elinvar

The largest use of Elinvar was in balance springs for mechanical watches and chronometers.

Invar and Elinvar are able to resist magnetic fields, allowing the watch to continue to keep accurate time.

Along with the earlier alloy Elinvar, this alloy made obsolete the expensive compensation balance.

Guillaume is known for his discovery of nickel-steel alloys he named invar and elinvar.

Suspension springs of Elinvar were used to eliminate temperature variation of the spring's restoring force on the pendulum.

Around 1900, a fundamentally different solution was created by Charles Édouard Guillaume, inventor of elinvar.

The balance spring problem was solved with a nickel-steel alloy named Elinvar for its invariable elasticity at normal temperatures.

A solid Invar balance with a spring of Elinvar was largely unaffected by temperature, so it replaced the difficult-to-adjust bimetallic balance.

The bimetallic temperature compensated balance wheel was made obsolete by the discovery of low temperature coefficient alloys invar and elinvar.

Springs made of Elinvar, and other low temperature coefficient alloys such as Nivarox that followed, were not affected by temperature, so they made the temperature-compensated balance wheel obsolete.

The Nivarox alloy is a nickel iron alloy used mainly in the watch industry, but also in other micro-machine industries and in certain medical equipment and surgical instruments, in the same category as Elinvar, Ni-Span, Vibralloy and other similar.

Charles Edouard Guillaume won a Nobel prize for the 1896 invention of Invar, a nickel steel alloy with very low thermal expansion, and Elinvar (Elasticité invariable) an alloy whose elasticity is unchanged over a wide temperature range, for balance springs.