contenus dans des flacons, avant le dégagement desdits flacons vers une zone de prélèvement.
WO1993024233A1 (fr) * 1992-05-29 1993-12-09 Nicolet Instrument Corporation Dispositif de prechauffage d'echantillons de produits liquides contenus dans des flacons
US5350901A (en) * 1992-07-27 1994-09-27 Nikko Corporation Ltd. Electromagnetic induction steam generator
WO2016146928A1 (fr) 2015-03-16 2016-09-22 Chopin Technologies Système de test comprenant un dispositif de chauffage et procédé de mise en oeuvre d'un système de test

Also Published As

Publication number Publication date
DK113677B (da) 1969-04-14
BE682822A (zh) 1966-12-01
NO115193B (zh) 1968-08-26
GB1100167A (en) 1968-01-24
FI41877C (fi) 1970-03-10
DK113677A (zh)
FR1484905A (fr) 1967-06-16
FI41877B (zh) 1969-12-01

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