CA Patent: CA-10,613
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| Improvements on wrenches
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Patentees:
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| Austin Demmons Cable (exact or similar names) - Montreal, QC Canada |
| Joseph Warren Calef (exact or similar names) - North Easton, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 21, 1879 |
| Granted: |
Nov. 05, 1879 |
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Patent Pictures:
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Calef*s Improved Grab Wrench and Pipe-Wrench Combined. J. W. Calef patent Nov. 11, 1879 |
CIPO Data
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Stan Schulz
Search Canadian Patents 1869-1894
10,613 in Canadian Patents Database
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Description: |
| Self-adjusting wrench shown with smooth jaws for nuts and serrated jaws for gripping pipe; the counterpart U.S. patent (no 226,490 issued April 13,1880) and Calef's subsequent improvement patent (U.S. no. 273,461 issued March 6, 1883) are shown on the tool as produced.
Calef describes his occupation as Mechanical Engineer; the specifications are written in first person singular with Calef as the claimant. Austin Demmons Cable appears only on the cover sheet; he is listed as assignee on the U.S. patent.
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