US Patent: 228,958
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| Calipers and Dividers
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Patentee:
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| William H. Warren (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 22, 1879 |
| Granted: |
Jun. 15, 1880 |
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Ralph Brendler
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Description: |
| This design features a slotted arm attached to a threaded rod. The slotted arm holds a clamping screw for coarse adjustment, enad the threaded rod engages a nut for fine adjustment |
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