Comptometer Model J

Description
This key-driven adding machine had ten columns of color-coded green and white plastic keys. Complementary digits were indicated on the keys, and they were alternately concave (for odd digits) and flat (for even digits). Another key stem is at the back to the right of the number keys. In front of the keys is a row of ten subtraction levers. In front of these is a row of ten numbered decimal markers. In front of these are windows in the metal case that reveal 11 number dials, that indicate the result of addition.
The machine is marked on the front top at the left: J329139. It is marked on the front: Comptometer. It is marked on a sticker on the left side: DEPARTMENT OF AGRICULTURE (/) 89699-BAE.
This instrument came to the Smithsonian from the U.S. Department of Agriculture.
Reference:
Felt & Tarrant, Accession Journal 1991.3107.06
Location
Currently not on view
Object Name
adding machine
date made
1935
maker
Felt & Tarrant Manufacturing Company
Physical Description
wood (overall material)
metal (overall material)
plastic (overall material)
Measurements
overall: 14 cm x 27.5 cm x 37.5 cm; 5 1/2 in x 10 13/16 in x 14 3/4 in
place made
United States: Illinois, Chicago
ID Number
MA*328128
maker number
J329139
catalog number
328128
accession number
270163
subject
Mathematics
Science & Mathematics
Adding Machines
See more items in
Medicine and Science: Mathematics
Adding Machines
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Transfer from US Department of Agriculture

Visitor Comments

Add a comment about this object

**Please read before submitting the form**

Have a comment or question about this object to share with the community? Please use the form below. Selected comments will appear on this page and may receive a museum response (but we can't promise). Please note that we generally cannot answer questions about the history, rarity, or value of your personal artifacts.

Have a question about anything else, or would you prefer a personal response? Please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Image CAPTCHA
Enter the characters shown in the image.