Patent · US Expired

Electromagnetic switch

US5880658A · kind A · utility

8Cited by

5References

5Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Peter Donhauser · Schwandorf, DE
Johann Drexler · Schwandorf, DE
Wilhelm Holzer · Amberg, DE

Key dates

Filing date	Feb 19, 1998
Grant date	Mar 9, 1999
Priority date	—
Expiry date	Feb 19, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH01H50/546
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electromagnetic switching device for operationally switching currents in the load range and having an instantaneous release, connected in series, for protection against welding of the contacts (6) in the overload range is created, and has a high reliability and low overall volume. The electromagnet (2) of the switching device (1) is arranged in the middle relative to the contact bridge carrier (8) and coupled directly to the latter in the middle. The instantaneous release (3) acts via a rocker (15) on the movable contact (6) and is actuated only in the case of overcurrents, use being made of the fact that only the directly coupled drive system of the switching device is employed in the nominal current range.

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