US Patent: 296,540
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Wrench
EUREKA ALLIGATOR PIPE TONG OR WRENCH
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Patentee:
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| Dwight Morse De Silva (exact or similar names) - Corning, NY |
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Patent Dates:
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| Applied: |
Dec. 04, 1883 |
| Granted: |
Apr. 08, 1884 |
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Patent Pictures:
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Dwight Morse De Silva patent April 8, 1884 |
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Stan Schulz
De Silva's Wrench - May 17, 1884 Scientific American
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Description: |
| The set screw adjusts the size range of the opening. The cams on the inner end of the handle provide the final gripping bite.
The comparable Canadian patent is no. CA-20,659 issued Nov. 29, 1884.
Contemporary advertising shows P. Lowentraut Mfg. of Newark, N.J. produced this as the "EUREKA" pipe tongs in four sizes. |
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