Definition

1. Noun:
   • A trademarked type of steel alloy: Elinvar is a specific kind of steel alloy, primarily composed of nickel and chromium, known for its unique physical property of maintaining a nearly constant elasticity (modulus of elasticity) across a wide range of temperatures.

Usage

• Elinvar is used as a proper noun (a trademark) to refer to this specific material. It is typically used in technical and industrial contexts, especially in precision engineering.
• Example: "The watchmaker selected for the balance spring to ensure the timepiece's accuracy remained stable despite temperature fluctuations."

Advanced Usage

• The property of Elinvar, where its elasticity does not change significantly with temperature, is sometimes referred to descriptively. However, "Elinvar" itself remains the trademarked name for the alloy possessing this property.
  • Example: "The invention of Elinvar revolutionized chronometer design by solving the problem of thermal error."

Variants and Related Words

• Elinvar alloy: A more descriptive term sometimes used.
• Invar: Another trademarked nickel-iron alloy known for its low thermal expansion, often mentioned in the same context as Elinvar for its complementary role in precision instruments.

Synonyms

• Constant-modulus alloy: A descriptive technical term for materials with the key property of Elinvar.
• Nickel-chromium steel alloy: A generic description of its composition.

Notes

• As a trademark, "Elinvar" is often capitalized. Its primary and almost exclusive application is in the manufacture of precision mechanical components, most notably the hairsprings (balance springs) in mechanical watches and chronometers, and other sensitive measuring instruments where dimensional stability is critical.

Noun

1. Elinvar is a trademark for a kind of steel used for watch springs because its elasticity is constant over a wide range of temperatures