US Patent: 395,431
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Wrench
Improvements in Monkey Wrenches
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Patentee:
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| George E. Franklin (exact or similar names) - Natick, MA |
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Patent Dates:
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| Applied: |
Apr. 23, 1888 |
| Granted: |
Jan. 01, 1889 |
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Patent Pictures:
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George E. Franklin patent January 1, 1889, and Franklin*s Never-Slip Wrench |
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Stan Schulz
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Description: |
| "This invention ... consists in a compound-lever attachment by which a gripping-plate pivotally affixed upon the movable jaw is to be actuated and pressed more firmly against the object to be grasped."
8, 10, and 12-inch sizes advertised in the January 1893 "Machinists' Price Current" as Franklin's Never-Slip Wrench.
A known example is the jaw and lever, separate from a wrench frame. The jaw is set up as a pipe grip rather than the smooth nut wrench jaw shown in the patent drawings. |
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