The cup provides a path for flux lines from backside of magnet to get to
the front, creating intense flux in the gap between them.

Yrs,
d

On Wed, Jul 5, 2017 at 4:34 PM, Alistair Bell <albell@shaw.ca> wrote:

> Old shipwright gave me some scraps, wasn't from broken mallet.
>
> Yes, could use it for all those purposes, but isn't the primary use.
>
> The metal cup for the magnet I got from lee valley but must be available
> from many places. Sized for the magnet and has countersunk hole for screw.
> I think they now have a notch in the side so you can get the magnet out
> again. Pretty well impossible to pry the magnet out of my version.
> Supposedly the metal cup alters the magnetic lines of flux enhancing the
> attraction on that side.
>
> Alistair
>
> > On Jul 5, 2017, at 1:18 PM, Jim Felder <jim.felder@GMAIL.COM> wrote:
> >
> > Very nice. Lignum vitae scraps? You must have had a woodcarving mallet
> come
> > apart on you. Also sticking notes, maps and such to the dash of a diesel
> > vanagon! Where'd he get the magnet with the pocket on one side, or is
> that
> > just the way it appears?
> >
> > Jim
> >
> >> On Wed, Jul 5, 2017 at 3:03 PM Edward Maglott <emaglott3@gmail.com>
> wrote:
> >>
> >> to prop open a too loosely swinging vent window?
> >>
> >> Edward   (who once made a much less attractive magnet with stick glued
> on
> >> for this purpose.)
> >>
> >>> On Wed, Jul 5, 2017 at 3:57 PM, Alistair Bell <albell@shaw.ca> wrote:
> >>>
> >>> This little gadget might be too small for Felder industries to bother
> >>> with. It might be even considered silly, but it works.
> >>> But just having a magnet on a short handle is handy for finding screws
> >> etc
> >>> dropped in the gravel or dirt.
> >>>
> >>> Most every van owner could use this, not saying many will, but they
> could
> >>> :-)
> >>>
> >>> https://shufti.blog/2017/07/05/vanagon-whats-this-gizmo-used-for/
> >>>
> >>> Alistair
> >>
>