US Patent: 1,731,954
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| Calipers
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Patentee:
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| Emil J. Tjurnlund (exact or similar names) - St. Paul, MN |
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Patent Dates:
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| Applied: |
Dec. 12, 1927 |
| Granted: |
Oct. 15, 1929 |
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Patent Pictures:
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Ralph Brendler
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Description: |
| This set of calipers uses an unusual "collar" locking mechanism for the legs, as well as a very interesting micro-adjust feature on one point.
Known examples are marked with the patent number as well as "Reiner and Campbell Quickset". The production tools do not have the micro-adjust feature. |
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