US Patent: 932,709
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| Chuck
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Patentee:
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| Hobart S. Johnson (exact or similar names) - Madison, Dane County, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Nov. 02, 1905 |
| Granted: |
Aug. 31, 1909 |
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Patent Pictures:
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Joel Havens
"Vintage Machinery" entry for Gisholt Machine Co.
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Description: |
| Hobart S. Johnson was vice president and factory works manager for the Gisholt Machine Co.
Abstract:
he main object of the present invention is to provide a chuck with an electrically- actuated jaw or jaws. A further object is to furnish a chuck having one or more jaws which may have means for mechanical adjustment with reference to the other jaw or jaws, the final grasping or clamping action of said first jaw or jaws being secured by the action of one or more electromagnets or the like. A still further object of the invention is to employ a power-multiplying device intermediate the jaw and its actuating electromagnet (or motor).
Claim:
In a chuck, the combination of a body; a relatively fixed jaw or jaws; a relatively free jaw; and an electro-magnet carried by the body, adapted to move the free jaw and to hold it in its working position. |
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