US Patent: 685,349
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| Wrench
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Patentee:
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| Frank T. Robinson (exact or similar names) - Chicago, IL |
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Patent Dates:
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| Applied: |
Oct. 26, 1900 |
| Granted: |
Oct. 29, 1901 |
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Patent Pictures:
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Frank T. Robinson patent Oct. 29, 1901 |
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Stan Schulz
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Description: |
| The edge of the main shank and facing inner surface of the movable jaw have fine rack teeth. A spring slide between the movable jaw and main shank acts as a wedge to set the adjustment.
Wrenches variously marked "CHICAGO WRENCH CO." and "MODEL GRIP / PAT. APL'D FOR" match this design. The MODEL GRIP wrench was announced to the hardware trade in late 1897 and early 1899. |
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