The Evolution of Modern Band Saw Mills for Sawing LogsPrescott, D. Clint
Philosophy
The Evolution of Modern Band Saw Mills for Sawing Logs
Prescott, D. Clint
Sawmills
This kind of talk was certainly catchy with lumbermen for it also
sounded good. There was, however, just one thing Mr. Esplin and others
overlooked, namely, if an adjustment is at all necessary to meet
changing conditions in a band saw running from 9,000 to 10,000 feet in
a minute, then that adjustment must of necessity take place almost like
a flash of lightning, and that automatically.
Mr. Esplin’s lower wheel, boxing, shaft, belt pulley, rocker frame,
lever and weight probably weighed four tons. Such a weight cannot move
like a flash, and goes too far when it does move, and broken saws or
snakey lumber were the logical result. The inertia of such a mass
prevents quick action.
This mill was a failure like the rest, and the designers of Band Saw
Mills for sawing logs were left groping in darkness. To be sure, Band
Mills to some extent were in use though largely under protest because
of the poor lumber they made, the small quantities produced, and the
troubles experienced with cracked and broken saws.
[Illustration: Cunningham Inclined Band Saw Mill]
It was in the same year, 1886, that The Filer & Stowell Co., of
Milwaukee, Wis., flattered themselves into believing that other
machinery builders did not really understand just how a Band Mill for
sawing logs should be built, and being perfectly cognizant of the
difficulties experienced and of the remedy to be applied, they designed
and brought out and advertised the Cunningham Inclined Mill, an
illustration of which is here shown.
For a unique organization this mill took the cake. The idea of it was
good, and it should have been a winner, but for some reason it was not.
They built and sold quite a number of them, and then later they changed
to a more sensible kind of a mill.
As will be observed, this mill inclined to the rear twenty or more
degrees, with the result that the saw would enter a log like a circular
saw, cutting under in a manner similar to the circular instead of
straight down across the grain as band saws usually do. It was
understood that a circular could do straight work and very much more
daily than was possible with a band saw. It was, therefore, quite
natural to suppose that if a band mill could be constructed so as to
operate substantially like a circular with equal advantages, then there
appeared no reason why it should not do as good work if not quite so
much. At all events it was expected that this mill would do more work
and better work than any of its predecessors. But it did not, and
proved to be quite a nuisance as it required about six men to place the
saw on its wheels every time they were changed; and the mill went out
of use.
[Illustration: Band Saw Mill of Wilson & Hendrie]
Public-domain text, read in full here on John Shaqi.
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