Adix adding machine

The first patent of the Adix adder is the German patent No DE173286 from 11.12.1904 (see the lower drawing), granted to the famous austrian watchmaker Joseph Pallweber of Salzburg, known mainly as the inventor of the so called jump hour watch (first digital watch). Pallweber was a holder of many patents for clock devices and 3 calculating machines. The device was manufactured from 1904 till 1930 by the Adix Company (owners Pallweber and Bordt).

Adix patent drawing (patent No DE173286 from 1904)

The Adix is a click wheel column adder with nine keys, dimensions 15 x 10 x 3 cm and weight 0.5 kg. 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