US Patent: 1,423,723
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| Adjustable Wrench
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Patentee:
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| William Alexander Martin (exact or similar names) - Commercial Cross, PE Canada |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 10, 1921 |
| Granted: |
Jul. 25, 1922 |
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Patent Pictures:
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William Alexander Martin patent July 25, 1922 |
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Stan Schulz
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Description: |
| The movable jaw has a swinging lower section with a tooth that engages a rack on the shank. For the pipe wrench version, the rack is a separate piece that can be advanced or backed off by the rocking action of the handle. |
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