Adix adding machine
The first patent of the Adix adder is the German patent №DE173286 from 11.12.1904 (see the lower drawing), granted to the famous Austrian engineer, equipment manufacturer and inventor Joseph Pallweber from Salzburg, known mainly as the inventor of the so called jump hour watch (first digital watch). Pallweber was a holder of many patents in several countries for clock devices and 3 calculating machines.
The device was in production from 1904 till 1930 by the Adix Company, Manheim, Germany (owners Joseph Pallweber and Adolf Bordt). Improved versions of the device were manufactured also under other names, e.g. Diera (since 1906) and Kuli (since 1909).
Adix patent drawing (patent №DE173286 from 1904)
The Adix is a click wheel column adder with nine keys, overall dimensions 15 x 10 x 3 cm and weight 0.5 kg. It was sold in a grained leather brown wooden box.
The whole mechanism lies exposed so that the operator may clearly see the manner in which the key depression is transmitted to the counting mechanism. Addition occurs by key depression, but the machine does not permit addition of whole amounts, it merely permits additions of columns of individual digits to the extent to which they do not exceed a total sum of 999. If calculation in one column has been completed, the operator makes a note of the last digit and registers the carryover by means of the keys.
The Adix adding machine (courtesy of Mr. Arthur Rosen)
The company's name is written in Gothic script and bears the word Mannheim. The calculator consists of 122 parts and for the first time in a computing machine uses parts made of aluminum.