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A sprinkler includes a stream nozzle with a plurality of circumferentially spaced, radially extending stream forming ports. A non-rotating arc adjustment sleeve is mounted for axial movement relative to the stream nozzle to selectively block the stream forming ports to vary an arc of coverage of a p

A sprinkler includes a stream nozzle with a plurality of circumferentially spaced, radially extending stream forming ports. A non-rotating arc adjustment sleeve is mounted for axial movement relative to the stream nozzle to selectively block the stream forming ports to vary an arc of coverage of a plurality of streams of water ejected from the stream forming ports.

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1. A sprinkler, comprising: a stream nozzle with a plurality of circumferentially spaced, radially extending stream forming ports;a non-rotating arc adjustment sleeve mounted for axial movement relative to the stream nozzle to selectively block the stream forming ports to vary an arc of coverage of

1. A sprinkler, comprising: a stream nozzle with a plurality of circumferentially spaced, radially extending stream forming ports;a non-rotating arc adjustment sleeve mounted for axial movement relative to the stream nozzle to selectively block the stream forming ports to vary an arc of coverage of a plurality of streams of water ejected from the stream forming ports;a reduction gear train with an output coupled to rotate the stream nozzle relative to the arc adjustment sleeve; anda turbine coupled to an input of the reduction gear train. 2. The sprinkler of claim 1 wherein the stream nozzle and the arc adjustment sleeve are both cylindrical and the arc adjustment sleeve is mounted within the stream nozzle. 3. The sprinkler of claim 1 and further comprising a flush plug that can be temporarily mounted inside the arc adjustment sleeve. 4. The sprinkler of claim 1 and further comprising a flow stop mounted for manual movement to increasingly restrict an amount of water that can flow through the stream forming ports to adjust a radius of the streams of water ejected from the stream forming ports. 5. The sprinkler of claim 1 and further comprising a riser that encloses the reduction gear train and the turbine. 6. The sprinkler of claim 5 and further comprising a nozzle head rotatably mounted at an upper end of the riser and housing the stream nozzle and the arc adjustment sleeve. 7. The sprinkler of claim 6 and further comprising a stationary hub connected to the arc adjustment sleeve and fastened to an upper end of the riser below the nozzle head. 8. The sprinkler of claim 7 and further comprising an adjusting ring mounted on the stationary hub and manually rotatable to adjust the arc of coverage. 9. The sprinkler of claim 7 and further comprising a threaded pattern base cup that can be rotated by the adjusting ring to axially move the arc adjustment sleeve. 10. The sprinkler of claim 1 and further comprising a nozzle cap mounted above the rotating stream nozzle and including a plurality of downwardly extending stream diffuser pins positioned to intercept corresponding ones of the streams of water. 11. The sprinkler of claim 1 wherein the arc adjustment sleeve has a step pattern including a plurality of upper edge surfaces that terminate at different elevations. 12. The sprinkler of claim 1 wherein the arc adjustment sleeve has a sloped pattern including an inclined upper edge surface. 13. A pop-up adjustable arc and adjustable radius barrel head rotary stream sprinkler, comprising: a cylindrical outer body;a riser telescopically received within the outer body;a coil spring surrounding the riser and biasing the riser to a lower retracted position within the outer body;a nozzle head rotatably mounted at an upper end of the riser;a cylindrical stream nozzle mounted in the nozzle head, the stream nozzle having a plurality of circumferentially spaced, radially extending stream forming ports;a non-rotating cylindrical arc adjustment sleeve mounted for axial movement within the stream nozzle so that an upper edge of the arc adjustment sleeve with different elevations can selectively block the stream forming ports to vary an arc of coverage of a plurality of streams of water ejected from the stream forming ports;a reduction gear train mounted in the riser with an output coupled to rotate the stream nozzle relative to the arc adjustment sleeve; anda turbine mounted in the riser and coupled to an input of the reduction gear train. 14. The sprinkler of claim 13 and further comprising a flow stop mounted in the nozzle head for manual movement from a top side of the nozzle head to increasingly restrict an amount of water that can flow through the stream forming ports to adjust a radius of the streams of water ejected from the stream forming ports. 15. The sprinkler of claim 13 and further comprising a stationary hub connected to the arc adjustment sleeve and fastened to an upper end of the riser below the nozzle head. 16. The sprinkler of claim 15 and further comprising an adjusting ring mounted on the stationary hub and manually rotatable to adjust the arc of coverage. 17. The sprinkler of claim 16 and further comprising a threaded pattern base cup that can axially move the arc adjustment sleeve by rotating by the adjusting ring. 18. A sprinkler, comprising: a cylindrical stream nozzle with a plurality of circumferentially spaced, radially extending stream forming ports;a non-rotating cylindrical arc adjustment sleeve mounted for axial movement within, and relative to, the stream nozzle to selectively block the stream forming ports to vary an arc of coverage of a plurality of streams of water ejected from the stream forming ports;a flow stop mounted for manual movement to increasingly restrict an amount of water that can flow through the stream forming ports to adjust a radius of the streams of water ejected from the stream forming ports;a reduction gear train with an output coupled to rotate the stream nozzle relative to the arc adjustment sleeve;a turbine coupled to an input of the reduction gear train;a riser that encloses the reduction gear train and the turbine;a nozzle head rotatably mounted at an upper end of the riser and housing the stream nozzle and the arc adjustment sleeve;a stationary hub connected to the arc adjustment sleeve and fastened to an upper end of the riser below the nozzle head; andan adjusting ring mounted on the stationary hub and manually rotatable to adjust the arc of coverage. 19. The sprinkler of claim 18 and further comprising a threaded pattern base cup that can axially move the arc adjustment sleeve by rotating by the adjusting ring. 20. The sprinkler of claim 18 and further comprising a nozzle cap mounted above the rotating stream nozzle and including a plurality of downwardly extending stream diffuser pins positioned to intercept corresponding ones of the streams of water. 21. A sprinkler, comprising: a ring-shaped nozzle with a plurality of radially extending stream forming ports, the nozzle having a central bore in which is located a normally stationary cylindrical arc adjustment sleeve having a circular upper edge with different elevations around a circumference of the upper edge, a nozzle head enclosing the nozzle and the arc adjustment sleeve, an adjusting member mounted in the nozzle head, and a threaded coupling that permits manual rotation of the adjusting member to move the arc adjustment sleeve axially so that the different elevations of the upper edge of the arc adjustment sleeve can selectively block the stream forming ports to vary an arc of coverage of a plurality of streams of water as they are simultaneously ejected from the stream forming ports.