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Author Topic: Magnet force shield  (Read 90086 times)

Floor

  • Guest
Re: Magnet force shield
« Reply #180 on: April 14, 2018, 05:23:23 PM »
Thanks citfta

               floor


Floor

  • Guest
Re: Magnet force shield
« Reply #181 on: April 24, 2018, 09:51:15 PM »
This latest video is called "Shield Actions"

http://www.dailymotion.com/video/x6ichk2

Best to watch it in the context of these other two videos

http://www.dailymotion.com/video/x6gzr2q
                                  and
http://www.dailymotion.com/video/x59r978

                 best wishes
                           floor

Floor

  • Guest
Re: Magnet force shield
« Reply #182 on: April 28, 2018, 12:01:14 AM »
A demonstration video of a very effective magnetic force shielding.

                  http://www.dailymotion.com/video/x6ijgy1

              floor

norman6538

  • Hero Member
  • *****
  • Posts: 587
Re: Magnet force shield
« Reply #183 on: April 28, 2018, 02:13:05 PM »
I only get sound on my Linux system and on windows the sound is very low and poor
quality. Is anyone else having problems with dailymotion videos??

Norman

gyulasun

  • Hero Member
  • *****
  • Posts: 4117
Re: Magnet force shield
« Reply #184 on: April 28, 2018, 04:12:58 PM »
On my Windows system the sound is low with respect to his other similar videos.  When Floor zooms the camera onto the stationary magnet, the sound is much better as he speaks close to it but at the distance the sound is lower than usual.  And he surely speaks in a low-toned voice in this video.  Picture quality is good.

Even though some words are not clearly understandable it is good what he demonstrates I think we can agree on that.   8)

Gyula

Floor

  • Guest
Re: Magnet force shield
« Reply #185 on: April 30, 2018, 08:45:59 PM »

On many of these videos, I often find that I have to ues external speakers in order to get enough volume.
This is the easiest solution.  The fault is my own.  I some times, am simply not speaking loudly enough, during
the videos.  External speakers are the only thing you can do.

                     thanks for the comments
                     I will try to remember to speak loud and clear In the future.
                                               floor 

Floor

  • Guest
Re: Magnet force shield
« Reply #186 on: May 01, 2018, 02:27:54 PM »
                                                          NOTES ON
                             VARIATIONS IN THE SHIELDING MAGNET ARRAY

In this last video I got the best shielding results to date.  I did this by trying
out various magnets as the shield magnet array.

I swapped various magnets into the various positions until I arrived at a satisfactory
level of shielding effectiveness. I then labeled 3 particularly effective magnets as #1, #2
and #3 for future reference / demonstrations. 

Also, I  labeled two particular magnets for use in the fixed and sliding magnet positions.

Prior to this, inconsistencies in my results were just about giving me fits !

I have found SIGNIFICANT differences in the effectiveness of shielding.....
while using magnets (which although they are of the same shape and size)...
those magnets are of significantly varied strengths from each other.

The variations in the magnet strengths are a consequence of using  inexpensive / off
the shelf magnets.
 
I have not as of this time, determined what kind of mix and match of shield magnets
is most effective.  In other words... the three magnets used in the shield magnet array
in the last video... are unknown to me in the respects of

are all three magnets of a very similar strength ?
are the two outer most magnet well matched .. while the inner is stronger ?
are the two outer most magnet well matched .. while the inner is weaker ?
and so on ????
                             floor

gyulasun

  • Hero Member
  • *****
  • Posts: 4117
Re: Magnet force shield
« Reply #187 on: May 02, 2018, 12:22:49 AM »
Hi Floor,

I have attached a drawing someone made years ago (unfortunately I do not remember in which yahoo technical mail group he uploaded and who he was, to acknowledge).   He used a Gauss meter to check two ferrite magnets how their field changes at the surface of the magnets at different points and then he let them attract and measure the flux again at the same points and he also placed them facing in repel and checked the flux again. The mechanical sizes for the magnets he used are in the top row. They were magnetized through their thickness.

His measurements also show what you found: two magnets of the same size and type do not have identical strength at all.
I do think that this is also valid for rare earth magnets because magnet manufacturers charge extra cost if someone wants to buy quasi equal strength magnets (albeit still within certain tolerance range).

This means that for such shielding purposes it seems the best (what you also had to do) to select the magnets out of several ones to get satisfactory results and this involves buying several magnets at the cheapest price possible which is probably ebay.com or maybe aliexpress.com   Also, it may be worth building a simple yet useful Gauss meter, especially for comparing magnets, no real need for calibrating for actual Gauss values in this case.   I found this link at random:
https://rimstar.org/science_electronics_projects/diy_gauss_meter_with_digital_display_ba.htm   or another simple circuit:
http://www.coolmagnetman.com/magmeter.htm 

Gyula 

Floor

  • Guest
Re: Magnet force shield
« Reply #188 on: May 03, 2018, 10:46:47 PM »
@Gyulasun

        Thanks for the info. and links
                          floor

Floor

  • Guest
Re: Magnet force shield
« Reply #189 on: May 07, 2018, 06:20:09 PM »
                                                   A path to over unity with magnets

 BELIEVING THAT HUMAN BEINGS CAN DO MOST ANY THING THEY DECIDE TO DO.

                                        HAVING A WILLINGNESS TO LEARN
                                                           AND
                            A general UNWILLINGNESS TO BE INSTRUCTED.

The study of, and arriving at a clear understanding of science's definitions of  energy, work and force
enables one to comprehend the possibility that energy CONVERSIONS might result in an over unity of
mechanical work input to mechanical work output.

Exposure to daring and brilliant minds (such as are some of those present at the OVERUNITY forum), and to
their ideas and to the links to many other internet resources.
....................................................
BIGGER IS NOT ALWAYS BETTER. Working with small / weak magnets allowed direct / hands on contact with and manipulations of magnets.  This along with some precise measurements, allows one to arrive at CLEAR UNDERSTANDINGS of the forces involved and of the directions (vectors) in which those forces act.
....................................................
NOT having the approach toward efficiency as a primary goal.....

leads one away from focusing upon conservation of energy via circular motion, constant motion
or consistent direction of motion, but instead, toward completions of actions before the start of a
next action, start / stop motions, reciprocating actions, right angle and / or near right angle interactions....

Resulting in low speed / high force / small displacement actions in which accelerations are small and therefore also
is there LITTLE OR NO ADVANTAGE gained in arrangements made in order to conserve momentum !

                 These things, and a good woman by your side.

          In the words of Stephan H.  "hmmm"

norman6538

  • Hero Member
  • *****
  • Posts: 587
Re: Magnet force shield
« Reply #190 on: June 09, 2020, 03:52:28 AM »
A demonstration video of a very effective magnetic force shielding.

                  http://www.dailymotion.com/video/x6ijgy1

              floor
The problem I have with that shield is the thick magnets reduce the amount of repel that can be harvested. I prefer thin metal between to attract to both sides equally.

Norman

Floor

  • Guest
Re: Magnet force shield
« Reply #191 on: June 09, 2020, 06:23:13 AM »
@ Norman6538

Here is one possible solution to force diminishing with distance.
@
https://www.dailymotion.com/video/x70pgaf

   floor

Floor

  • Guest
Re: Magnet force shield
« Reply #192 on: June 09, 2020, 06:30:37 AM »
See JPGs below

ayeaye

  • Hero Member
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  • Posts: 866
Re: Magnet force shield
« Reply #193 on: June 09, 2020, 01:01:52 PM »
Ok, we can separate two magnets that attract, move them around, then join them again, so what?

It looks like to me that nothing which you are talking about is overunity, yet you keep posting, at that getting no benefit of it, so what interests me is, what motivates you?

Just my opinion, btw, no one has to agree. You write about your work and i write my opinion, as anyone can do. You can go to my thread about the asymmetry of the field and write your opinion as well, but only about my work. Your opinion can be negative or it can be incorrect, whatever, you have the right to write your opinion.


Floor

  • Guest
Re: Magnet force shield
« Reply #194 on: June 10, 2020, 12:51:25 AM »
...