US Patent: 741,394
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Wrench
Wrenches For Grasping Pipes, Rods or Nuts
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Patentee:
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| John Bystrom (exact or similar names) - Chicago, IL |
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Patent Dates:
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| Applied: |
Dec. 03, 1902 |
| Granted: |
Oct. 13, 1903 |
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Patent Pictures:
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John Bystrom patent October 13, 1903 |
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Stan Schulz
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Description: |
| A cam-action extension on the handle operates a movable jaw in relation to the fixed jaw. Two alternate jaw forms are shown. Both forms appear with the marking "ALLEN WRENCH / PAT APPLD." The simpler "alligator wrench" form is nominal 8 inch; the "hook jaw" form is nominal 18 inch; a 1903 trade announcement listed three sizes (8 inch, 14 inch and 24 inch.)
Norwall Mfg. produced steam related products with the "ALLEN" brand name.
Corresponding British patent GB-190322699 was registered Oct. 20, 1903. |
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