Treadle

Definitions

1. A foot-operated pedal or lever that generates motion.
2. A device actuated by wheels passing over it.
3. Chalaza.

Equivalents

Examples

“There is an inconspicuous treadle let⟳ into the floor and when you step on it an air-operated door-opening mechanism is automatically activated; [...].”

“As a car enters the parking area the front wheels pass⟳ over a treadle, causing a timber barrier to lift⟳ and allow⟳ the motorist to drive⟳ in and park⟳. No money is required at this stage⟳. As the car passes over a second treadle, just beyond the entrance, the barrier falls again.”

CEFR level