US Patent: 8,872
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Mill for curvilinear sawing
Reciprocating sawmill for cutting beveled pieces
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Patentee:
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| James Hamilton (exact or similar names) - New York, NY |
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Patent Dates:
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| Granted: |
Apr. 13, 1852 |
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Jeff Joslin
Vintage Machinery entry for James Hamilton
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Description: |
| Improvements to patents granted to the inventor in 1842 (patent 2,704) and 1843. According to M. Powis Bale's book "Woodworking Machinery, Its Rise, Progress and Construction", "In the year 1854 Mr. James Hamilton, of New York, patented an arrangement of vertical saws especially adapted for cutting ships' timbers. A machine, made under this patent, was erected at the shipbuilding yard of Messr. Wigram and Son, Blackwall. The machine ran two saws, which cut both sides at once of any timber ordinarily used in shipbuilding. Each saw was hung in such a manner as to be free to turn on its centres, and present its cutting edge in any required direction; they were also arranged to move laterally in the saw frame. This movement was obtained by stretching each saw in a separate frame, which frame slided sideways within the principal frame. The sawyer controlled the position of both the saws by holding a lever or guide in either hand, and thus manipulated, each saw was made to follow the line on the timber to any desired curve or taper. The bevel of the timber was obtained by causing it to revolve somewhat as it was fed up to the saw, and the exact bevel necessary at every point was thus secured, and the timber left the saw sufficiently true to require little or no trimming." |
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