history-computer.com
Alexander Rechnitzer’s parents lived in Körmend before moving to Preßburg in the 1870s, where his elder sister was born in 1878. They later relocated to Vienna in the early 1880s after the birth of Alexander.
Rechnitzer invented the Autarit, also referred to as Autarith, a fully automatic calculating machine that could perform multiplication and division operations as well as subtraction and addition.
The machine had to be set to adding mode with a button push for addition operations. The addends had to be keyed in using the two slots of the sliders.
Rechnitzer started working on this salable model in 1912. The machine relied on a belt drive mechanism to perform automatic shortcut multiplications and full automatic division calculations.