US Patent: 206,320
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Improvement in Drill-Chucks
Means of keeping the jaws in alignment
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Patentee:
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| George W. Hayden (exact or similar names) - Worcester, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 13, 1878 |
| Granted: |
Jul. 23, 1878 |
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Patent Pictures:
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The figures in the patent have been rearranged somewhat. |
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George Langford
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Description: |
| The jaws have slots through which pins are placed that fit into transverse holes in the slotted body of the chuck. The pins keep the jaws from passing the centerline of the chuck and also retain the jaws inside the body of the chuck. |
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