US Patent: 305,027
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| Wrench
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Patentee:
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| Edmond H. St. John (exact or similar names) - Toledo, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 10, 1884 |
| Granted: |
Sep. 09, 1884 |
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Patent Pictures:
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Edmond H. St. John patent September 9, 1884 |
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Stan Schulz
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Description: |
| The quick-adjust movable jaw has interior teeth that engage a rack on the main bar, and a leaf spring to pull the teeth and rack together. The distinctive shape of the leaf spring is a major component of the patent. |
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