Abstract: A sprinkler head having a reversing mechanism cooperable with spaced cam assemblies for effecting part circle mode operation in which the cam element of one of the cam assemblies is selectively movable by a spring pressed over center toggle linkage between two positions, one of which causes the sprinkler head to operate in a part circle mode and other of which causes the sprinkler head to operate in a full circle mode.

Abstract: A sprinkler head comprising a stationary sprinkler body structure defining an inlet adapted to be connected with a source of water under pressure and a water-tight chamber communicating with the inlet, a movable tubular water distributing structure providing an inlet and a spaced discharge nozzle in flow communication relation therewith, a ball and socket connection for (1) mounting the water distributing structure on the sprinkler body structure with the inlet thereof within the chamber and the discharge nozzle exteriorly of the chamber for (a) rotational movement about a generally upright axis and (b) orbital movement in which the rotational axis of the water distributing structure describes a pair of cones whose apexes join at a point coinciding with the center of the ball and socket connection, and (2) providing a water-tight seal for the chamber between the sprinkler body structure and the water distributing structure in any position of movement thereof, a swirl plate within said chamber and an inverted