Fairgate 155-T T-Square

This 27" aluminum and plastic T-square has scales of inches along both sides of the handle. One scale is divided to 1/8" and the other is divided to 1/16". Both scales are numbered by ones from 1 to 24. The end of the handle has a hole for hanging. The handle is marked: FAIRGATE 115–T. It is also marked: COLD SPRING, N.Y. 10516 MADE IN U.S.A.
The blue plastic crosspiece has holes in its interior. The lower edge of the crosspiece is marked with a scale of units slightly longer than one inch, divided to eighths and numbered by ones from 1 to 5 on both sides of the handle. The back of the crosspiece is marked: FAIRGATE (/) COLD SPRING NY (/) MADE IN U.S.A.
This instrument was found in the collections in 1984. The Fairgate Rule Company began manufacturing high-quality aluminum scale rules, T-squares, L-squares, templates, and curves in Cold Spring, N.Y., in 1946 and remains in business as of 2013. This particular T-square is now sold as model number 63-124 for $14.10.
Reference: Fairgate Rule Company, "Frequently Asked Questions," https://fairgate.com/Frequently-Asked-Questions_ep_42-1.html.
Currently not on view
Object Name
date made
Fairgate Rule Company Inc..
Physical Description
aluminum (overall material)
plastic (overall material)
overall: 68.7 cm x 35.6 cm x 1.5 cm; 27 1/16 in x 14 1/32 in x 19/32 in
place made
United States: New York, Cold Spring
ID Number
accession number
catalog number
Squares and Triangles
Science & Mathematics
Drafting, Engineering
Drawing Instruments
See more items in
Medicine and Science: Mathematics
Squares and Triangles
Data Source
National Museum of American History, Kenneth E. Behring Center

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