US Patent: 178,162
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| Wrench
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Patentee:
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| Edward H. Knight (exact or similar names) - Philadelphia, PA |
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Patent Dates:
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| Applied: |
Mar. 31, 1876 |
| Granted: |
May 30, 1876 |
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Patent Pictures:
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Edward H. Knight Pat. May 30, 1876 |
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Stan Schulz
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Description: |
| The wrench combines a screw-adjusting movable jaw with a "fixed" jaw that can be held in position by an auxiliary handle, or released to move against a tensioning spring. The resulting freedom of motion allows "ratchet" type action in restricted spaces.
Corresponding British patent GB-187602550 was granted June 20, 1876.
Ken Cope's "American Wrench Makers 1830-1930" cites an 1877 "Iron Age" listing for Knight's Ratchet Screw Wrench, and the June 1988 issue of the Missouri Valley Wrench Club Newsletter reprints a patent summary and "new product announcement" from 1876 issues of "Iron Age." One account of the 1876 "Philadelphia World's Fair" notes this wrench among the wrenches displayed. |
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