Ruling Pen

This 4-7/8" steel pen has twin blades whose line thickness is adjusted by a screw. The pen is not marked. Similar ruling pens first appeared in Europe at the beginning of the 18th century.
Reference: Maya Hambly, Drawing Instruments, 1580–1980 (London: Sotheby's Publications, 1988), 57–58.
Currently not on view
Object Name
date made
18th century
Physical Description
steel (overall material)
overall: .7 cm x 12 cm x .7 cm; 9/32 in x 4 23/32 in x 9/32 in
place made
ID Number
accession number
catalog number
Pens and Pencils
Science & Mathematics
Drawing Instruments
See more items in
Medicine and Science: Mathematics
Pens and Pencils
Data Source
National Museum of American History, Kenneth E. Behring Center

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