US Patent: 288,713
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| Wrench
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Patent Dates:
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| Applied: |
Aug. 23, 1883 |
| Granted: |
Nov. 20, 1883 |
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Patent Pictures:
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John Lee patent November 20, 1883 |
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Stan Schulz
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Description: |
| The movable jaw has an internal wedge which forces a rack on the jaw to engage a rack on the shank. The toggle at the base of the movable jaw has a pitched slot which tightens and loosens the wedge.
The corresponding Canadian patent (no CA-18,493) was issued Jan. 21, 1884.
According to Ken Cope's "American Wrench Makers, 1830-1930," this patent along with Barney Ross' April 15, 1884 patent (no. 296,877) was the basis for a quick-adjusting nut wrench produced by the Sterling Wrench Company. |
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