US Patent: 170,492
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| Improvement in Wrenches
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Patentee:
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| Henry Port (exact or similar names) - Stapleton, NY |
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Patent Dates:
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| Applied: |
Jan. 04, 1875 |
| Granted: |
Nov. 30, 1875 |
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Patent Pictures:
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Henry Port Pat. November 30, 1875 |
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Stan Schulz
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Description: |
| The movable jaw slides on parallel rods and is adjusted by a screw connected to the handle. The thrust against the jaw would be transferred to the main shank by two retaining pins.
Known examples marked only with the patent date.
The basic frame appears in modified form in Port's Dec. 11, 1883 Combination Tool patent no. 290,106. |
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