US Patent: 186,513
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| Improvement in Countersinks
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Patentee:
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| Dummer J. Adams (exact or similar names) - Kittery, ME |
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Patent Dates:
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| Applied: |
Jan. 05, 1877 |
| Granted: |
Jan. 23, 1877 |
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Patent Pictures:
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Jeff Joslin (dm)
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Description: |
| Countersink with a slit conical head, slit bit that is adjusted longitudinally, and a securing screw.
The 1856 New England Business Directory lists Dummer Adams of Kittery as a blacksmith.
Know examples are marked with the patent date. It seems most likely that they were manufactured by the inventor, but we have found no direct evidence. |
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