US Patent: 588,906
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| Monkey Wrench
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Patentees:
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| Charles H. Harvey (exact or similar names) - Philadelphia, PA |
| Marmer Duke Archer (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 03, 1897 |
| Granted: |
Aug. 24, 1897 |
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Patent Pictures:
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Charles H. Harvey and Marmer Duke Archer patent August 24, 1897 |
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Stan Schulz
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Description: |
| The adjustable jaw is moved by a screw-threaded shaft that extends the length of the wrench with a knob at the end of the handle. The shaft is semi-enclosed in a recess in the back of the main shank.
The inner portion of the movable jaw has an opening corresponding to the cross-section of the main shank. |
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