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To keep from hijacking the sawmill thread

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  • To keep from hijacking the sawmill thread

    Rather than hijack the thread on the log saw, I will attempt to describe a home built saw I was allowed to inspect back in (about) 1952 near Panaca Nevada. Water powered.

    The blade was a straight blade, about 4 feet long and about 3 fingers deep with about a 1/4" cut width. It was attached to a pair of geared wheels with a pin on the outside edge of each one, so it reciprocated both vertically and horizontally. (I'm sure there is a proper terminology for such a gear.)

    What caught my interest though, was the log driver. It was a large "fist" on a shaft, which pressed against the back end of the log. There was a pawl/gate attached to the upper blade-driving gear which came down to block the log during the upswing of the blade. There was a double (triple ... quad...?) toothed chain under the log.

    The pressure to drive the log against the blade was provided by a downspout, which filled with water to provide a constant pressure against the log. The operator would close the valve on the downspout to trap water in the tube to drive the log against the reciprocating blade. (I could put both fists in this tube.) When the log was cut through, the operator would open the relief valve on the downspout plumbing and the water would escape, so the gear drive on the toothed drive track would then engage, pulling the log back to be rotated or removed..

    I am not CAD literate, so I can't provide drawings, but I hope my written description will give you an idea of what I saw at the age of (about) 12 or 13yo.

    Pops

  • #2
    Interesting posting Pops, too bad we don't have pics of this set up.

    A number of mills in years ago, had some quite ingenious homebuilt mechanisims that done the job.

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