US Patent: 803,319
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| Wrench
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Patentee:
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| Frederick Zwicker (exact or similar names) - Indianapolis, IN |
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Patent Dates:
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| Applied: |
Jun. 10, 1904 |
| Granted: |
Oct. 31, 1905 |
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Patent Pictures:
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Frederick Zwicker Pat. Oct. 31. 1905 |
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Stan Schulz
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Description: |
| The two halves of the tongs or piers-like wrench have a shifting pivot point with the adjustment held by facing interlocking teeth. Produced in both pipe and nut gripping versions marked with a bold "Z." The initial hardware trade announcements listed the nut wrench in 10 and 12-inch sizes.
The nut wrench version is #550 in "Antique and Unusual Wrenches" by Schulzes, and the pipe wrench version is #732. |
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