US Patent: 458,640
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Boring Bit
Bit With Replaceable Wood-Screw Lead
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Patentee:
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| Elwood C. Phillips (exact or similar names) - Chicago, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 06, 1891 |
| Granted: |
Sep. 01, 1891 |
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Jeff Joslin (dm)
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Description: |
| Bit is designed to use an ordinary wood-screw as the screw lead. It is kept from spinning relative to the bit by a screw driver tip, which also enables the bit to be used as a screwdriver with the boring cutters removed. Bits with wood-screw leads seem to have been a specialty of Phillips. |
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