Safe-T 43032 4-in-1 Primary Rule

Safe-T 43032 4-in-1 Primary Rule

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Usage conditions apply
On one side, this 12" white plastic ruler has a scale of inches without any subdivisions along one edge and a scale of inches divided to 1/2" along the other edge. The ruler is marked: SAFE-T Products™, Inc. (/) Bensenville, IL 60106-0316. It is also marked: 4-in-1 PRIMARY SAFE-T RULER® 43032. It is also marked: SAFE-T PLASTIC®.
The other side has a scale of 30 centimeters along one edge, without any subdivisions, and a scale of inches divided to 1/4" along the other edge. This side is marked: 4-in-1 PRIMARY SAFE-T RULER® 43032. It is also marked: SAFE-T PLASTIC®.
Safe-T Products, Inc., was established in La Grange, Ill., in 1992 to make drawing instruments that were safe for children. Since model 43032 was flexible, it could also be used to measure arcs and circles. It sold for 89¢ in 2000. In 2006 Safe-T was absorbed into Classroom Products Warehouse of Vernon Hills, Ill.
References: Classroom Products Warehouse, "About Us,"; accession file.
Currently not on view
Object Name
scale rule
date made
Extra Measures, Inc.
Safe-T Products, Inc.
place made
United States: Illinois, Bensenville
associated place
United States: Illinois, Bensenville
Physical Description
plastic (overall material)
overall:.1 cm x 30.6 cm x 2.6 cm; 1/32 in x 12 1/16 in x 1 1/32 in
ID Number
accession number
catalog number
Credit Line
Gift of Extra Measures, Inc.
Rule, Measuring
See more items in
Medicine and Science: Mathematics
Metric System
Science & Mathematics
Measuring & Mapping
Scale Rules
Data Source
National Museum of American History
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