Patent · US Expired

Electromagnetic overcurrent tripping device with adjustable armature air gap

US4297664A · kind A · utility

1Cited by

1References

5Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Manfred Kuger · Berlin, DE
Wolfgang Nawrot · Berlin, DE
Bernhard Preuss · Berlin, DE

Key dates

Filing date	Mar 28, 1979
Grant date	Oct 27, 1981
Priority date	—
Expiry date	Mar 28, 1999

Classification

Technology area (CPC H)Electricity
CPC primaryH01H2069/016
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A low voltage circuit breaker has an electromagnetic overcurrent tripping device consisting of a magnetic yoke, relative to the pole surfaces of which an armature is movably arranged. The spacing of the armature from the pole surfaces is established by a stop member carried on a stationary support. The stop member is in the form of a disc having pairs of pins on its opposite sides which are mounted on connecting lines which are perpendicular to each other. Which of the four stop surfaces of the stop member is set in place is decided by rotating the stop member by 180.degree. when it is facing one way or by reversing it, and rotating it 180.degree. in its new position to choose between the other surfaces. Both sides of the stop member carry markings for the tripping current level, the effective one being always readable in the upright position.

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