| 摘要 |
A five product fuel dispensing system having an electronic cost counter, a rotary drum connected to be driven in accordance with the volume of fuel delivered having a plurality of light apertures arranged in a plurality of axially spaced circles and three photoelectric pickups operable by the light apertures for generating three electrical pulse trains for operating the cost counter in accordance with a three place unit volume price. A bank of fifteen coaxial masking rings encircling the drum provide five sets of price wheels for establishing the unit volume prices of the five available products respectively and the five sets of price wheels are adapted to be selectively conditioned by an axially shiftable selector for selecting the established unit volume price in accordance with the fuel product selected. The price wheels also function as price posting wheels for displaying the established unit volume prices of the available fuel products and the axially shiftable selector provides for framing the displayed price of the selected set of price wheels.
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