Abstract: A windshield wiper controller 10 is provided for automatically regulating the operating speed of a motor powering a windshield wiper. An automatically set or manually set wiper speed selector 36, 48 is provided for selecting a wiper speed setting to initially control the operating speed of the windshield wiper motor. A sensor 22 senses the actual speed of the windshield wiper movement relative to the windshield. Controller 32 is responsive to the sensor 22 and automatically generates a wiper speed increase signal to the selector when the sensed wiper speed is less than a selected value, and similarly generates a wiper speed reduce signal when the sensed wiper speed is greater than a selected value. The wiper speed sensor 22 may include a magnet 20 which acts as a triggering mechanism outputting a signal from the wiper sensor. A timer 44 measures the time interval between at least a substantial portion of the forward wiping motion and the return wiping motion.

Abstract: A pump-off controll device for controlling a pumpjack unit. The device measures the length of time required for the pump to downstroke successive numbers of times, and when the time differential reaches a predetermined value, the well is shut-in for a time interval.