R. Patten Theodolite

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This theodolite, marked "R. Patten N. York," dates from the period 1813–1833, when Richard Patten was in business in New York. The horizontal circle and vertical arc are graduated every 30 minutes, and read by verniers to 2 minutes. The compass on English instruments of this sort reads clockwise; here it reads counterclockwise. The number '6' in a diamond engraved on the baseplate may be a serial number.
Ref.: D. J. Warner, "Richard Patten (1792–1865)," Rittenhouse 6 (1992): 57–63.
Currently not on view
Patten, Richard
place made
United States: New York, New York
overall: 12 1/2 in; 31.75 cm
horizontal plate: 7 in; 17.78 cm
vertical arc: 6 in; 15.24 cm
needle: 4 in; 10.16 cm
telescope: 13 1/2 in; 34.29 cm
striding level: 5 in; 12.7 cm
overall in case: 15 in x 8 7/8 in x 8 5/8 in; 38.1 cm x 22.5425 cm x 21.9075 cm
ID Number
catalog number
accession number
Credit Line
Millard Guy Smallwood
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Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History


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