Patent · US Expired

Level gauge for oil-filled transformer, choke, or tap changer

US7191648B2 · kind B2 · utility

1Cited by

7References

3Claims

0Family size

Assignee

MASCHINENFABRIK REINHAUSEN GMBH · DE

Inventors

Reiner Brill · Nidda, DE
Kai Hämel · Bad Orb, DE
Karsten Viereck · Teisendorf, DE

Key dates

Filing date	Oct 14, 2005
Grant date	Mar 20, 2007
Priority date	—
Expiry date	Oct 14, 2025

Classification

Technology area (CPC G)Physics
CPC primaryG01D2205/777
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An electric power apparatus has a oil-filled vessel in which a float is connected to a float shaft that rotates as the float rises and falls with the level of oil. A level indicator has a display shaft extending along and pivotal about an axis, and coupled to the float shaft. An indicia display adjacent the shaft is swept by a pointer fixed on the shaft and juxtaposed with the indicia display go that the level of the oil in the vessel is indicated by the pointer. A disk fixed to the shaft has an outer periphery with a region of a shape having a radius varying angularly from one end of the region to an opposite end of the region. A noncontact proximity sensor is radially spacedly juxtaposed with the region of the disk for producing an output corresponding to the radial distance between the region and the sensor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.