Magnet force shield

[Floor]

@ Dieter

   thanks for the femm files.
..............
On that other topic.....I was practicing to write a pattent / still thinking that a pattent could
keep an design available to all.

    floor

[dieter]

patents are costy, and not granted if already patented, and that research is a lot of work.


However, the patent design guide may be useful.


About femm, it is 2D and does not account for the high horizontal forces due to the flat shape of the stack parts. Femm also tends to see a stack as one single magnet, with a neutral zone in the center. Maybe I should add tiny airgaps between the stack layers. Did you try that, with spacers, eg. 1mm? What is that anyway, I chose "ceramic 8" in Femm.

[Floor]

@ Dieter

The idea to patent "that"... was several years ago.  I researched patenting in the U.S,
pretty thoroughly at that time.
.....................................................................
The magnet stacks are just an easy way for me to create / approximate a single magnet.
I think that they do a pretty good job of that, and that femm seeing a stack as a single
magnet is not problematic.

[dieter]

Just another idea I had: this whole measuring business has a complicating tendency. Often we end up, not knowing if our numbers actually are correct.


A simple work cycle setup could be easier. Although a rotation type seems tricky here.


I was thinking, two independent pistons, over pleuel turning a flywheel with gears each, in 90deg. to eachother, so they can be synched in the right timing. the sinusodial motion seems helpful for this effect. Stack piston opening space by being repelled, shield piston moves between, stack piston falls back with low force requirement, shield piston moves out without much force req., stack piston is repelled...


That would be for a repelling varation.


Stack puston could be "stereo" for both stacks.


I actually made gears out of wood (print on paper, glue on, saw, file...) with surprisingly low friction losses (compared to eg. a rubber belt).


By the size of your magnets, the gain should be capable of driving itself.


Fear of failure is still better than disbelief in the possibility of success. Edison needed 1000+ attempts for the lightbulb. Did anyone here actually try 1000 devices? And besides, this is big.

[dieter]

Actually, I didn't saw the gears, but drilled holes (table drill) and filed it mainly. That's quick. Punching the very centers for each hole with a loupe and a nail provides high precision when drilling. Hey, wood rocks ^^