US Patent: 7,603
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Saw
Teeth for straight and circular saws
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Patentee:
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| Hazard Knowles (exact or similar names) - Washington, DC |
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Patent Dates:
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| Granted: |
Aug. 27, 1850 |
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Jeff Joslin
Vintage Machinery entry for Hazard Knowles
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Description: |
| The patent mentions sawmill blades, either circular or straight, but the only known example of this patent is a handsaw, which is stamped "W. B. Gregory & Co. / Albany / Warranted", and "H. Knowles / Patent / 7 Aug 1850". The sawblade retains its patented teeth. It is likely that sawmill blades, both circular and straight, were manufactured under this patent but such blades only last a few years of use and would have been discarded.The cutting edges of the patent teeth are swaged outward beyond the edge of the saw plate, and are not set; rather, the swaging provides the side clearance. Because each tooth projects only a small amount from the edge of the saw plate, the saw plate itself acts as a chip limiter to prevent the saw from taking an excessive bit. This chip limiting is claimed to prevent tooth breakage.There was an article on this patent in the September 1983 (No. 33, p. 5) issue of the MWTCA "Gristmill". |
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