Patent · US Expired

Homogeneous field magnet with at least one pole plate to be mechanically aligned

US5729188A · kind A · utility

7Cited by

6References

27Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Horst Siebold · Erlangen, DE
Gunter Ries · Erlangen, DE
Rudolf Röckelein · Erlangen, DE

Key dates

Filing date	Nov 26, 1991
Grant date	Mar 17, 1998
Priority date	—
Expiry date	Nov 26, 2011

Classification

Technology area (CPC G)Physics
CPC primaryG01R33/383
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A magnet contains a magnetic yoke and two pole shoes, between which a magnetic field of great homogeneity is formed. The pole shoes are provided with special pole plates. At least one pole plate (11d) is separated from a base part (11b) facing the yoke by a narrow correction air gap (15), and can be aligned by means of mechanical setting devices. According to the invention, each pole shoe (11) has a bead-like edge piece (11c) for field correction at its edge area (17b), which surrounds an inner pole shoe area (17a). In this region, the pole plate (11d), which can be aligned laterally separated from the edge piece (21).

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