ratch

/'rætʃ/ Cách viết khác : (ratchet) /'rætʃit/

Thân thiện

A mechanic uses a ratch to tighten a bolt on an engine.

Definition

Noun: A ratch is a mechanical device that allows motion in only one direction. It typically consists of a toothed wheel (or a straight bar with teeth, called a rack) and a pivoting lever called a pawl. The pawl catches on the teeth to prevent backward movement.

Usage

The word "ratch" is a less common variant of the more widely used term ratchet. It functions as a noun to name the device itself. * The lifting mechanism used a simple ratch to prevent the load from slipping back down. * He inspected the ratch to ensure the pawl was engaging properly with the teeth.

Advanced Usage

• "Ratch" as a verb: While extremely rare and largely considered non-standard, "ratch" can be used informally as a verb meaning to move incrementally or to operate using a ratcheting mechanism. The standard verb is ratchet.
  • The tension was ratcheted (not ratched) up another notch.

Variants and Related Words

• Ratchet (n.): The standard and far more common term for the same device.
  • Turn the ratchet clockwise to tighten the strap.
• Pawl (n.): The pivoting bar or lever in a ratchet/ratch assembly that engages the teeth to prevent reversal of motion.
• Ratchet (v.): To cause something to change, especially to increase or decrease, in a series of irreversible steps.
  • The new policy will ratchet up production costs.

Synonyms

• Ratchet
• Click-stop mechanism (descriptive)
• One-way gear

Related Phrases

• Ratchet effect / Ratch effect: An economic or process term describing a situation that easily progresses in one direction (e.g., upward) but is difficult or impossible to reverse.
  • The ratchet effect meant prices never returned to their previous low levels.
• Ratchet wrench / Ratch wrench: A type of wrench with a built-in ratcheting mechanism that allows the user to turn a fastener without removing the tool from the fastener after each turn.

Học thuật

Noun

1. mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction

Từ đồng nghĩa

• ratchet
• rachet