US Patent: 108,747
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| Wrench
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Patentee:
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| Edward J. Worcester (exact or similar names) - Worcester, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Oct. 25, 1870 |
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Patent Pictures:
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Edward J. Worcester Pat. Oct. 25, 1870 |
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Stan Schulz
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Description: |
| The ferule and bearing step for the adjusting screw are threaded and screw onto the main bar. The bearing step is tapped and threaded for a pintle screw which can be screwed in far enough to jam the adjusting knurl against the "shoulder" on the main bar, effectively locking the adjustment. |
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