US Patent: 207,709
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| Wrench
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Patentee:
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| Henry W. Brett (exact or similar names) - Boston, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 15, 1878 |
| Granted: |
Sep. 03, 1878 |
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Patent Pictures:
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Henry W. Brett patent September 3, 1878 |
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Stan Schulz
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Description: |
| The angle of the head to the handle is adjustable, and the head has a movable jaw adjustable by a rack and gear wheel. A sliding pawl in the handle can engage or release the gear wheeel. With the pawl engaged, the wrench works as a self-adjusting nut wrench. |
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