US Patent: 1,051,562
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| Wrench
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Patentees:
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| Pieter Joseph Crolla (exact or similar names) - Volkenburg, Netherlands |
| Peter Joseph Schmitz (exact or similar names) - Volkenburg, Netherlands |
| USPTO Classifications: |
| 81/64 |
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Patent Dates:
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| Applied: |
Sep. 19, 1911 |
| Granted: |
Jan. 28, 1913 |
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Patent Pictures:
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Pieter Joseph Crolla and Peter Joseph Schmitz patent January 28, 1913 |
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Stan Schulz
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Description: |
| Tapered flat spring steel bent to conform to the exterior of a "hex" nut or bolt head grips when moved in one direction, and relaxes sufficiently to allow a form of ratchet action when moved in the opposite direction.
Corresponding British patent GB-191127092 registered Dec. 4, 1911 makes reference to a 1910 German patent registration.
A wrench matching this design was described as "an ingenious German wrench" in a 1914 Popular Mechanics write-up. It is noted as the "Ce-Ha-We" ["C.H.W."] produced by Winterhoff in a 1917 German review of wrenches useful in relation to automobiles.
A known example is marked in both "inch" and metric sizes, with text in French - "PATENT POIGNE BREVETE." |
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