| 摘要 |
The gas and electricity meters in homes and premises are often positioned so that it is very difficult to read them; even after reading them most people find it difficult to convert the readings into cash cost. This invention makes it possible to display running, projected and the final end-of-period cost in a position in the house or premises which is prominent and selected by the consumer. The use of the device would enable consumers to plan the use of energy carefully and enable consumption to be managed within budgets which can be afforded. The invention would operate in conjunction with the gas and electricity meters but would have no physical connection with them other than by the impingement of a beam of light on the rotating hands or discs in the meters. The displays would show cash costs and also initiate warnings when a preset target consumption is exceeded. <IMAGE>
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