link-motion

The engineer adjusts the link-motion on the steam locomotive.

Definition

1. Noun:
   • Mechanical device: "link-motion" refers to a mechanism used in steam engines, particularly locomotives, to control the opening and closing of valves. It consists of a system of links and rods that regulates the flow of steam into the cylinders, thereby controlling the engine's direction and speed.

Usage Examples

• Noun:
  • The engineer adjusted the link-motion to reverse the locomotive's direction. (The mechanism controlling the valves was changed to allow backward movement.)
  • Regular maintenance of the link-motion is crucial for the smooth operation of a steam engine. (The valve control system needs upkeep to function properly.)

Advanced Usage

• "Stephenson's link-motion": A specific type of valve gear invented by Robert Stephenson, widely used in steam locomotives.

  • The classic design of Stephenson's link-motion allowed for efficient steam distribution. (This particular mechanism improved the performance of early trains.)

• "Link-motion gear": The complete assembly of parts that form the link-motion system.

  • The link-motion gear required lubrication before each journey. (The entire valve control assembly needed oiling.)

Variants and Related Words

• Link (n): a single ring or loop of a chain, or a connecting piece in a mechanism.

  • The broken link in the chain was replaced. (A single ring that connects other parts.)

• Motion (n): the action or process of moving or being moved.

  • The motion of the piston drives the wheels. (The movement of the piston.)

Synonyms

• Valve gear: a mechanism that controls the timing of valves in an engine.
• Eccentric gear: a device that converts rotary motion into reciprocating motion (often part of link-motion).

Phrasal Verbs

Related Idioms