US Patent: 323,454
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| Auger-Bit
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Patentee:
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| Fisk Shailer (exact or similar names) - Chester, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 11, 1885 |
| Granted: |
Aug. 04, 1885 |
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Jeff Joslin (dm)
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Description: |
| Shailer's intent is to address perceived difficulties with double threaded (i.e. "fine"), as well as single threaded ("coarse"), lead screws when used with double-twist augers. He proposes to double thread only the tip of the lead screw, to aid accurate starts, followed by single threading, to help maximize its grip on the material. |
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