US Patent: 234,109
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| Hand-drill
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Patentee:
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| John W. Burkholder (exact or similar names) - Moline, IL |
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Patent Dates:
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| Applied: |
May 14, 1880 |
| Granted: |
Nov. 02, 1880 |
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Patent Pictures:
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Burkholder 234,109 |
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George Langford
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Description: |
| This breast style drill's patent is not listed in the 81/34 classification but rather in class 279/64 for the chuck which uses 2 hooked jaws to grab the square edges of a tanged bit. The crank handle is also adjustable. Burkholder was listed in era city directories as "practical machinist and manufacturer of geared braces, experimental machinery, model and pattern maker". There are at least 4 examples of this drill in existence. |
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