US Patent: 26,613
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| Auger
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Patentee:
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| Napoleon B. Phelps (exact or similar names) - Rochester, NY |
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Patent Dates:
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| Granted: |
Dec. 27, 1859 |
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Kirk Eppler
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Description: |
| "My improvement is applicable to bits and augers of the kinds known as the 'double and single twist,' and consists, as applied to the latter, in uniting the end of the helical rod where it terminates in the cutting lip, with the preceding coil so as to constitute what I term the 'supported cut,' and form an arch over the cavity of the helix, for the support of the conical screw." |
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