US Patent: 302,595
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| Auger Bit
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Patentee:
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| Henry L. Shaler (exact or similar names) - Deep River, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 29, 1884 |
| Granted: |
Jul. 29, 1884 |
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Jeff Joslin (dm)
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Description: |
| Base of lead screw facing the usual single spur of a single-twist bit is cut partially away to provide additional clearance for the chip. Also, there is a secondary spur at the base of the lead screw, just ahead of the primary spur, to help break the resistance of the chip. |
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