Stability of the in-phase travelling wave solutions in a pair of coupled nerve fibers

An oscillating sprinkler drive for pivotally moving the spray tube of an oscillating sprinkler in partial overlapping oscillational movements to facilitate even distribution of water over a rectangular area. The drive primarily comprises a drive cam and a follower arm which are operatively connected to the spray tube through conventional linkage. The cam is designed to reverse movement of the spray tube at preselected angular positions between angular limits set by the conventional linkage. By strategically locating these reversing points, more water may be directed toward the center of the spray pattern to compensate for the dwell of the spray tube at the angular limits.