US Patent: 239,863
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| Method of Adjustment of the Tension of Circular Saws
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Patentees:
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| George F. Simonds (exact or similar names) - Fitchburg, MA |
| Daniel Simonds (exact or similar names) - Fitchburg, MA |
| Alfred A. Marshall (exact or similar names) - Fitchburg, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 19, 1881 |
| Granted: |
Apr. 05, 1881 |
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Russ Allen.
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Description: |
| Use of a straight edge and a graduated wedge shaped gage to determine tension. |
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