Charles-Édouard Guillaume
1861 – 1938
Discovered Invar's near-zero thermal expansion; Nobel 1920.
A Swiss physicist at the international metrology bureau, Guillaume discovered Invar — the nickel-steel alloy that barely expands with temperature — in 1896, winning the 1920 Nobel Prize for the precision it enabled in instruments and clocks.
The thermal-expansion tool here lists Invar because of him: the material that let engineers build things that hold their dimensions.
Portrait: a stylized blueprint-line rendering, not a photograph.
Contributions in the toolbox
- 1896
Invar discovered — near-zero expansion alloy.
→ Linear Thermal Expansion - 1920
Nobel Prize for Invar and precision metrology.
→ Linear Thermal Expansion