Ratchet
A saw-toothed wheel.
The ratchet wheel in a watch is a toothed wheel that is fixed by a square hole to the barrel arbor. A click (pawl) prevents the ratchet wheel from turning in the unwinding direction.
In a striking mechanism, the hour-ratchet or hour-rack is a toothed sector that lifts the hammer to strike the hours.
Terms with the same letter
Rack Rack Radiant cut Railroad Ratchet Rate Ream Recess Red diamond Refraction Refractive index Refractometer Regulating organ (regulator) Regulating parts Regulator Repair Repairer Repassage Repeater Repoussé Resonance Retour en vol Retrograde Revolutionary Revolutionary Revolutionary calendar Rhodium plating Rhodochrosite Rim Roch cristal Rock setting Roman numeral IIII on dials Roman numerals Rose cut Rotor Rough Ruby Rutilated quartz
