US Patent: 523,810
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| Pipe Wrench
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Patentee:
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| Charles Hall (exact or similar names) - New York, NY |
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Patent Dates:
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| Applied: |
Mar. 05, 1894 |
| Granted: |
Jul. 31, 1894 |
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Patent Pictures:
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Charles Hall Pat. July 31, 1894 |
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Stan Schulz
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Description: |
| This version of Hall's pipe wrench has the adjusting screw extending outside the frame, and a limit stop screw in the hook jaw. The extended adjusting screw appears in the smallest version of Hall's wrench, the 5 1/2" long "Bicycle Wrench" which came on the market in 1896.
Canadian patent CA-45,993 and British patent GB-189405231 registered March 13, 1894 correspond to this patent.
The other four U.S. patents relating to Hall's wrench are 516,485 (3/13/1894), 521,312 (6/12/1894), 553,295 (1/29/1895), and 586,738 (7/20/1897). |
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