US Patent: 1,004,902
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| Boring-Bit
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Patentee:
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| William Potter (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 22, 1910 |
| Granted: |
Oct. 03, 1911 |
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Jeff Joslin (dm)
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Description: |
| This auger bit has two cutting spurs (one a full turn below the other and on a smaller circumference), along with a secondary chip cutter which is a continuation of a steeply pitched lead screw. The aim is rapid, clean, boring. |
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