Automatic meter reading device
US4004097A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 3, 1975 |
| Grant date | Jan 18, 1977 |
| Priority date | — |
| Expiry date | Jan 3, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/002
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A device for automatically reading one or more meters at a remote location and supplying the information read over telephone lines to a central station includes a coupler effective on command from the central station to furnish power to the meter reading device from the telephone lines and to energize the device to duplicate the readings of the meter counters in sequence to respective registers, from which the readings are encoded in an encoder effective to transmit the information through the coupler and over the telephone lines to a central station by frequency-shift modulation, and to repeat the message until signalled by the central station to stop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.