US Patent: 680,742
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| Spanner or Pipe Wrench
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Patentee:
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| David Stewart (exact or similar names) - Govan, Scotland |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 15, 1901 |
| Granted: |
Aug. 20, 1901 |
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Patent Pictures:
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David Stewart Pat. August 20, 1901 |
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Stan Schulz
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Description: |
| The hook jaw is carried on a frame with a worm-screw that engages teeth on the handle shank. The shank on which the worm screw rides is held in position with a spring which allows the worm screw to be disengaged from the rack teeth for rapid adjustment. The sides of the carrier frame ride in channels in the sides of the shank. |
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