US Patent: 1,437,774
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| Wrench
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Patentees:
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| John C. Piechocki (exact or similar names) - Buffalo, NY |
| Edmund K. Boinski (exact or similar names) - Buffalo, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 11, 1921 |
| Granted: |
Dec. 05, 1922 |
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Patent Pictures:
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John C. Piechocki and Edmund K. Boinski patent December 5, 1922 |
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Stan Schulz
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Description: |
| Twin spring-loaded pawls in the movable jaw engage racks or a series of holes in the main shank. In one version, the pawls terminate in pins that engage the series of holes. In the second version, the pawls have small worm screws engaging racks on the main bar, which allow for finer adjustment. |
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