US Patent: 256,062
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| Calipers
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Patentee:
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| Edward C. Smith (exact or similar names) - Brooklyn, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 19, 1881 |
| Granted: |
Apr. 04, 1882 |
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Patent Pictures:
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1 | 2
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Ralph Brendler
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Description: |
| These calipers use an adjustable worm gear mounted on one arm that engages teeth cut into the end of the other. |
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