US Patent: 415,183
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| Wrench
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Patentee:
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| Vincent J. McDonnell (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 23, 1889 |
| Granted: |
Nov. 12, 1889 |
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Patent Pictures:
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Vincent J. McDonnell patent November 12, 1889 |
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Stan Schulz
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Description: |
| Improvement to patent no. 402,265, for a combination quick and screw adjustment for the sliding jaw of a "monkey wrench." The adjusting pawl has a partial thread that engages a rack on the shank. The adjusting pawl can be turned to allow the jaw to slide freely.
Parallel Canadian patent CA-33,033 was granted Dec. 4, 1889. Subsequent improvement patents are 449,129 and 538,841. |
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