A combination square is a multi-purpose measuring and marking tool used in woodworking, metalworking and stonemasonry, built from a graduated rule fitted with one or more interchangeable heads that slide along and lock onto it. Its standard head marks and checks both 90-degree and 45-degree angles against a true edge, and swapping in a protractor head or a center-finding head extends the same rule to angle layout or to finding the center of round stock, letting one tool stand in for several single-purpose squares.
Facts
Introduced When (Circa)Invented in the late 1870s, patented 1879 (Laroy S. Starrett) 1 OriginThe modern combination square was invented in the late 1870s by American inventor Laroy S. Starrett, patented in 1879; Starrett founded the L. S. Starrett Company in Athol, Massachusetts in 1880, and the tool, originally designed for machinists, later spread to woodworking and other trades. 1 Introduced era (class) Connections
Used In
Combination Square is used in Woodworking.
In the Other Atlases
Sources
1. Combination Square (Wikipedia)
Wikimedia FoundationHistory section, Starrett invention sentence
the modern combination square was invented in the late 1870s by American inventor Laroy S. Starrett, and patented in 1879.
History section, Starrett invention sentence (origin detail)
the modern combination square was invented in the late 1870s by American inventor Laroy S. Starrett, and patented in 1879.
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