US Patent: RE9,310
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Self-Adjusting Watch Key
Improvement in an Adjustable Holding Device and Watch-Key
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Patentee:
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| John S. Birch (exact or similar names) - Orange, NJ |
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Patent Dates:
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| Applied: |
Jun. 11, 1880 |
| Granted: |
Jul. 20, 1880 |
| Reissue Information: |
| Reissue of 88,836 (Apr. 13, 1869) |
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Patent Pictures:
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J.S. Birch Reissue Pat*d July 20, 1880 |
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Stan Schulz
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Description: |
| The spring-loaded jaws open when the opposite end is pushed in. The specifications for the reissue expand on the potential uses compared to the original patent.
The reissue is roughly co-terminous with an 1880 Scientific American advertisement for Birch's Self-Adjusting Watch Key reprinted in Ken Cope's "American Wrench Makers 1830-1930." |
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