US Patent: 325,010
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| Wrench
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Patentee:
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| Daniel R. Porter (exact or similar names) - Revere, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 08, 1885 |
| Granted: |
Aug. 25, 1885 |
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Patent Pictures:
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Daniel R. Porter patent August 25, 1885 |
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Stan Schulz
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Description: |
| The quick adjust jaw is connected to the main bar by an intermediate frame. A leaf spring in the frame holds the jaw's adjustment, and a second leaf spring on the main bar holds the intermediate frame and jaw assembly in gripping position. |
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