US Patent: 455,645
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| Bolt-Grip
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Patentee:
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| Thomas Spriggs (exact or similar names) - Little River, KS |
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Patent Dates:
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| Applied: |
Dec. 02, 1890 |
| Granted: |
Jul. 07, 1891 |
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Patent Pictures:
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Thomas Spriggs patent July 7, 1891 |
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Stan Schulz
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Description: |
| The side jaws are tightened by separate thumb screws or the like. The central spur is tightened by a crank handle. The tool's primary use is to hold countersunk headed wagon and carriage tire bolts. It could also be made to function as a nail puller or as a pipe wrench.
Known examples marked "SPRIGGS & TROYER BOLT GRIP PAT JUL. 7, 1891 LITTLE RIVER KANS" appear to have been hand-made. The crank handle and body of the tool are brass castings. |
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