US Patent: 320,357
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| Wrench
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Patent Dates:
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| Applied: |
Feb. 07, 1885 |
| Granted: |
Jun. 16, 1885 |
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Patent Pictures:
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1 | 2
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Jacob Huber Pat. June 16, 1885 |
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Stan Schulz
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Description: |
| The main shank has threads on two curved sides; the adjuster has interrupted threads allowing for combined quick and final screw adjustment. Marketed as the Crosby Rapid Transit Wrench. Marked only PAT JUNE 16, 1885.
Frank L. Smith's October 28, 1890 patent (No. 439,201) is very close in concept but differs in slight details. |
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