Leibniz’s stepped reckoner
device · 1694 · Early modern era
The first calculator that multiplied, using a stepped drum.
What it is made of
- Gear — has part. A stepped drum and gears.
Principles and materials it uses
- Brass — is made of. The movement is brass.
History: what it evolved from and what it influenced
- Mechanical calculator — evolved from. Leibniz developed Pascal’s idea by adding multiplication.
- Arithmometer — evolved into. Thomas’s arithmometer used Leibniz’s stepped drum.