DE Patent: DE-49,182
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| Verstellbarer Schraubenschlüssel
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Patentee:
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| Albert Wagner (exact or similar names) - Radevormwald, Germany |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 01, 1889 |
| Granted: |
Oct. 23, 1889 |
| Antedated: |
Jan. 01, 1889 |
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Patent Pictures:
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German patent 49182 - image edited |
Espacenet patent
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Stan Schulz
German patent 49182 in ESPACENET
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Description: |
| Movable jaw adjustment by geared adjusting "rosettes." The threads on both shafts are the same pitch; one has "right hand" travel and the other "left hand" travel. The overall style resembles "French" forms. The secondary shaft keeps the jaws aligned.
In 1889, Wagner was advertising a similar wrench with the main screw (turned by the handle as in "French style") having left- and right-hand threads, both jaws "travel," and the side shaft threaded at a pitch sufficient to match the combined travel of both jaws. |
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