US Patent: 55,144
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Improvement in Augers Countersink for Bolts
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Patentee:
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Henry T. Moody (exact or similar names) - Newburyport, MA |
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Patent Dates:
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Granted: |
May 29, 1866 |
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Jeff Joslin (dm)
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Description: |
Primarily intended for ship building, the purpose of this auger is to enlarge an existing hole deep enough provide for the head of a bolt and a covering plug. The detachable cylindrical lead-plugs were to be provided in various diameters to accommodate different sizes of bolt-holes. |
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