US Patent: 374,594
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| Drill Chuck
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Patentee:
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| Albert D. Goodell (exact or similar names) - Millers Falls, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 30, 1887 |
| Granted: |
Dec. 13, 1887 |
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Patent Pictures:
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Albert D. Goodell patent December 13, 1887 |
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Stan Schulz
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Description: |
| This two-stage adjustment has a typical twin-jaw chuck with an added adjustable seat at the base of the chuck. The chuck tightens in the normal fashion. Once the drill shank is gripped, the base of the chuck moves into the seat, which spreads the base of the jaws and tightens their grip.
The specifications include an error correction notice at the very end. |
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