On Wednesday, May 20, 2015 at 7:53:07 PM UTC-4, Robert Green wrote:
wrote in message

A powerful magnet, with only "pin point" accuracy would be real useful
for nail removal. In other words, the magnet would be held right over
the nail head. I'm not sure just how much force would be needed though.

http://www.google.com/patents/US20070039286

--
Bobby G.

I hope you posted that for the laugh of the day, not because it
would actually work. Clearly whoever came up with this idea is
clueless. Many of the claims made and drawings show it. For
example, you have a tool that looks similar to a hand held
driver drill, allegedly pulling nails from tongue and groove
flooring, they claim you can pull framing nails, etc. Even
assuming a handheld device could generate sufficient magnetic
force to hold onto the nails, have you ever tried to pull a
nail with a hammer by just grabbing it with the hammer claw
and pulling, ie without using the hammer for leverage to
remove it? Yet that is what this crap shows, the nails just
being pulled out without leverage. Also note that not a single
bit of physics is stated, ie what magnetic force can reasonably
be generated by such a device versus the force required to
pull the various types of nails claimed. If it really works,
a prototype would be very easy to build, where is it? The
patent office must have gone down the crapper like most of
the rest of govt. Good grief.