Hardware

Wild computing devices from the late 1800s and early 1900s

Recording Computing-Machine - Full

U.S. Patent number: 465,255
Filed: Nov. 11, 1890
Issued: Dec 15, 1891
Inventor: Dorr E. Felt

In 1891, Dorr Felt invented a device designed to improve upon the existing "recording machines which compute." Felt described the improvements in his device as follows:

"The leading object of my invention is to provide an improved recording-machine which will record the answer or result indicated by the numeral-wheels by pressing a knob instead of striking the amount of the answer on the keys."

Image taken from U.S. Patent 465,255 - Digitized by Google

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Bill Detwiler is Managing Editor of TechRepublic and Tech Pro Research and the host of Cracking Open, CNET and TechRepublic's popular online show. Prior to joining TechRepublic in 2000, Bill was an IT manager, database administrator, and desktop supp...