US Patent: 431,702
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Gage
Multi-Jaw Vernier Caliper
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Patentee:
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| William Littlely (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 09, 1890 |
| Granted: |
Jul. 08, 1890 |
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Ralph Brendler
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Description: |
| This caliper features a pair of individually adjustable jaws, each with their own vernier scale. The patented feature here is the reference edge for the vernier is adjustable, allowing the jaws to be reground when worn and still be able to measure accurately. |
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