US3645508A - Magnetic stirrer for conducting dielectric tests on insulating oils - Google Patents
Magnetic stirrer for conducting dielectric tests on insulating oils Download PDFInfo
- Publication number
- US3645508A US3645508A US43127A US3645508DA US3645508A US 3645508 A US3645508 A US 3645508A US 43127 A US43127 A US 43127A US 3645508D A US3645508D A US 3645508DA US 3645508 A US3645508 A US 3645508A
- Authority
- US
- United States
- Prior art keywords
- magnetic stirrer
- receptacle
- support
- container
- magnetic
- 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
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/226—Construction of measuring vessels; Electrodes therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
- B01F33/452—Magnetic mixers; Mixers with magnetically driven stirrers using independent floating stirring elements
Definitions
- FIG. I is a diagrammatic vertical axial section through a container according to the invention. While FIG. 2 is a view on a different scale of the rotating plate.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
Abstract
In a container for conducting dielectric tests on insulating oils, there is provided a stirring means consisting of a removable displaceable element equipped with a permanent magnet accommodated in the receptacle of said container and moved by a magnetic control means located outside said receptacle.
Description
United States Patent 1151 3,645,508
Balteau 51 Feb. 29, 11972 [54] MAGNETIC STIRRER FOR [56] Reierences Cited CONDUCTING DIELECTRIUC TESTS 0N INSULATING OILS UNITED STATES PATENTS 3,088,716 5/1963 sum ..259/D]G. 46 [721 Invent: Paul Balm", 37 Rue Musch, 3,116,913 l/l964 Laue ....259/108 4920 Embourg, Belgium 3,421,528 H1969 Gomez et al ..259/l08 [22] Filed: June 3, 1970 Primary Exammer-Patr1ck D. Lawson PP 43,127 Assistant Examiner-Geo. V. Larkin Attorney-Young & Thompson [30] Foreign Application Priority Data 57] ABSTRACT June 11, 1969 Belgium ..42306 In acontainer for conducting dielectric tests on insulating oils there is provided a stirring means consisting of a removable [52] "259/107 displaceable element equipped with a permanent magnet ac- [5 l a "Bolt 7/16 commodated in the receptacle of said container and moved by [58] Field of Search ..259/l07, 108, 5-8,
a magnetic control means located outside said receptacle. 259/16, 2l-24, 32-34, 40-44, 64-67, DIG. 46
5 Claims, 2 Drawing Figures lax Patented Feb. 29, 1972 MAGNETIC STIRRER FOR CONDUCTING DIELECTRIC TESTS ON INSULATING OILS This invention relates to a container equipped with a stirrer for stirring the liquid accommodated in the container. More particularly, the invention relates to a container suitable for conducting dielectric tests on insulating oils.
It is known that the oils used in certain electrical apparatus must have insulating properties which are determined by subjecting the oils to standardized dielectric tests.
To do this, a sample of oil to be tested is introduced into a container in which two electrodes are situated at a precisely regulated distance apart from one another. A voltage is applied between these two electrodes, being progressively increased until a spark is formed between the electrodes. The tests are repeated several times in succession and the results obtained are interpreted to give the value of the dielectric strength.
During each test, the oil is carbonized to a certain extent through the passage of the spark or the electric arc, resulting in the formation of residues and gas bubbles through which measurements taken during subsequent tests are in danger of being falsified. To avoid this disadvantage, the oil has to be suitably stirred or agitated to bring fresh oil between the electrodes.
Various systems have already been used for this purpose. In one known system, the container itself is agitated, in a second known system the electrodes are displaced while in a third known system the oil is suitably agitated by mechanical means such as a turbine or a propeller equipped with a mechanical control system driven by outside means.
It is also known that various chemical substances can be mixed by means of small cylinders of a magnetic metal covered with an enamel resistant to the action of chemicals which are rotated by a powerful magnet arranged beneath the container accommodating the product to be mixed, being driven by a motor.
Although these systems generally provide for adequate stirring, they do have various disadvantages. Firstly, they often give rise to the formation of bubbles during agitation. The parts near the electrodes are troublesome because they can disturb the test conditions. Finally, they are sometimes difficult to dismantle and clean so that the impurities and residues from the tests remain in the container.
The object of the present invention is to provide a container for conducting dielectric tests on insulating oils, comprising stirring means which do not disturb the test conditions and which consist of elements without deep cavities. These elements are made from the same material as the container and can readily be removed to allow quick and complete cleaning.
This object is achieved by a container according to the invention which is distinguished by the fact that the stirring means consists of a removable displaceable element equipped with a permanent magnet accommodated in the receptacle of the container and moved by a magnetic control means situated outside the receptacle of the container.
According to one aspect of the invention, the displaceable element is in the form of a rotatable circular plate provided with a shaft and equipped with a permanent magnet controlled by the magnetic control means. In this way, control can be effected by means of an electromagnet situated beneath the bowl of oil which does not have any moving parts. The pulsating current required for control can be supplied by means of a transistorized oscillator, while speed can be regulated very simply as required by acting on the characteristics of the control current.
According to another aspect of the invention, the ends of the shaft of the rotatable plate are supported by two bearings provided in the support accommodated in the bottom of the container. These two bearings comprise semicylindrical recesses at the periphery of said cavity.
In addition, the support for the rotating plate can alternatively be arranged directly in the bottom of the container receptacle which thus comprises a cavity for the plate, or in serted and arranged on the bottom of the container.
Other features of the invention Wlll be apparent from the following description of the accompanying drawings which relate to one purely exemplary embodiment of the invention.
FIG. I is a diagrammatic vertical axial section through a container according to the invention; while FIG. 2 is a view on a different scale of the rotating plate.
As can be seen, the container in question has a receptacle ll of cylindrical form covered by a closure 6 from which depend two electrodes 7. This receptacle has a base Ia on which a support 2 with a cavity 3 is arranged. This cavity accommodates a plate 4 which is a portion with a flat circular surface. This plate is provided with an element 4a in the form of a permanent magnet provided with a shaft 5 whose two ends or tnmnions 5a are carried by the two bearings 2a consisting of two semicylindrical recesses.
Outside the cylindrical receptacle I there is a known magnetic control means (not shown) which generates a rotating or pulsating magnetic field. This known device is advantageously in the form of an electromagnet situated at some distance beneath the container so that no large metal parts are able to exert any influence during the tests.
The magnetic field acts on the permanent magnet 40 and rotates the plate 4 accommodated in the cavity 3 which agitates the oil 8 accommodated in the container.
What I claim is:
ll. A magnetic stirrer comprising a receptacle for conducting dielectric tests on insulating oils comprising a support at the bottom of said receptacle, a rounded cavity provided in said support, a circular rotating plate accommodated in said cavity, and a magnetic element on said plate so as to rotate said plate in a magnetic driving field.
2. A magnetic stirrer according to claim 8 characterized in that the circular rotating plate is provided with a shaft the ends of which are carried by two bearings in said support.
3. A magnetic stirrer according to claim 9 characterized in that said two bearings consist of two semicylindrical recesses at the periphery of said cavity in said support.
4. A magnetic stirrer according to claim 8 characterized in that said support is constituted directly by a thick bottom of said receptacle.
5. A magnetic stirrer according to claim 8 characterized in that said support comprises a thick element inserted and located on the bottom of said receptacle.
Claims (5)
1. A magnetic stirrer comprising a receptacle for conducting dielectric tests on insulating oils comprising a support at the bottom of said receptacle, a rounded cavity provided in said support, a circular rotating plate accommodated in said cavity, and a magnetic element on said plate so as to rotate said plate in a magnetic driving field.
2. A magnetic stirrer according to claim 8 characterized in that the circular rotating plate is provided with a shaft the ends of which are carried by two bearings in said support.
3. A magnetic stirrer according to claim 9 characterized in that said two bearings consist of two semicylindrical recesses at the periphery of said cavity in said support.
4. A magnetic stirrer according to claim 8 characterized in that said support is constituted directly by a thick bottom of said receptacle.
5. A magnetic stirrer according to claim 8 characterized in that said support comprises a thick element inserted and located on the bottom of said receptacle.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE6042306 | 1969-06-11 | ||
BE734433 | 1969-06-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3645508A true US3645508A (en) | 1972-02-29 |
Family
ID=25656750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US43127A Expired - Lifetime US3645508A (en) | 1969-06-11 | 1970-06-03 | Magnetic stirrer for conducting dielectric tests on insulating oils |
Country Status (5)
Country | Link |
---|---|
US (1) | US3645508A (en) |
BE (1) | BE734433A (en) |
DE (1) | DE2028620A1 (en) |
FR (1) | FR2063882A5 (en) |
GB (1) | GB1311895A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4911556A (en) * | 1989-03-17 | 1990-03-27 | Lim Technology Laboratories, Inc. | Turbulent stirring unit |
US20050095159A1 (en) * | 2003-10-08 | 2005-05-05 | Nidec Corporation | Method of Manufacturing, Including Method of Inspecting, Fluid-Dynamic-Pressure Bearing Units |
US20090223824A1 (en) * | 2008-03-05 | 2009-09-10 | Kazufumi Oouchi | Stirring device, microbe testing device, and microbe testing method |
JP2009210488A (en) * | 2008-03-05 | 2009-09-17 | Panasonic Corp | Stirring device |
US10260036B2 (en) | 2014-10-17 | 2019-04-16 | Sani-Tech West, Inc. | Mixing and filtering system and method |
CN114130294A (en) * | 2021-12-13 | 2022-03-04 | 东莞职业技术学院 | Intelligent magnetic stirrer |
CN115946924A (en) * | 2023-02-13 | 2023-04-11 | 广东海洋大学 | Seafood prefabricated vegetable packaging device and packaging method thereof |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3641093A1 (en) * | 1986-12-02 | 1988-06-16 | Hoechst Ag | REAKTIONSGEFAESS |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3088716A (en) * | 1952-09-20 | 1963-05-07 | Nat Res Dev | Magnetic stirrers |
US3116913A (en) * | 1961-05-29 | 1964-01-07 | Lane Kingdon | Liquid agitating apparatus |
US3421528A (en) * | 1964-10-21 | 1969-01-14 | Ludgero S A Gomez | Denture cleaning device |
-
1969
- 1969-06-11 BE BE734433D patent/BE734433A/xx unknown
-
1970
- 1970-05-22 GB GB2389170A patent/GB1311895A/en not_active Expired
- 1970-05-29 FR FR7019679A patent/FR2063882A5/fr not_active Expired
- 1970-06-03 US US43127A patent/US3645508A/en not_active Expired - Lifetime
- 1970-06-10 DE DE19702028620 patent/DE2028620A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3088716A (en) * | 1952-09-20 | 1963-05-07 | Nat Res Dev | Magnetic stirrers |
US3116913A (en) * | 1961-05-29 | 1964-01-07 | Lane Kingdon | Liquid agitating apparatus |
US3421528A (en) * | 1964-10-21 | 1969-01-14 | Ludgero S A Gomez | Denture cleaning device |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4911556A (en) * | 1989-03-17 | 1990-03-27 | Lim Technology Laboratories, Inc. | Turbulent stirring unit |
US20050095159A1 (en) * | 2003-10-08 | 2005-05-05 | Nidec Corporation | Method of Manufacturing, Including Method of Inspecting, Fluid-Dynamic-Pressure Bearing Units |
US7343682B2 (en) * | 2003-10-08 | 2008-03-18 | Nidec Corporation | Technique for filling bearing clearance of fluid-dynamic-pressure bearing unit with oil |
US20090223824A1 (en) * | 2008-03-05 | 2009-09-10 | Kazufumi Oouchi | Stirring device, microbe testing device, and microbe testing method |
JP2009210488A (en) * | 2008-03-05 | 2009-09-17 | Panasonic Corp | Stirring device |
US8459862B2 (en) * | 2008-03-05 | 2013-06-11 | Panasonic Corporation | Stirring device, microbe testing device, and microbe testing method |
US10260036B2 (en) | 2014-10-17 | 2019-04-16 | Sani-Tech West, Inc. | Mixing and filtering system and method |
US10501720B2 (en) | 2014-10-17 | 2019-12-10 | Sani-Tech West, Inc. | Mixing and filtering system |
CN114130294A (en) * | 2021-12-13 | 2022-03-04 | 东莞职业技术学院 | Intelligent magnetic stirrer |
CN115946924A (en) * | 2023-02-13 | 2023-04-11 | 广东海洋大学 | Seafood prefabricated vegetable packaging device and packaging method thereof |
CN115946924B (en) * | 2023-02-13 | 2024-03-19 | 广东海洋大学 | Seafood prefabricated vegetable packaging device and packaging method thereof |
Also Published As
Publication number | Publication date |
---|---|
FR2063882A5 (en) | 1971-07-09 |
BE734433A (en) | 1969-11-17 |
GB1311895A (en) | 1973-03-28 |
DE2028620A1 (en) | 1970-12-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3645508A (en) | Magnetic stirrer for conducting dielectric tests on insulating oils | |
US3363468A (en) | Liquid sampling device | |
US3807704A (en) | Dispersing and mixing apparatus | |
US3689033A (en) | Magnetic stirrer device | |
DE19534955A1 (en) | Non-contact piezo-electric assembly | |
DE69824315T2 (en) | METHOD FOR CHARACTERIZING COMPLEX LIQUIDS AND DEVICES FOR IMPLEMENTING THE PROCESS | |
EP0433029B1 (en) | Apparatus for staining cell objects | |
US3680843A (en) | Magnetic mixer for discrete sample systems | |
JP2000254472A (en) | Device and method for agitating | |
US4131370A (en) | Micro stirrer | |
JP3190993U (en) | Mixing and stirring device | |
JP3641992B2 (en) | Chemical analyzer | |
US2499816A (en) | Flocculation and mixing apparatus | |
US3206173A (en) | Stirrer | |
US6017427A (en) | Apparatus for testing high speed electroplating | |
US3326531A (en) | Mixing device for photographic processing solutions | |
US1756286A (en) | Apparatus for determining variations in the physical conditions of agitated materials | |
RU2316754C1 (en) | Method of evaluating permeation capability of a liquid | |
US6270249B1 (en) | Vertically reciprocating perforated agitator | |
US3499833A (en) | Electrophoresis device | |
CN206515431U (en) | A kind of empire paper degradation container | |
KR20180000080A (en) | Centrifuge mixer and test apparatus using the same | |
CN116273222A (en) | Ferromagnetic rotor for agitating liquid in microwells | |
JPH04271823A (en) | Stirring device for liquid in cell | |
DE952624C (en) | Method and device for mixing, emulsifying and dispersing |