Self-aligned light load adjustment assembly for induction meters
US4423375A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1981 |
| Grant date | Dec 27, 1983 |
| Priority date | — |
| Expiry date | Jun 10, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R11/23
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention is for an induction meter having a voltage and a current magnetic section. The voltage magnetic section is comprised of a substantially E-shaped laminated magnetic core having a center leg terminating at a main pole face and two adjacent legs terminating at coplanar auxiliary pole faces on opposite sides of the main pole face, and includes a spacer bracket located between a first side of the voltage magnetic core and a first voltage shunting member. The spacer bracket carries a self-aligned, light load adjustment assembly having a movable tab extending over portions of one of the auxiliary pole faces and the main pole face thereby providing an adjustable magnetic flux shunt path. A second voltage shunting member is located in magnetic proximity to the first side of the core and spaced from the first voltage shunting member by a nonmagnetic spacer. The second voltage shunting member has a fixed tab in magnetic proximity to the other auxiliary pole face and a fixed tab in magnetic proximity to the movable tab. In this manner, the first voltage shunting member, the second voltage shunting member and the movable tab all provide magnetic flux shunt paths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.