Howard Johnson linear track accelerator video

[corona]

Or you may be able to use some flexible strip magnet to make the ring one, depending on the strength required. You would also have to make sure the strip is a single pole strip and not an alternating pole strip, I'm under the impression that you can get it in both types.

Andrew

[hansvonlieven]

@ corona,

I think you are right. That is probably exactly what Howard did. He seems to have cut pieces out of sheets for some of his other designs.

Hans von Lieven

[broli]

I believe I found a method to make such a gate with my own reasoning. All you need are two ring magnets and shielding. Maybe it'll work without shielding but in pure theory it won't. We all know that theory can be completely wrong sometimes  . If you have some ring magnets you should try it out. I did a basic experiment and this setup indeed pulls the magnet in and can shoot it out if it passes a sticky point. But the shielding should kill that sticky point.

[hansvonlieven]

@ broli,

I think Howard used his rubber ringmagnet as a sort of shielding.

Hans von Lieven

[broli]

Whatever he used the design I proposed should be investigated.

Does someone have some big ring magnets laying around and maybe some iron tubing that can fit inside and acts as the shield?