DE Patent: DE-336,765
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| Schnellspannvorrichtung als Schraubenschlüssel, Schraubstock u. dgl.
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Patentee:
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| Robert Schäfer (exact or similar names) - Erfurt, Germany |
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Patent Dates:
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| Granted: |
May 14, 1921 |
| Antedated: |
Apr. 29, 1919 |
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Patent Pictures:
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Germant patent 336,765 - edited drawing |
Espacenet patent
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Stan Schulz
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Description: |
| Machine translation; "Quick-release device such as a wrench, vice, etc. Quick-clamping wrenches of such a nature have become known that when the handle is turned, the movable jaw is automatically released during unclamping by a limited movement of an intermediate link provided with threaded strips, but its free-hand adjustment is canceled again during tightening."
Wrench produced under this patent marketed as "RAPID", along with a round-headed sliding wedge-adjust wrench {DE-340,985 } marketed as "VELOX." The ads showing these wrenches identify sellers rather than the manufacturer.
Comparable U.S. patent 1,382,247 includes provisions for employing a version of this adjustment means for a bench vise; that aspect is addressed in German patent DE-336,796.
Note: some machine translation with transliterate "Schäfer" into "Schaefer." |
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