DE Patent: DE-65,962
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Sellbstthätig verstellbarer Schraubenschlüssel
"CAM" Schraubenschlüssel
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Patentee:
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| Charles Maynard (exact or similar names) - Herstal-Lez-Liege, Belgium |
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Patent Dates:
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| Granted: |
Dec. 06, 1892 |
| Antedated: |
May 13, 1892 |
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Patent Pictures:
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German patent 65962 - composite image edited |
Espacenet patent
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Stan Schulz
DE-65962 in ESPACENET
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Description: |
| The position of the movable jaw holds due to friction with the sides of the shank. The shank's profile may be trapezoidal, oval, etc. Known examples are marked with a size designation and "CAM - Depose."
Manufacturer attribution from Ron Geesin's entry on "C.A.M. Automatic Wrench Syndicate", vol. 2, pg. 42 of THE ADJUSTABLE SPANNER. C.A. Maynard was British; his manufacturing plant was in Belgium. An 1898 GOLDACKER & NESSELRODE (Berlin) ad in "Berliner Tageblatt" lists 5 sizes of the oval-shanked "CAM" Schraubenschlüssel.
Corresponding patents: British patent GB-189217111 effective Sept. 24, 1892. Swiss patent CH-5982, published May 31, 1893.
German patent Klasse 87 (a) Gruppe 9. |
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