Patent · US Expired

Magnetic tripping device

US4698609A · kind A · utility

10Cited by

1References

11Claims

0Family size

Assignee

Brown, Boveri & Cie AG · DE

Inventors

Rolf Goehle · Leimen, DE
Volker Schmitt · Bammental, DE
Werner Bruckner · Kriftel, DE
Klaus Greefe · Heidelberg, DE

Key dates

Filing date	Apr 30, 1986
Grant date	Oct 6, 1987
Priority date	—
Expiry date	Apr 30, 2006

Classification

Technology area (CPC H)Electricity
CPC primaryH01H71/2481
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A magnetic tripping device for an electrical wiring device includes a U-shaped magnetic yoke, a cylindrical non-magnetic coil form having two end surfaces and a periphery and being disposed in the magnetic yoke, a magnetic core disposed in the coil form, a magnetic armature movably disposed in the coil form, and a compression spring disposed in the coil form between the magnetic core and the magnetic armature, the coil form having at least two radial embossings uniformly distributed over the periphery in the vicinity of the end surfaces for fixing the magnetic core in place in the coil form and for guiding the magnetic armature in the coil form with a limited stroke and a sliding fit.

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