- 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.
- Currently not on view
- Object Name
- adding machine training device
- date made
- ca 1955
- Felt & Tarrant Manufacturing Company
- place made
- United States: Illinois, Chicago
- Physical Description
- metal (overall material)
- plastic (overall material)
- 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
- catalog number
- accession number
- Credit Line
- Gift of Myron R. Smith
- Data Source
- National Museum of American History
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