Sterling 544 Protractor and Drawing Instrument

Description
This clear plastic semicircular protractor is contained within an irregularly shaped piece of plastic that features a French curve at the top, two triangles (of 60° and 45°) on the sides, and a 5-1/2" scale along the bottom.
The scale is divided to 16ths of an inch and is marked by single inches from 1" to 5". The protractor is divided to single degrees and marked by tens from 10° to 90° to 170° and from 170° to 90° to 10°. A semicircular slot separates the protractor from the French curve. Cut-out stencils for six circles range in diameter from 1/8" to 7/16". Also included are two slots for drawing angles of 30° and 45° and templates for an equilateral hexagon and two closed curves. On the curve the object is marked: SP [/] PROTRACTOR – FRENCH CURVE – TRIANGLES – RULER – CIRCLE GAUGES. Between the protractor and scale, the object is marked: MADE IN U.S.A.; 2; STERLING 544. The markings were stamped in black but are wearing off.
Sterling Plastics was operated by George and Mary Staab in Mountainside, N. J., through the late 1960s. It was a division of Borden Chemical Company in the 1970s and 1980s, during which time this object was called the 7-IN-1 Protractor. For other products of Sterling Plastics, see slide rule 1988.0807.01 and adding machine MA*335327. James J. Williams gave this protractor to the Smithsonian.
Reference: Toxic Substances Control Act: Trademarks and Product Names Reported in Conjunction with the Chemical Substance Initial Inventory (Washington, D.C.: United States Environmental Protection Agency, 1979), 90.
Location
Currently not on view
Object Name
protractor
date made
ca 1975
maker
Sterling Plastics
Physical Description
plastic (overall material)
Measurements
overall: .2 cm x 14.2 cm x 8.9 cm; 3/32 in x 5 19/32 in x 3 1/2 in
place made
United States: New Jersey, Mountainside
ID Number
1998.3104.01
nonaccession number
1998.3104
catalog number
1998.3104.01
subject
Protractors
Science & Mathematics
Mathematics
Protractor
See more items in
Medicine and Science: Mathematics
Protractors
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of James J. Williams

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