US Patent: 1,249,300
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| Chuck
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Patentee:
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| Wendell A. Barker (exact or similar names) - Chicago, Cook County, IL |
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Patent Dates:
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| Applied: |
Jul. 29, 1916 |
| Granted: |
Dec. 11, 1917 |
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Patent Pictures:
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Joel Havens
"Vintage Machinery" entry for Thomas Elevator Co.
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Description: |
| Claim:
In a chuck, the combination of a rotatable chuck body, jaws movable radially therein, levers pivoted on said chuck body and connected to said jaws, means concentric with said body and normally rotating at the same speed and in the same direction with the latter for actuating said levers, and means for rotating said lever-actuating means relatively to said body while the latter is rotating, to effect actuation of said levers. |
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