Rotary sprinkler

Claim 1

IN A SPRAY DISCHARGE DEVICE THAT INCLUDES A SPRAY NOZZLE TUBE DEFINING A FLOW PASSAGE AND TERMINATING IN NOZZLE FACE PORTIONS BORDERING AND DEFINING A DISCHARGE OPENING LEADING FROM SAID PASSAGE,AND MEANS FOR SUPPLYING LIQUID UNDER PRESSURE TO SAID TUBER TO FLOW THROUGH SAID PASSAGE AND OPENING AND DEFINE A LINE OF SPRAY DISCHARGE, SAID TUBE HAVING A LATERAL WALL OPENING, A PRESSURE CAPSULE SPANNING SAID LATERAL WALL OPENING AND MOUNTED IN RIGID SEALING RELATION THEREAROUND, SAID PRESSURE CAPSULE HAVING A FLEXIBLY DISTORTABLE PARTITIONING DIAPHRAGM PROVIDING SEPARATE CHAMBERS THEREIN, SAID CAPSULE HAVING A WALL OPENING ESTABLISHING OPEN COMMUNICATION BETWEEN SAID PASSAGE AND ONE OF SAID CHAMBERS, SAID CAPSULE HAVING A WALL OPENING DEFINING AN OUTLET FOR THE OTHER OF SAID CHAMBERS, AN ACTUATOR IN SAID OTHER CHAMBER AND HAVING AN ARM PROJECTING THROUGH SAID OUTLET FOR THE OTHER OF SAID CHAMBERS, AN DIAPHRAGM IN A DIRECTION TO EXPAND SAID ONE CHAMBER AND CONTRACT SAID OTHER CHAMBER TO MOVE SAID ARM BEYOND SAID OUTLET, AN ELONGATED SPRING LEAF ELEMENT HAVING A MOUNTING POINT ADJACENT ONE END THEREOF AND A LATERALLY DIRECTED GATE AT ITS OTHER END, MEANS FOR ATTACHING THE MOUNTING POINT OF SAID LEAF ELEMENT TO SAID CAPSULE TO DISPOSE AN INTERMEDIATE REGION OF LEAF ELEMENT IN A NORMAL POSITION EXTENDING ACROSS SAID OUTLET AND ALONG SIDE THE NOZZLE TUBE AND TO DISPOSE THE GATE IN SPANNING RELATION ACROSS SAID DISCHARGE OPENING TO SUBSTANTIALLY CLOSE THE SAME, SUCH THAT SAID ARM IN RESPONDING TO MOVEMENT OF THE DIAPHRAGM OCCASIONED BY PRESSURE IN SAID PASSAGE ENGAGES AND DEFLECTS SAID LEAF ELEMENT TO SWING THE GATE FROM SAID DISCHARGE OPENING.