US Patent: 209,569
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| Wrench
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Patentee:
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| John W. Hyatt (exact or similar names) - Newark, NJ |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 07, 1878 |
| Granted: |
Nov. 05, 1878 |
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Patent Pictures:
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John W. Hyatt patent November 5, 1878 |
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Stan Schulz
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Description: |
| The adjusting worm runs against a concave threaded rack cut in the main shank. The adjusting worm rides in a pair of slots with compression springs, which allows the worm to be disengaged from the rack for quick as well as screw-adjustment.
Corresponding British patent GB-187803994 was registered Oct. 9, 1878; German patent DE-5692 was granted in the name of Isaiah Smith Hyatt who gave his address as Paris. |
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