US Patent: 449,410
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Wrench
Improvements in Pipe and Other Wrenches
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Patentee:
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| Henry Hammond (exact or similar names) - New Haven, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 24, 1890 |
| Granted: |
Mar. 31, 1891 |
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Patent Pictures:
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Henry Hammond patent March 31, 1891 |
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Stan Schulz
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Description: |
| Double-speed adjustment accomplished by a nut with interior and exterior threads, a threaded shank on the movable jaw, and threads cut on the interior of the clamping frame. |
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