US Patent: 291,934
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| Wrench
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Patentee:
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| Daniel R. Porter (exact or similar names) - Revere, MA |
| USPTO Classifications: |
| 81/99 |
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Patent Dates:
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| Applied: |
Nov. 19, 1883 |
| Granted: |
Jan. 15, 1884 |
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Patent Pictures:
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Daniel R. Porter patent January 15, 1884 |
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Stan Schulz
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Description: |
| The wrench has a spring pushing a movable jaw into gripping engagement with the work piece. The specifications call it an improvement on Porter's previous application (issued as pat. no. 291,933).
In the wrench as produced, the spring is fastened to the end of the movable jaw, and slides on the wrench shank. This arrangement appears in Canadian patent CA-20,932.
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