US Patent: 581,823
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| Adjustable Spanner For Cyclists, & c.
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Patentee:
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| John Harrison (exact or similar names) - Peterborough, England |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 14, 1896 |
| Granted: |
May 04, 1897 |
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Patent Pictures:
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John Harrison patent May 4, 1897 |
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Stan Schulz
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Description: |
| The central adjusting worm changes the size of both openings; as one closes the other opens.
The design sought British patent protection at the same time; three names appear in the account of proposed British 1897 patent no. GB-189714386 in the June 18, 1897 THE ENGINEER. A listing in an 1897 British trade journal suggests this was marketed as the PETERBOROUGH SPANNER. |
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