Abstract: A stepper for use between a transducer subjected to variable pressure, heat or liquid level for converting the continuous output signal of the transducer with all of its variations, both of significant magnitude and those of insignificant importance, into a continuous stepped output signal that increases or decreases the current to a transducer responsive control unit, particularly a servo amplifier, which stepped signal eliminates all minor and unimportant fluctuations from the output current from the transducer. The stepper also includes a sequence of voltage regulators such as potentiometers in the circuits between the stepper and the servo amplifier by means of which the magnitude of the current flow of each step to the servo amplifier may be adjusted or programmed with respect to one another. It is particularly useful in the regulation of flow control valves in water distribution and sewage disposal systems, but its application to steam boilers is also disclosed and described.

Abstract: In order to more effectively control the operation of surge valves in pumping stations through relatively long pipelines where liquid is pumped to an elevated discharge circuit and avoid excessive waste of water, where there is provided an electric solenoid to effect opening and subsequent closing of the surge valve and an electric circuit that responds to abnormal conditions which will result in a pressure surge of water with the unscheduled pump stoppage due to mechanical or electrical failure. This circuit operates to open the solenoid valve in time for the surge valve to open before the actual pressure surge of water arrives and closes after the surge has spent at least most of its force, so that liquid will be spilled for only a safe period of time. At the same time, the circuit will effect the successive display of pilot lights to indicate its condition at any time.

Abstract: For use in connection with an electrically driven pump and check valve combination as used in municipal water and sewage plants wherein the check valve prevents the reverse flow of water from the pipeline to which the pump supplies water into the pump, as would otherwise happen in case of a pump failure or breakdown or temporary power failure, there is provided a pump director with a first timer that starts the pump operating as soon as a control switch is closed and power is available and, as soon as the pump motor is energized, a blue signal light flashes, but if pressure does not begin to build up in the pump outlet with the check valve closed, a flashing red signal will replace the blue and continue indefinitely until manually reset.

Abstract: In order to more effectively control the operation of surge valves in pumping stations through relatively long pipelines where liquid is pumped to an elevated discharge circuit and avoid excessive waste of water, where there is provided an electric solenoid to effect opening and subsequent closing of the surge valve and an electric circuit that responds to abnormal conditions which will result in a pressure surge of water with the unscheduled pump stoppage due to mechanical or electrical failure. This circuit operates to open the solenoid valve in time for the surge valve to open before the actual pressure surge of water arrives and closes after the surge has spent at least most of its force, so that liquid will be spilled for only a safe period of time. At the same time, the circuit will effect the successive display of pilot lights to indicate its condition at any time.