US Patent: 644,033
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Combined Spanner and Wrench
Combined Spanner and Sliding-Jaw Wrench
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Patentee:
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| Frederick Schrader (exact or similar names) - Bridgeport, CT |
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Patent Dates:
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| Applied: |
Dec. 04, 1899 |
| Granted: |
Feb. 20, 1900 |
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Patent Pictures:
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Frederick Schrader Pat. Feb. 20, 1900 |
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Stan Schulz
Schrader Combination Spanner & Wrench (FLICKR)
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Description: |
| The patent is an improvement on Schrader's May 11, 1897 adjustable spanner patent (no. 582,238). It adds an adjustable wrench with the second spanner "jaw" as a "tail" to the adjustable jaw. The wrench produced may be marked with both the 1897 and 1900 patent dates, or only May 11, 1897.
Another variant with a square stud or poll on the back angle of the fixed jaw includes a third patent date -- Oct. 18, 1898 -- corresponding to design patent no. D29,520. |
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