The mechanism can determine the product x×y. A quantity proportional to y is marked off on slide 4 which travels horizontally in roller guides. Slide 4 carries pin b which slides along channel 7. When slide 4 is displaced, channel 7 turns about point B of roller a, and slide 8 is displaced a distance proportional to quantity y. Quantity x is set up by means of pinion 10 and gear rack 9 so that slide 8 is displaced a distance proportional to quantity x. Thus, the resultant displacement of slide 8 is proportional to the product x×y and is transmitted by means of roller c to the actuating mechanism.
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