* Translation by Andries de Man

I) Arithmometer from 1860 (T1860)

Thomas re-uses the general principle of the tens-carry mechanism of the machines T1856 and T1858, but surely makes some improvements there!

The tens-carry is found stuck against the center plate of the cage. It starts to look like the ones we are used to see in "our common arithmometers". The lever is optimized and requires less space. Its task is still to move the tens-carry tooth so that it is placed under the tens-carry gear and engages it !

Detail of the T1860 tens-carry mechanism

Section view of the T1860