US Patent: 42,903
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| Wrench
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Patentees:
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| I. Schwartzkopff (exact or similar names) - Berlin, Kingdom of Prussia |
| E. Kaselowsky (exact or similar names) - Berlin, Kingdom of Prussia |
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Patent Dates:
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| Granted: |
May 24, 1864 |
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Patent Pictures:
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Schwartzkopff & Kaselowsky Pat. May 24, 1864 |
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Stan Schulz
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Description: |
| The patent is for a self-adjusting mechanism using a linking bar, an eccentric on the end of a pivoting handle, and a sliding jaw. The specifications note the jaw faces could be smooth for nuts or have gripping teeth for pipe. This is the first U.S. wrench patent from a European patentee. Kaselowsky likely was the German patent attorney / agent.
Corresponding British patent GB-186300945 was registered April 21, 1863. Schwartzkopf produced the single opening version in Berlin. A known example is marked " PATENT L. SCHWARTZKOPFF BERLIN"
Schwartzkopf's Adjusting Spanner (the name appears with one or two "Fs") was produced in Britain by the Argus Works of Sheffield. A modification to allow locking the adjustment was proposed in British patent GB-188502260 registered Feb. 19, 1885.
Schwartzkopff's self-adjusting wrench patents (this design in both single- and- double opening styles, and an earlier version with teeth on one jaw and matching teeth on a swinging handle) were noted in German trade and technical journals in the early 1860s. 1864 items in DINGLER'S POLYTECHNISCHES JOURNAL describe the wrench and list 3 sizes of Schwartzkopff's Universal-Schraubenschlussel. |
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