Switchable Magnets.

[synchro1]

Hi Syncro,

I finally got around to making some measurements.
(promised in the other thread - An Ingenious Way to Turn Neodymium Permanent Magnets On and Off - Magswitch. . .)
I had a welding project going on and didn't want to disassemble the earth clamp.


Details.
Magswitch 300 amp ground clamp part no WG300MS

I used a spring balance to find the force (torque) required to open/close the magnet.

Max required (towards the end of the closing stroke)
5.4 lbs at 1.75 inc dia.
So about 0.4 lb ft.

Same for both Open/Close. (except that the max on open is near the beginning of the stroke)



Next, I mounted the MagSwich in my drill press.
This was so I could carefully position it near the workpiece using the vernier action of the (expensive) drill press.


1st, using a 1.04 lb wrench lying flat and unsecured on the drill press table,
the magswitch in the on position, needed to get to 0.23 inches before the wrench was lifted into contact.

2nd, using a 48 lb tractor (mild steel) tractor weight lying flat and unsecured on the drill press table,
the magswitch in the on position, needed to get to 0.05 inches before the weight was lifted into contact.



Are there any other tests you would like ?

Thanks

Pete

@PIH123,

Thanks for running the test!

I found this video of the "Magnet Switch" you tested:

https://www.youtube.com/watch?v=r8cKscZ-eM8

[Turbo]

There is no such thing as 'switchable magnets'
Magnetism is a property of space, it is space itself that is magnetised.
That is why we are able to communicate with rosetta at millions of miles away.
What you see around a magnet it is an effect brought out by space itself, it is because the magnetic field lines as you call them can more easily pass through the magnet then they can pass through air and that is why you observe a concentrated area around and in these magnets, if you were to remove space itself you would be left with a non magnetic lump of metal.
So if you would use the term 'switchable space' then that would be a better fit.

The weird part is that the evidence is available you can create magnetic fields in empty space by using high voltage, and if you use for example graphite as your output terminals, there isn't even metal around yet still the magnetic field, or better said, polarized space, pops up revealing all these magnetic effects, and then there are the copper coils, not magnetic by itself but once powered up again, these magnetic effects show up, this is evidence that these effects are a property of space itself, and it is staring you in your face, but still most people believe this magnetic field somehow orginates from the magnet while it has got nothing to do it is more like a lenz concentrating light.

You would not believe me if i said the light comes from the lenz that is concentrating it, because your eyes are able to detect the source of the light.
With magnetism this is not so, and because of that most people are stuck in the continous error believe the field comes from the magnet.
It is a result of not seeing the light or the source of the field, air is to a magnetic field what a resistor is to current, a currant needs to flow, where a magnetic field needs to move to work with, the evidence is all around you, you are wasting your time trying to get light out of a lenz that sit's in darkness, so what can you do? the answer is clear, it is movement of space itself, which has a direct proportion to the light intensity falling on the lenz, example.
The faster you make space move, the more magnetic effects you witness, there are thresholds that need to be reached, like you see in the speed of sound barrier, the speed of light, so has the magnetic field specific limits where things change, and might i say, other things, things not readily understood yet start to show up, so you either try to get your magnet to move at the speed of light,good luck with that, or you find a way to speed up the field or space itself.
There can be no current flow since this limits or acts like a brake and so that means it needs to have a static character, which is all good since volatage is cheap right, and it can be used for a long time, without current flow.   

The question then becomes , how do you switch a static charge ?
There is more to it but that would be a good start and a relay can do it, but not fast enough, what else?

[Pirate88179]

@PIH123,

Thanks for running the test!

I found this video of the "Magnet Switch" you tested:

https://www.youtube.com/watch?v=r8cKscZ-eM8

Wow.  That is a really small one.  I have never seen one like this.

Bill

PS  https://mag-tools.com/magswitch-600-amp-switchable-magnetic-ground-clamp.html

This small one has a 200 pound breakaway.  For its size, that is pretty good but, is is over $100 US.

[norman6538]

Pete thanks for the tests but you need to convert that into ft/lbs and compare
the force to turn it on to the work done ft/lbs then you know if its over unity.
The wrench would have been about 1/4 ft/lbs of work done but not sure what the
work required to turn the magnet on was. Can you supply that?
thanks,
You need to get work in vs work out.

This has been around for awhile so I can't imagine it has been overlooked.

Norman

[synchro1]

John Bedini showed how to easily grow large "Rochelle Salt" crystals for practically nothing. I was surprised to learn they generate the most Piezoelectricity. They grow like "RockCandy".

Piezoelectricity is the ability of certain materials to produce a voltage when subjected to mechanical stress. Piezoelectric materials also show the opposite effect, called converse piezoelectricity, where application of an electrical field creates mechanical stress (size modification) in the crystal.

piezoelectric 01

Figure 1 Piezoelectric effect

The effect known as piezoelectricity was discovered by brothers Pierre and Jacques Curie; they showed that crystals of tourmaline, quartz, topaz, cane sugar, and Rochelle salt (sodium potassium tartrate tetra hydrate) generate electric charge from mechanical stress. Quartz and Rochelle salt exhibited the most piezoelectricity.

The relationship between force and electricity is converse; The material compresses when electrified, and generates electricity when pressured.