Fuel pump computer conversion means

Fuel pump computer conversion means for selectively converting the unit volume price and volume registration of a mechanical fuel pump computer from a first to a second unit volume measure having a volumetric ratio of a:1;

• the mechanical fuel pump computer having a variator with a base and a center shaft with a portion depending below the base adapted to be rotated by a fuel meter in accordance with the volume of fuel delivered, the variator being settable for establishing each place of a unit volume fuel price within a multiple place price range and for registering the unit volume price established by the variator setting, and a resettable register having at least one volume counter connected to be driven by the variator center shaft to register the volume of fuel delivered and at least one cost counter connected to be driven by the variator to register the cost of fuel delivered in accordance with the registered volume and the unit volume price established by the variator setting;
• the fuel pump computer conversion means comprising an auxiliary housing mounted on the underside of the base of the variator with said depending center shaft portion enclosed therein, a rotary output with center shaft drive means mounted on said depending center shaft portion and within the housing, a rotary input rotatably mounted on the housing to extend therethrough and having input drive means inside the housing and an outside extension adapted to be rotated by a fuel meter in accordance with the volume of fuel delivered, and intermediate rotary drive means mounted within the housing for operatively connecting the rotary input drive means and the rotary output drive means;
• the input, output and intermediate drive means collectively providing settable drive means manually selectively shiftable from externally of the housing from a first setting establishing a first drive ratio between the rotary input and rotary output, to a second setting establishing a second drive ratio between the rotary input and rotary output, the second and first drive ratios having a relative drive ratio of a:1 for registering with the fuel pump computer in said first setting of the settable drive means the unit volume price and the volume of fuel delivered in said first unit volume measure and the cost of fuel delivered in accordance with the volume and unit volume price in said first unit volume measure, and for registering with the fuel pump computer in said second setting of the settable drive means the unit volume price and the volume of fuel delivered in said second unit volume measure and the cost of fuel delivered in accordance with the volume and unit volume price in said second unit volume measure, the rotary output drive means being axially shiftable on the variator center shaft from a first to a second operating position thereof to shift the shiftable drive means from its said first setting to its said second setting, means for retaining the rotary output drive means in its second operating position, the rotary input being mounted on the housing substantially coaxailly with the rotary output and to be axially shiftable from a first extended normal position to a second withdrawn position and back to its first extended normal position, the rotary input and the rotary output drive means having cooperating means for axially shifting the rotary output drive means from its said first operating position to its said second operating position by axially shifting the rotary input from its said first extended normal position to its said second withdrawn position.