US Patent: 325,503
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| Wrench
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Patent Dates:
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| Applied: |
Jun. 16, 1885 |
| Granted: |
Sep. 01, 1885 |
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Patent Pictures:
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1 | 2
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Roswell F. Cook patent September 1, 1885 |
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Description: |
| A spring-tensioned swinging auxiliary handle (called the "clamping lever" in the specifications) provides the nut-gripping surface within the box end.
Produced with a single open end wrench on the end of the handle; a contemporary ad lists three sizes: 7/8 inch, 1 inch and 1 1/8 inch. |
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