US Patent: 299,429
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| Combined Drill and Countersink
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Patentee:
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| Albert J. Smart (exact or similar names) - Greenfield, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 10, 1883 |
| Granted: |
May 27, 1884 |
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Patent Pictures:
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Albert J. Smart patent May 27, 1884 .. with Wiley and Russell hollow center drill bit holder |
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Stan Schulz
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Description: |
| The key features are the hollow cylinder, and the countersink cutter on the tapered end.
Wiley and Russell's "LIGHTNING" drill holder shares some of these characteristics.
The hollow center and set screw appear in Charles P. Russell's August 5, 1884 patent (no. 303,053). |
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