US Patent: 286,842
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| Wrench
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Patentee:
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| Granville W. Pittman (exact or similar names) - Keokuk, IA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 20, 1883 |
| Granted: |
Oct. 16, 1883 |
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Patent Pictures:
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Granville W. Pittman patent October 16, 1883 |
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Stan Schulz
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Description: |
| The cam-blocks in the jaws tighten their grip when shifted. The quick-adjust shank of the movable jaws is held in position by a rocking toothed lever in the end of the handle. The lever is actuated by a swinging arm with a small roller on the end.
Munn & Co. - patent attorneys |
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