Our museum is temporarily closed to support the effort to contain the spread of COVID-19. Read a message from our director, and check our website and social media for updates.

Safe-T 41516 T-Square

Safe-T 41516 T-Square

Usage conditions apply
Downloads
Description
Along its top edge, this 9-1/2" transparent orange plastic rectangular instrument has a scale of inches divided to 1/16" for four inches and to 1/10" for four inches and numbered by ones from 1 to 8. The bottom edge has a centimeter scale divided to millimeters and numbered by ones from 0 to 20. Two rectangular indentations running the length of the instrument have holes drilled every 1/2-inch for drawing vertical lines. The holes are numbered from 3-1/2" to 0" to 3-1/2".
A lip underneath the instrument's left end serves as a guide rail when the T-square is placed on the edge of a clipboard or drawing board. Unlike a conventional T-square, this object has no crosspiece. This was supposed to make it easier to use. A hole at the right end permits hanging or placement in a three-ring binder. The device is marked: VIEW THRUTM; SAFE-T T-SQUARE®; SAFE-T PLASTIC®. It is also marked: Pat. (/) Pend. This patent was not identified.
Safe-T Products, Inc., of La Grange, Ill., was established in 1992 to sell drawing instruments that were safe for schoolchildren. In 1998 and 2000, Safe-T sold model 41516 for $1.95. In 2006, the company became a subsidiary of A. Daigger & Company and its name changed to Classroom Products Warehouse.
References: accession file; SAFE-T Products, Inc., Innovative Safe Drawing and Measuring Instruments, about 1998; Safe-T/Basics by Extra Measures, Inc., about 2000.
Location
Currently not on view
Object Name
t-square
date made
2000
maker
Safe-T Products, Inc.
place made
United States: Illinois, La Grange
Physical Description
plastic (overall material)
Measurements
overall: 24.1 cm x 5 cm x.3 cm; 9 1/2 in x 1 31/32 in x 1/8 in
ID Number
2000.0160.10
accession number
2000.0160
catalog number
2000.0160.10
Credit Line
Gift of Extra Measures, Inc.
subject
Mathematics
Education
Drawing Instruments
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Squares and Triangles
Data Source
National Museum of American History
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.

Comments

Add a comment about this object