US Patent: 809,858
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| Wrench
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Patentee:
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| Francis Marion Straube (exact or similar names) - Boulder, CO |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 11, 1905 |
| Granted: |
Jan. 09, 1906 |
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Patent Pictures:
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Francis M. Straube Pat. Jan. 9, 1906 |
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Stan Schulz
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Description: |
| The shaft holding the adjusting collar is hinged at the jaw; a swinging hook latches around the shank to hold it in position. A flat tension spring in the handle works against the end of the adjusting worm's shaft. The adjusting collar is threaded internally and screws on the rod it rides on. |
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