Polarized electromagnetic relay

Claim 1

A polarized electromagnet relay including a casing an elongate armature pivotally supported at its center to be movable about a center pivot axis for angular movement between two contact operating positions an electromagnet received in the casing, said electromagnet having a core, exciter coil means about the core, and a pair of pole members extending from the ends of the core toward the ends of the armature on either side of the pivot axis; a bar-shaped three-pole magnetized permanent magnet disposed between the free ends of the pole members in closely adjacent relationship to the armature, said permanent magnet being magnetized to have same poles at its lengthwise ends and have opposite pole intermediate its end characterized in that a pair of movable contact springs carried by the armature to be moved into and out of contact with corresponding fixed contacts mounted on the casing; the improvement comprising: each of said movable contact spring extending along each lateral side of the armature and fixedly connected thereto at the portion intermediate its ends so as to be movable together with the armature, each movable contact spring being formed at its intermediate portion with a transversely extending pivot arm which joins fixedly with a portion of the casing, said pivot arm being integral with the movable spring to define itself a resilient torsion element of limited deformability whereby the armature is permitted to pivot about the axis of the pivot arms for movement between the two contact operating positions.