Abstract: The present invention provides an automatic monitor for use in a tank with a water soluble softening agent. The monitor includes a signal emitter that produces a signal capable of being detected by an array of signal-detecting sensors. The sensors are displaced generally vertically in the brine tank from the minimum depth of the softening agent to the maximum depth of the softening agent. An output is produced in response to said signal. The monitor also includes an electronic device for receiving and interpreting the output and determining if a low softening agent condition is present as the supply of the softening agent is depleted. An indicator warns when a low softening agent condition is present. Preferably, the sensors are linearly spaced within the tank.

Abstract: The present invention provides an automatic monitor for use in a tank with a water soluble softening agent. The monitor includes a signal emitter that produces a signal capable of being detected by an array of signal-detecting sensors. The sensors are displaced generally vertically in the brine tank from the minimum depth of the softening agent to the maximum depth of the softening agent. An output is produced in response to said signal. The monitor also includes an electronic device for receiving and interpreting the output and determining if a low softening agent condition is present as the supply of the softening agent is depleted. An indicator warns when a low softening agent condition is present. Preferably, the sensors are linearly spaced within the tank.

Abstract: A reciprocating scotch yoke drive mechanism connectable to a motor drive shaft, includes a yoke member connectable to the shaft which moves the yoke member in a linear reciprocating motion and a guide having one or more slide tracks configured to define a reciprocal sliding path for the yoke member. The yoke member also has a sliding formation configured for slidingly engaging the slide track. And the sliding formation and the slide track have complementary configurations for maintaining alignment of the yoke member during reciprocal sliding motion and engagement of the yoke member in the slide track under a variety of angular stresses.