A PRODUCT-ACCESSING SYSTEM

摘要

A programmable-meter system for controlling the accessing to and dispensing of elctricity or other public utility service or other dispensable product. A master card programmes the meter to deduct from the face value of a value card a sum encoded onto the master card whilst the value card accesses the product to the consumer <> him product to the value of the difference between the face value of the value card and the sum encoded on the master card.