Smithsonian museums continue to be 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.

Comptometer Educator

Comptometer Educator

Usage conditions apply
Downloads
Description
Careful study often indicated improved ways of using adding machines. For example, Comptometer operators were trained to use only the first five (lower) keys of a Comptometer. It was quicker to push a “4” key and a “5” key than to reach up and push a “9” key. This device assisted in training. It has a green plastic base with a 5x5 keyboard. The key stems and keyboard are metal, while the keys and base are plastic. The keys are alternately concave (odd digits) and flat (even digits). There is no mechanism. The device is marked: COMPTOMETER (/) EDUCATOR (/) A FELT AND TARRANT PRODUCT.
Aprivately owned undated brochure for the Comptometer Educator uses some of the same photographs as a 1954 training manual for Comptometer operators, hence the date assigned. For the 1954 training manual, see 1994.3060.008.
Location
Currently not on view
Object Name
adding machine training device
date made
ca 1955
maker
Felt & Tarrant Manufacturing Company
place made
United States: Illinois, Chicago
Physical Description
metal (overall material)
plastic (overall material)
Measurements
overall: 10.5 cm x 14 cm x 17.3 cm; 4 1/8 in x 5 1/2 in x 6 13/16 in
ID Number
1989.0325.05
catalog number
1989.0325.05
accession number
1989.0325
Credit Line
Gift of Myron R. Smith
subject
Mathematics
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Adding Machines
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