Remote meter reading system
US4316262A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 1979 |
| Grant date | Feb 16, 1982 |
| Priority date | — |
| Expiry date | May 30, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q9/14
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A remote meter reading system in which clock pulses are transmitted to a selected remote terminal to charge a capacitor there which acts as the terminal power supply. Subsequent clock pulses reset a ten-stage bit counter and four-stage digit counter, after which additional clock pulses step the bit counter, the outputs of which are AND-gated with the outputs of the digit counter, in such a manner that the current drawn from the central data collection terminal is increased whenever there is coincidence between the bit counter and digit counter outputs. A counter at the central data terminal is stepped by the clock pulses and disabled by the relatively large pulses developed when the bit and digit counter outputs coincide. Therefore, the output of the central data terminal counter corresponds to the desired meter reading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.