Abstract: Apparatus for conveying sewage or waste water by means of a rotatable displacement pump positioned within a housing. A cutting device is positioned at a water inlet for cutting solid materials that are part of the waste water to reduce their size in order for the materials to be able to pass through the pump. The pump is an eccentric worm-gear pump and is driven by a motor drive shaft that also drives the rotatable portion of the cutting device. The apparatus has a compact design and provides a high suction capacity, and a conveying capability that is independent of the supply resistance, so that a small diameter pump outlet pipe can be provided for the sewage.

Abstract: Analogue measuring value signals, generated in a throughflow measuring device, are infed to a computer by means of an analogue-digital converter. The computer adds the received digital signals and produces at regular time intervals, for instance every three seconds, an output signal corresponding to the total conveyed quantity. This output signal serves to control a display device and a printer. In the display device there is displayed the total quantity of the conveyed material during a certain time span. On the other hand, the computer forms a mean or average value signal from digital signals received within a predetermined time span, for instance likewise every three seconds. This mean value signal is characteristic for the momentary throughflow of the material during this time period. This mean or average value signal likewise serves to control the display device and the printer. In the display device there is thus also displayed the momentary throughflow quantity.