Abstract: This invention relates to an automatic sprinkler system for watering the lawn or vegetable gardens. The lawn-border sprinkler comprises a longitudinal member including a plurality of conduits, disposed in a parallel configuration wherein the top most conduit is divided into a plurality of separate compartments, each of which compartments includes a series of minute holes through the wall of the conduit. Each of the compartments in the top-most conduit is connected to separate supply conduit comprising an exclusive combination of said plurality of the conduits disposed parallel to the top-most compartment; whereby, a manifold valve controlling the water flow through each of the supply conduit supplying the water to each of the compartments with sprinkling holes controls the time-wise sprinkling pattern of each of the sprinkling compartments.

Abstract: An apparatus and method are disclosed for applying an active ingredient as an aerosol. A transducer (22) for creating an aerosol includes a propellant inlet (96) and a chamber defined by at least one chamber wall (128) confluent with the propellant inlet. A bluff body (112) is provided for creating at least one vortex (152) in the chamber when the propellant enters the propellant inlet in a supersonic flow condition. An orifice (118, 146) spaced apart from the bluff body and separated therefrom by the chamber wall is provided for creating an exiting vortex (154).