US Patent: 358,550
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| Feed-roll for gang-saws
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Patentee:
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| William Harvey (exact or similar names) - Arnprior, ON Canada |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 18, 1886 |
| Granted: |
Mar. 01, 1887 |
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Jeff Joslin
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Description: |
| Assignee Hugh McLachlin was the older of two surviving brothers who owned McLachlin Brothers, a large sawmill operation in the Arnprior area. That firm started as a sawmill founded by the brothers' father, Daniel McLachlin, in 1854. In 1869 Daniel retired, and his three sons took over the business and renamed it. The mill operations survived until 1929, and revived briefly between 1936 and 1938. To our knowledge they did not manufacture sawmills, but this is a subject for further research. Witness Richard Macnamara was the accountant and head bookkeeper for the McLachlin Bros.; witness Dulmage was a local lawyer.A gang reciprocating sawmill was used to cut a log into boards all in one pass. But they were having trouble with the log sliding backwards under the pressure of all those blades cutting at the same time. If they used a conventional feed-roll that had lots of sharp teeth on it to grip the log then the teeth-marks would mar the edges of the finished boards. This new feed-roll has teeth that line up with the sawblades so that the teeth marks are lost in the saw kerfs. As a side effect, the teeth helped cut the long wood fibers, which reduced the problem of long fibers ripping out ahead of the saws.Thanks to Laurie Dougherty of the Arnprior & District Archives for providing us the history of McLachlin brothers and identifying the various people named in the patent documents. |
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