US Patent: 127,902
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Improvement in Dynamometer-Wrenches
Improvement in Balance or Indicator Wrench
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Patentee:
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| Harvey Reid Leonard (exact or similar names) - Portland, OR |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Jun. 11, 1872 |
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Patent Pictures:
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H. R. Leonard Pat. June 11, 1872 |
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Stan Schulz
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Description: |
| The patent is for a tension-adjustable ratchet pawl which would slip when the strain reached a pre-determined limit. The patent shows the principle applied to both open-end and box-end wrenches. It would accomodate a range of sizes by the use of adjusting sleeves. The specifications describe this in use tensioning rods in bridge trusses, straining rigging on sailing vessels, or as a dynamometer. |
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