Ohmmeter for circuits carrying unknown currents
US4047104A · kind A · utility
2Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 28, 1976 |
| Grant date | Sep 6, 1977 |
| Priority date | — |
| Expiry date | Jul 28, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A direct reading ohmmeter for neutralizing the effects of foreign voltages is disclosed including alternately connected stages for registering the Thevenin Equivalent open circuit voltage across test probes as well as a voltage whose value is a function of the resistance to be measured, and circuitry monitoring these stages for determining the value of the unknown resistance by a continuous subtraction of the stored voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.