US Patent: 160,954
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Improvement in Drill-Chucks
Collet chuck for drill and screwdriver bits.
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Patentee:
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| John O. Reilley (exact or similar names) - Jersey City, NJ |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 16, 1875 |
| Granted: |
Mar. 16, 1875 |
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Patent Pictures:
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George Langford
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Description: |
| The collet is split into four segments at each end and is tightened onto the bit by a threaded shell that compresses the collet between a conical recess inside the spindle and another conical recess at the nose of the shell. |
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