Felt and Tarrant Comptometer, 1887.

Made:: c. 1900 in Chicago

inventor:: Dorr Eugene Felt

manufacturer:: Felt and Tarrant Manufacturing Company

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This image is released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence

Buy this image as a print

License this image for commercial use at Science and Society Picture Library

This image is released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence

Buy this image as a print

License this image for commercial use at Science and Society Picture Library

This image is released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence

Buy this image as a print

License this image for commercial use at Science and Society Picture Library

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Comptometer, early form (wooden box), 72 keys numbered, plate on top of box engraved " Trade Comptometer mark, Patd. July 19th 1887, Oct 11th 1887, Jan 8th 1889, June 11th 1889, Nov 25th 1890, Dec 15th 1891, Felt & Tarrant Manufacturing Co., Chicago"

An early example of the Comptometer, with 72 numbered keys. The top of box has a plate engraved with varoius patents up to 1891. The Felt and Tarrant Comptometer was one of the first generation of mass-produced office calculators. It was extremely successful being able to multiply and subtract quickly and efficiently.

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Science Museum: Mathematics: The Winton Gallery

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Details

Category:: Mathematics

Object Number:: 1911-255

Materials:: brass (copper, zinc alloy), mahogany (wood), resin (unidentified), steel (metal)

type:: calculating machines (full-keyboard)

credit:: Felt & Tarrant Manufacturing Company

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