US Patent: 497,618
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| Wrench
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Patentee:
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| Frederick Burns Wells (exact or similar names) - Montreal, QC Canada |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 01, 1892 |
| Granted: |
May 16, 1893 |
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Patent Pictures:
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Frederick B. Wells patent May 16, 1893 |
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Stan Schulz
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Description: |
| The center section of the movable jaw is a depressible locking sleeve with interior rack teeth that engage with rack teeth on the shank. A pair of compression springs within the movable jaw hold the sleeve against the shank. The arrangement allows for one-handed operation of the wrench.
Canadian patent CA-43,880 (August 10, 1893) is parallel for the same design. |
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