US Patent: 491,872
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| Sliding Friction Tongs
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Patentee:
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| Carlton W. Canfield (exact or similar names) - Winthrop, MN |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 19, 1892 |
| Granted: |
Feb. 14, 1893 |
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Patent Pictures:
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Carlton W. Canfield patent February 14, 1893 |
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Stan Schulz
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Description: |
| Pipe tongs with the set-screw adjustable pivot yoke beyond the gripping portion, similar to a nut cracker. A couple of alternate gripping surfaces are shown and described. |
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