1.disco calculador of petrol for automobiles, composed by three laminar discs of any rigid matter, united to each other by its center by means of an axis, which allows to turn independently of each other to the two upper discs, on the inferior one, that is said, characterized in that said lower disc, which is said, characterized in that said fixed lower disc, characterized in that said fixed lower disc disposes, integrally thereto, of a long tape or strip that is bent upwards, collapses on the two upper discs and is joins the central axis, whose tape or strip has two orifices or windows, coinciding with two respective spaces in the form of circular rings, in which there are represented columns of numbers that are arranged one on the upper disk, which is smaller in diameter that the other two, and the other column or circular ring of numbers on the second rotating upper disk, so that such numbers result visib through the aforementioned openings or windows, it being noted that the column and numbers of the smaller upper disk represent kilometers traveled or traveled, and that along with them there is a scale of radial lines or divisions, in which it points, according to its variable position, the arrow that the smaller disk is equipped with, to indicate the consumption of liters of gasoline per hundred kilometers, which is what said row of numbers represents, allowing with the combined rotation of the two discs to calculate the consumption or gasoline necessary for a certain route, or consumption per hundred kilometers of the vehicle. 2.disco calculator of gasoline for automobiles. (Machine-translation by Google Translate, not legally binding)
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