US Patent: 293,984
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| Adjustable Wrench
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Patentee:
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| Alphonso B. Smith (exact or similar names) - San Francisco, CA |
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Patent Dates:
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| Applied: |
Apr. 18, 1883 |
| Granted: |
Feb. 19, 1884 |
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Patent Pictures:
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Alphonso B. Smith patent February 19, 1884 |
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Stan Schulz
Alphonso B. Smith (bio.)
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Description: |
| A left- and right-handed threaded shaft moves the jaws toward and from a common center. The patent presents single and double handled versions, with the jaws held either by a slotted back or a guide rod. One possible use for this design is as a tap wrench.
A known example has double handles, with the jaws held by a guide rod. |
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