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US Patent: 65,654
Improvement in Compasses used in Caulking Seams
Patentee:
George Dowling - Fair Haven, CT

USPTO Classifications:
33/558.2

Tool Categories:
layout tools : compasses
trade specific : shipwright

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
William H. Stowe
Henry E. Parder
J. M. Blumington
Jas. A. Service

Patent Dates:
Granted: Jun. 11, 1867

Patent Pictures:
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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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