Ship Curve, Possibly by Blue and White Company

This plastic drawing curve is rounded at the bottom and forked at the top. A mark stamped near the bottom reads: EXACT (/) CELLULOID. The EXACT is in quotation marks, with the first quotation mark a subscript, as is common in German. A mark stamped at the center shows a triangle, a T-square and a drawing template. Text on the template reads in part: BLUE.
The donor, Sebastian J. Tralongo (1928–2007), served in the U.S. Navy during World War II and then worked for the Vitro Corporation in Rockville, Md., for 35 years. He patented a device for signaling from deeply submerged submarines. The object was received at the Smithsonian in 1980. Another object received from Tralango was a Standardgraph template, and sold by the Blue and White Company. The German firm of Standardgraph Filler and Fiebig in the Bavarian town of Geretsried applied for trademark for the term Standardgraph for curved rules in 1971 and received it in 1974. Blue and White are the colors of Bavaria.
Accession file
“Standardgraph,” TESS, U.S. Patent and Trademark Office, accessed August 1, 2016.
"Tralongo, Sebastian James 'Subby'," Hartford Courant, May 26, 2007.
Sebastian J. Tralongo, "Submarine Signal Device" (U.S. Patent 2,989,024 issued June 20, 1961).
"Vitro Corp. – Company Profile,"
Currently not on view
date made
ca 1950-1975
place made
Physical Description
celluloid (overall material)
overall: .2 cm x 37 cm x 14.7 cm; 3/32 in x 14 9/16 in x 5 25/32 in
ID Number
accession number
catalog number
Credit Line
Gift of Sebastian J. Tralongo
Drawing Instruments
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History


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