Apparatus for measuring quantities of liquid in gasoline pumps of motor vehicle filling stations

Apparatus for measuring liquid supplied by gasoline pumps of motor vehicle filling stations during a fueling process, said apparatus comprising:

• (A) a rotor housing having an inlet, an outlet, and a bore extending axially through said housing from said inlet to said outlet;
• (B) a screw spindle arrangement including at least two rotary helical worm bodies which extend axially through said bore and which engage in a form fit manner with one another;
• (C) a pulse generator which is mounted on one of said worm bodies and which comprises a pulse disc mounted on an end of a shaft of said one worm body;
• (D) a measuring transducer mounted in said rotor housing adjacent said pulse generator and inductively coupled to said pulse generator, said pulse generator triggering electrical pulses in said measuring transducer which are dependent upon the rotational speed of said one worm body, said measuring transducer including a pulse correction circuit which varies one of the magnitude and the frequency of said pulses relative to a throughflow quantity of fuel dispensed by said apparatus, thereby forming adjusted electrical pulses;
• and
• (E) an electric counting mechanism which receives said adjusted electrical pulses from said pulse correction circuit and which includes an electronic counter and a display device.