US Patent: 339,539
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| Bandsaw mill
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Patentee:
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| Charles Esplin (exact or similar names) - Minneapolis, MN |
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Patent Dates:
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| Applied: |
Feb. 05, 1886 |
| Granted: |
Apr. 06, 1886 |
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Jeff Joslin
Vintage Machinery entry for Pray Mfg. Co.
D. C. Prescott's 'Evolution of Modern Band Saw Mills'
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Description: |
| Another patent to this inventor apparently covers the use of a idler-wheel rim that is independent of the rest of that wheel: yet another way of reducing the momentum of the idler wheel so as to minimize blade buckling. This invention covers the use of a friction-brake on the independent rim, with the brake optionally being used to drive accessories to the saw, such as blowers or bark-rossers.D. C. Prescott's 1910 monograph, "The Evolution of Modern Band Saw Mills for Sawing Logs", says, "Early in 1886 Mr. Charles Esplin, of the Pray Mfg. Co., of Minneapolis, Minn., built a Band Mill upon an entirely new principle, and one of them was operated that year by the Superior Lumber Co., of Ashland, Wis. It was illustrated and advertised in 1887 as 'the only perfect Band Mill in use.' It transpired, however, that the analysis of band saw troubles and their causes as published by Mr. Esplin was truly perfect, but the Band Mill built by him to correct the troubles was imperfect to the extreme, as will be seen; and the wonder is that he did not see it himself, when clearly on the right track..." See the link for the rest of Prescott's critique of Esplin's design. |
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