US Patent: 63,656
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| Improvement in Dividers and Calipers
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Patentee:
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| Sylvanus Sawyer (exact or similar names) - Fitchburg, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Apr. 09, 1867 |
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Ralph Brendler
Vintage Machinery entry for Sylvanus Sawyer
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Description: |
| This design for a compass joint features a center stem that turns to adjust the caliper width. This idea was improved by the inventor as patent #79,603 (7/8/1868). |
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