Watt-hour meter
US4782287A · kind A · utility
11Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1986 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Oct 30, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R21/1273
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a watt-hour meter pulse width modulated signals, representing the voltage supplied to a load, serve as chopping signals that modulates a waveform representing current to produce an output indicative of power. A series of pulses is spaced on the basis of the power signal and the number of pulses connected as a measure of energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.