US Patent: 206,733
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| Wrench
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Patent Dates:
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| Applied: |
Dec. 29, 1877 |
| Granted: |
Aug. 06, 1878 |
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Patent Pictures:
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H. H. Hill Pat. Aug. 6, 1878 |
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Description: |
| This malleable iron adjustable wrench has the shank with the hammer head & jaw sliding through a loop on the back of the second jaw. The drawing shows the shank with the head having half-circle threads that are engaged by the adjusting nut. Known examples marked "PAT*D AUG 6, 78" have the adjuster enclosed in a loop, with threads all around the shank of the movable jaw. It is assumed Hill made the wrench.
An adjusting nut & threaded half-circle shank similar to the one shown in this patent appear on adjustable malleable iron wrenches marked with patent dates corresponding to Byron C. Bradley's patents (nos. 140,111 & 155,139). |
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