Abstract: In an irrigation rig made up of sections arranged end-to-end in a line, adjacent sections form angles therebetween, and in so doing form angles therebetween in the transverse movement of the rig. Safety switches are provided between adjacent sections, and when the angle becomes too large, the safety switches are actuated. The present device includes, in one form of the device, a signal transmitter controlled by a battery charged by the circuit driving the rig, and in a second form, a transformer energized by that circuit.