Safe-T 43032 4-in-1 Primary Ruler

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.
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
place made
United States: Illinois, Bensenville
associated place
United States: Illinois, Bensenville
ID Number
accession number
catalog number
Measuring & Mapping
Scale Rules
Science & Mathematics
Rule, Measuring
Metric System
See more items in
Medicine and Science: Mathematics
Scale Rules
Metric System
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Extra Measures, Inc.
Additional Media

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