Abstract: A pricing mechanism for a mechanical computer, used in connection with a fuel dispensing pump, is of expanded capacity, enabling a price of $0.000 to $4.999 to be set and posted. The mechanism for expanding the variator comprises a supplemental range assembly, which cooperates with a secondary cone gear and a secondary summing mechanism disposed on the shaft of one of the range arm assemblies; the selector gear of the supplemental assembly can be selectively positioned to post a dollar value through four dollars. Means for reducing the speed of the output gears of the range arm assemblies, and for minimizing the size of the secondary integrator, are also provided.

Abstract: Conversion of a conventional volume-price computer for a liquid fuel metering pump to extend the existing range from three place to four place unit price per volume and comprising an auxiliary differential gear train assembly driven from the main output gear of the volume register shaft through a settable variable gear train and a fixed step-up gear train assembly wherein an additional higher unit price per volume of 0, $1, or $2 may be added to the conventional mechanism.

Abstract: A mechanical integrator, such as may be used in a fuel pump variator, is of reduced size, adapting it for use in applications in which the space available is limited. It employs three planetary gears having odd numbers of teeth, and may utilize the mounting shaft as one input signal source. The planetary gears are mounted in a relationship of isosceles triangularity, typically with complementary angles of 108.degree. and 144.degree. therebetween.

Abstract: A conversion mechanism for selective conversion of a conventional mechanical fuel pump computer to selectively extend the unit volume price range of the computer while maintaining the rotational speed of the right hand cost and volume counter wheels of the computer within acceptable limits and mathematical correspondence of the volume counter readout with the cost counter readout and the established unit volume price. The conversion mechanism comprises cost and volume drive ratio selector mechanisms and one or more sets of single transfer, double transfer and quadruple transfer right hand cost counter wheels and a decimal point selector mechanism for shifting the decimal point of the unit volume price setting and/or cost counter readout.

Abstract: A conversion mechanism for selective conversion of a conventional mechanical fuel pump computer to selectively extend the unit volume price range of the computer while maintaining the rotational speed of the right hand cost counter wheels of the computer within acceptable limits. The conversion mechanism comprises a cost drive ratio selector mechanism and one or more sets of substitute single transfer and double transfer right hand cost counter wheels and provides for selectively and successively shifting the decimal point of the unit volume price range and cost counter readout and for establishing a cost counter drive ratio for each of the substitute right hand cost counter wheels.

Abstract: Conversion of an extended range mechanical fuel pump computer price variator for selectively substituting an optional $3, $4 or $5 unit volume price adder for an optional $1 or $2 unit volume price adder.

Abstract: A bevel gear system wherein a plastic adaptor of generally frustoconical shape has convergent teeth formed in a recessed frustoconical surface to snap fit over the bevel gear teeth of a more rigid drive gear and similarly has matching gear teeth on an exterior frustoconical surface in mesh with the teeth of a driven bevel gear, which formerly was driven by the teeth of the more rigid gear, and whose axial position has been changed to mesh with the teeth of the adaptor.

Abstract: Means for converting a fuel pump computer from a maximum unit volume price of 99 and 9/10 cents established by a conventional mechanical variator of the computer to a higher maximum unit volume price of either $1.49 and 9/10 cents or $1.99 and 9/10 cents and employing a selective adder mechanism installed in a mechanical register of the computer for manually selectively adding either $0.50 or $1.00 to a base unit volume price established by the variator.

Abstract: Converter for a fuel pump computer having a register driven by a variator normally connected to be driven by a meter wherein the converter is attachable to the variator for driving it by a variator drive gear in the converter which has a meter driven rotary input and change speed gearing for expanding the price range of the computer. In a first setting, the rotary input is connected to the variator drive gear in 1:1 drive ratio. In a second setting, the rotary input is connected to the variator drive gear via the change speed gearing to provide a selected drive ratio for a different unit volume of fuel delivered. The settings of the converter are changed by an interlock providing an irreversible gear ratio changeover.

Abstract: A modified mechanical gasoline pump computer with an input gear box mounted on the underside of the base of the computer variator. A depending gear box input shaft is coupled to be driven by the gasoline meter and is axially shiftable for axially shifting gear box output gearing mounted on the variator center shaft upwardly from a gallon unit volume measure gear ratio setting to an alternate quart or liter unit volume measure gear ratio setting.