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US Patent: 45,535
Improvement in Angle-Protractors
Parallel Rule with Protractor
Patentee:
Henry Taylor - Fortress Monroe, VA

USPTO Classifications:
33/431

Tool Categories:
rules
layout tools : protractors

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Wm. F. McNamara
M. M. Livingston
J. P. Hall

Patent Dates:
Granted: Dec. 20, 1864

Patent Pictures:
USPTO pdf tiff
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Description:
This is a typical parallel ruler as used for shipboard navigation, with the added convenience of a built-in protractor for laying off vectors.

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