US Patent: 317,923
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| Wrench
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Patentee:
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| Amos Call (exact or similar names) - Springfield, MA |
| USPTO Classifications: |
| 81/93 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 25, 1884 |
| Granted: |
May 12, 1885 |
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Patent Pictures:
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Amos Call patent May 12, 1885 |
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Stan Schulz
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Description: |
| The patent describes a combination pipe and nut wrench where the movable jaws have a common adjusting nut on the central shank, and where the pipe jaw has a range of lateral motion with the jaw being forced outward by a compression spring in the body of the movable nut jaw.
In parallel patent 317,924 only one of the jaws engages with the adjustment screw. |
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