US Patent: 356,616
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| Drill-chuck
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Patentee:
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| Calvin L. Butler (exact or similar names) - Greenfield, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Nov. 11, 1886 |
| Granted: |
Jan. 25, 1887 |
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Jeff Joslin
Vintage Machinery entry for Skinner Chuck Co.
Vintage Machinery entry for Butler Chuck Co.
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Description: |
| It appears that once the patent expired, the inventor established Butler Chuck Co. and began manufacturing this chuck himself. We don't know if the assignee, who owned Skinner Chuck Co., ever manufactured the chuck. Skinner received an 1888 chuck patent 381,857, that he definitely manufactured. |
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