Device for indirectly monitoring cumulative cost of utility consumption

Claim 1

In conjunction with a utility consumption apparatus having an ON/OFF switch controlling the consumption of the utility, a device for indirectly monitoring and displaying the cumulative cost of the utility consumed by said apparatus without physically measuring the utility consumed by said apparatus, comprising: an electrical clock having a face, a minute hand, an electrical contact brush located on said minute hand, an electric motor for moving said minute hand, and electrical contact surfaces on said face for forming a calculation triggering switch with said electrical contact brush; an AC to DC transformer for connecting said electric motor and said ON/OFF switch for advancing said minute hand only when said utility consumption apparatus is operating to consume the utility to be monitored; constant addend calculation means having a memory for storing a cumulative total and a constant monetary increment, an addition circuit for adding said constant monetary increment to said cumulative total, an equals switch for activating said addition circuit, and display means; and a first electrical circuit including said electrical contact brush and said electrical contact surfaces for short circuiting said equals switch and activating said addition circuit to calculate the sum of said constant monetary increment and said cumulative total, to display said sum and to replace said cumulative total in said memory with said sum.