US Patent: 415,969
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| Tool Clamp
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Patentee:
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| George F. Hall (exact or similar names) - Newark, NJ |
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Patent Dates:
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| Applied: |
Aug. 16, 1889 |
| Granted: |
Nov. 26, 1889 |
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Patent Pictures:
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George F. Hall patent November 26, 1889 |
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Stan Schulz
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Description: |
| The handle screws up to clamp a movable element, by action of a sleeve and stem. Examples of applications include marking wheels and nut wrenches.
This patent and Hall's April 28, 1891 improvement (patent no. 451,183) were used in a nut wrench produced by Alsdorf and Company, Newark, NJ. |
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