Sprinklers

A sprinkler comprising:

• a nozzle connectable to a pressurized-liquid supply pipe and formed with an axial bore having an inlet end for inletting the liquid from the supply pipe and an outlet end through which the liquid exits in the form of a jet;
• a spindle extending through the bore and projecting outwardly of the outlet end thereof, said spindle including means for retaining same within the bore but having a smaller outer diameter than the diameter of said bore so as to be laterally movable within said bore;
• and a deflector mounted on said spindle and having a recess facing, and slightly larger than, the outlet end of said nozzle bore so as to be impinged by the jet issuing from the nozzle and thereby to impart rapid lateral movements to the spindle causing the spindle to impact against the sides of the bore;
• characterized in that said deflector is eccentrically mounted on said spindle, and said recess is formed eccentrically of said deflector, such that the impacts of the spindle against the sides of the bore impart a rotary movement to the deflector during impingement of the jet on the deflector.