ELECTRICAL SWITCHING APPARATUS AND RELAY INCLUDING A FERROMAGNETIC OR MAGNETIC ARMATURE HAVING A TAPERED PORTION

摘要

An electrical switching apparatus includes a ferromagnetic frame having first and opposite second portions, a ferromagnetic core disposed therebetween, a permanent magnet disposed on the first portion, a first tapered portion on the opposite second portion; a coil disposed about the core; and a ferromagnetic or magnetic armature including a first portion, an opposite second portion and a pivot portion pivotally disposed on the core between the portions of the armature. The armature opposite second portion has a complementary second tapered portion therein. In a first armature position, the armature first portion is magnetically attracted by the permanent magnet and the first and second tapered portions are moved apart with the coil de-energized. In a second armature position, the armature opposite second portion is magnetically attracted by the opposite second portion of the frame and the first tapered portion is moved into the second tapered portion with the coil energized.

主权项

1. An electrical switching apparatus, comprising:
a ferromagnetic frame including a first portion and an opposite second portion, the opposite second portion having a first tapered portion thereon; a permanent magnet disposed on the first portion of said ferromagnetic frame; a ferromagnetic core disposed between the first portion and the opposite second portion of said ferromagnetic frame; a coil disposed about said ferromagnetic core; and a ferromagnetic or magnetic armature including a first portion, an opposite second portion and a pivot portion between the first portion and the opposite second portion of said ferromagnetic or magnetic armature, the opposite second portion of said ferromagnetic or magnetic armature having a second tapered portion therein, wherein the pivot portion is pivotally disposed on the ferromagnetic core, wherein the second tapered portion is complementary to the first tapered portion, wherein when said coil is de-energized said ferromagnetic or magnetic armature has a first position in which the first portion of said ferromagnetic or magnetic armature is magnetically attracted by said permanent magnet and the second tapered portion is moved apart from the first tapered portion, and wherein when said coil is energized said ferromagnetic or magnetic armature has a second position in which the opposite second portion of said ferromagnetic or magnetic armature is magnetically attracted by the opposite second portion of said ferromagnetic frame and the first tapered portion is moved into the second tapered portion.