US Patent: 637,375
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| Wrench
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Patentee:
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| Samuel Davidson (exact or similar names) - Buffalo, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 10, 1898 |
| Granted: |
Nov. 21, 1899 |
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Patent Pictures:
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Samuel Davidson patent Nov. 21, 1899 |
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Stan Schulz
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Description: |
| Interrupted threads on the adjusting worm allow quick adjustment; the patented feature is details of the movable jaw construction, combined with the grooved sides of the main shank. |
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