US Patent: 86,534
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| Improvement in Screw-Wrench
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Patentee:
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| Charles Hall (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Feb. 02, 1869 |
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Patent Pictures:
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Charles Hall Pat. Feb. 2. 1869 |
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Stan Schulz
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Description: |
| A sliding wedge on the back side of the movable jaw allows lateral movement of the jaw to engage or disengage the threaded portion of the jaw from the adjusting screw. |
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