US Patent: 162,500
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| Wrench
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Patentee:
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| Julius Rost (exact or similar names) - Allegheny, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 23, 1874 |
| Granted: |
Apr. 27, 1875 |
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Patent Pictures:
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Julius Rost Pat. April 27, 1875 |
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Stan Schulz
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Description: |
| The adjustment is made by a screw-rod with partial threads, and an "arm" to move it. A quarter-turn engages or disengages the threads from the movable jaw. |
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