US Patent: 70,605
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Improvement in wrenches Wrench for Carriages and Other Purposes
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Patentee:
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Edward Perry (exact or similar names) - Hopkinton, MA |
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Patent Dates:
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Granted: |
Nov. 05, 1867 |
Patent Pictures:
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Edward Perry patent Nov. 5, 1867 |
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Stan Schulz
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Description: |
The jaws are adjusted by a single screw with a large center knurl, left-hand threads for one jaw, and right-hand threads for the other. |
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