US Patent: 243,978
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Drill-Chuck
Three-jaw chuck with self-aligning jaws
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Patentee:
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| George S. Rominger (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 03, 1881 |
| Granted: |
Jul. 05, 1881 |
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Patent Pictures:
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George Langford
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Description: |
| This rather idealistic design of a self-avowed "cheap chuck" is doomed to quick breakage because there is an impossible compromise between the delicate inner projections on the jaws and the limited cross section of the groove in the spindle. |
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