[TheForge] Treadle Hammer Springs

[Marc Godbout]

I'm not the whiz-bang that Bruce is, but here's what I came up with:
http://forgemagic.com/bsgview.php?photo=1673&cat=&by=Marc%20Godbout
Just look at the Treadle Cushion Spring picture.

--Marc


On 3/21/07, wmullett at bright.net <wmullett at bright.net> wrote:
> Bruce,
>
> Your the wiz-bang at the mechanics of these.  Since most of the real force of hammering comes from the inertia of the hammer, why couldn't you use a heavy spring on the treadle connection to the head that will reduce the impact to your leg.
>
> The Chinese use split bamboo sledge hammers for that reason.  They kind of act like a wet noodle when they swing them.
> ---------------
> From: Bruce Freeman <freemab222 at yahoo.com>
> Date: Tue Mar 20, 8:58 PM
> To: Sponsored by ABANA <theforge at mailman.qth.net>
> Subject: Re: [TheForge] Treadle Hammer Springs
>
> Do you have any way of adjusting WHERE this stop
> occurs?  It would probably be less jarring if it
> stopped at the floor - where the leg is fully
> extended.  (Another feature of the Grasshopper.)
> <Grins and polishes nails on lapel.>
>
> Bruce
>
> --- Marc <marc at ironringforge.com> wrote:
>
> > Actually, Bruce, the part of the treadle hammer that
> > bothers my knees
> > the most is the sudden stop when the blow hits the
> > work. My leaf spring
> > cushions that blow very nicely.
> >
> > The spring tension affects my own energy level much
> > more than my knees.
> > I find I can draw out some good size stock pretty
> > quickly, but I'm
> > pretty winded after a while. I think using your
> > half-spring idea would
> > help quite a bit there, and I;m anxious to try it
> > out.
> >
> > --Marc
> >
> >
> > On Sun, 2007-03-18 at 19:12 -0700, Bruce Freeman
> > wrote:
> > > Middle aged knees... I know about those.  I
> > sometimes
> > > wonder whether it's worse to exercise or not to
> > > exercise!
> > >
> > > Build a Grasshopper and you'll have NO spring
> > tension
> > > working against your leg!
> > >
> > > Bruce
> > > NJ
> >
> >
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