[TheForge] Krause/Nazel type air hammer

[Gladish Family]

I decided not to build one of these because of how much time I don't have,
but after gazing at Mark's book and my sketch pad for hours, I concluded
that the job could be done by a linkage that activates two ball valves. One
opens as the other closes.
Times two, of course, for upper and lower air passages.
Get the proportions of the levers right for the treadle travel, and you've
got it with components you can buy at Ace Hardware.
Simple, huh?
Not as cute as Mark's, but it would work.

Andy G.