US Patent: 65,654
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| Improvement in Compasses used in Caulking Seams
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Patentee:
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| George Dowling (exact or similar names) - Fair Haven, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Jun. 11, 1867 |
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Ralph Brendler
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Description: |
| This set of calipers features a second adjustable arm, allowing it to lay out an additional distance from the scribed mark. This was designed to be used by shipbuilders to mark the caulking distance for two adjoining boards in the hull. |
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