US Patent: 479,698
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| Wrench
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Patent Dates:
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| Applied: |
Jan. 23, 1892 |
| Granted: |
Jul. 26, 1892 |
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Patent Pictures:
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Henry Bornstein patent July 26, 1892 |
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Description: |
| Turning the handle produces double speed adjustment as the inner portion of the lower jaw and the shank of the outer jaw are both threaded.
Some examples marked with the manufacturer name, others marked 'WORLD'S EXPOSITION, CHICAGO, 1893' plus "Patented July 26, 1892." |
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