US Patent: 151,824
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| Improvement in Calipers
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Patentee:
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| James W. Barnastee (exact or similar names) - East Somerville, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 06, 1874 |
| Granted: |
Jun. 09, 1874 |
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Ralph Brendler
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Description: |
| These calipers use an unthreaded bar held in place by a set screw for coarse adjustment, and a small threaded bar set into the end of the unthreaded bar for fine adjustment. |
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