US Patent: 531,817
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| Precision-index
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Patentee:
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| Herbert C. Warren (exact or similar names) - Hartford, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 11, 1894 |
| Granted: |
Jan. 01, 1895 |
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Jeff Joslin
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Description: |
| "This invention relates to machines for the manufacture of precision-indexes, the object of the invention being to furnish an improved machine adapted for producing corrected or precision index of the class used on gear-cutting and graduating-machines, and for astronomical instruments and like purposes, with economy and rapidity and with the utmost accuracy." |
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