US Patent: 501,462
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| Wrench
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Patentee:
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| Alfred A. Hull (exact or similar names) - Knoxville, TN |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 21, 1892 |
| Granted: |
Jul. 11, 1893 |
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Patent Pictures:
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Alfred A. Hull patent July 11, 1893 |
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Stan Schulz
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Description: |
| Quick adjust design, with a toothed dog on the movable jaw engaging rack teeth on the shank. A pivoting eccentric shifts the dog into and out of engagement with the shank. The movable jaw has a rocking grip surface which is pushed into gripping engagement by a spring which also pushes on the adjustment dog. |
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