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Stirrer: Magnetic Stirrer, a Turning Horseshoe Magnet under a Free Magnet Rod (Rosinger, US 2,350,534, 1944)
The magnetic stirrer of the chemistry lab. A small motor in a box spins a horseshoe magnet just under the thin lid. A little magnet rod sealed in an inert shell lies loose in the flask on top and spins with it, stirring the liquid into a deep vortex with nothing poking through the neck, so the flask can stay closed, under pressure or vacuum.
Result: a stirrer for laboratory liquids, speed set by a rheostat.
Source: A. Rosinger, US 2,350,534 (1944). Unknown: sizes, the motor and the magnet alloys. Picture: the patent drawing.
Katamtaman
Unknown
Mga Tagubilin
1
1
Build the box
Build the box
Make a box with a bottom, side walls and a removable top, all of non-magnetic material. Make the top as thin as you can. Not given: the material, sizes.
Mga materyales para sa hakbang na ito:
Hindi kilalang materyal1 non-magnetic boxMga kailangang kasangkapan:
Hindi alam na sukat2
2
Mount the motor and magnet
Mount the motor and magnet
Fix an electric motor in the middle of the box with its shaft upright, held by bands round its housing whose arms are screwed to the side walls. Fix a strong horseshoe permanent magnet on the shaft, poles up, so its pole faces turn as close under the thin top as possible. Not given: the motor, the magnet alloy.
Mga materyales para sa hakbang na ito:
De-kuryenteng motor1 piraso
Hindi alam na metal1 bands and arms
Magnetong hugis-suwelas ng kabayo1 pirasoMga kailangang kasangkapan:
Set ng mga distornilyador3
3
Wire the speed control
Wire the speed control
Lead the motor wires out of the box through a regulating rheostat and a switch to a cord with a plug. The rheostat sets the motor speed, and so the stirring speed.
Mga materyales para sa hakbang na ito:
Rheostat1 piraso
Toggle na switch1 piraso
Malambot na kordon na may plug1 pirasoMga kailangang kasangkapan:
Set ng mga distornilyador4
4
Make the stirring rod
Make the stirring rod
Take a small round permanent magnet rod, shorter than the width of the flask's bottom, and seal it in a thin shell of an inert material (porcelain, glass, Bakelite or a suitable plastic) so it cannot affect the liquid. Where bare iron or steel would do no harm, the shell may be left off. Ours: a sealed glass tube for the shell.
Mga materyales para sa hakbang na ito:
Set ng magnet na barra1 rod magnet
Tubong salamin1 shellMga kailangang kasangkapan:
Bunsen burner5
5
Stir
Stir
Stand a non-magnetic flask or beaker of the liquid on the box and drop in the rod. Switch on and set the speed: the rod follows the turning magnet and whips the liquid into a deep vortex. Set the rod off-centre and it both spins and travels round the bottom, stirring faster still. The vessel can be closed, since no shaft goes in.
Mga kailangang kasangkapan:
Basong Salamin na Pang-aghamMga Materyales
9- 1 non-magnetic boxPlaceholder
- 1 pirasoPlaceholder
- 1 bands and armsPlaceholder
- Placeholder
- 1 pirasoPlaceholder
- Placeholder
- 1 pirasoPlaceholder
- 1 rod magnetPlaceholder
- 1 shellPlaceholder
Mga Kinakailangang Kasangkapan
4- Placeholder
- Placeholder
- Placeholder
- Placeholder
Ang blueprint na ito ay gumagawa ng
CC0 Pampublikong Domain
Ang blueprint na ito ay inilabas sa ilalim ng CC0. Malaya kang kumopya, magbago, mamahagi, at gumamit nang walang pahintulot.
Suportahan ang Maker sa pamamagitan ng pagbili ng mga produkto sa kanilang Blueprint Komisyon ng Maker itinakda ng mga Vendor, o lumikha ng bagong bersyon ng Blueprint na ito at isama bilang koneksyon sa iyong Blueprint upang ibahagi ang kita.