William Cordingley

In the beginning of the 20th century, the Englishman William George Cordingley, a merchant, and author of several books for commerce, stock exchange, and business tables and calculations from the end of the 19th and beginning of the 20th centuries, devised a simple adding machine, which he patented in 1907 (British patent №190715435 from 24 Oct. 1907 and later in 1909—pat. №190901751 from 27 May 1909.

The Computometer of Cordingley
The Computometer of William George Cordingley

The calculating device of Cordingley (see the nearby image) was a stylus-operated adder of Pascalene type, which was manufactured and sold under the name Computometer.

The Computometer was a brass (copper, zinc alloy), leather, and steel (metal) adding device with seven digital positions, as the leftmost (four or five) wheels are decimal, and others are divided according to the English monetary system units from the beginning of the 20th century. Besides the two above-mentioned English patents, Cordingley obtained two other patents for his device—in 1910 he got a French patent (№414055 for Perfectionnements aux machines à calculer), and in 1911 an Austrian patent (№49900 for Zehnerübertragung).