US Patent: 164,100
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| Dynamic Wrench
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Patentee:
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| Sebastian Plymale (exact or similar names) - Portland, OR |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 25, 1875 |
| Granted: |
Jun. 08, 1875 |
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Patent Pictures:
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Sebastian Plymale Pat. June 8, 1875 |
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Stan Schulz
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Description: |
| An internal set of levers, springs, and ratchet head converts movement of the ratchet head to an indication of force on a dial indicator. The wrench has a locking pin for the ratchet head, and a screw to pre-set the dial indicator. There is no provision for calibration. |
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