US Patent: 37,459
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Wrench
Improvement in Wrenches
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Patentee:
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| Norton Porter (exact or similar names) - Youngstown, NY |
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Patent Dates:
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| Granted: |
Jan. 20, 1863 |
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Patent Pictures:
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Norton Porter patent January 20, 1863 with nominal six-inch example. |
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Stan Schulz
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Description: |
| An eccentric cam on the adjustable jaw pushes a toothed slide against serrations on the shank to hold the adjustment.
Ken Cope's "American Wrench Makers 1830-1930" cites a contemporary advertisement for Porter's Adjustable Wrench. |
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