Abstract: DC electromagnet comprising a magnetic circuit equipped with a yoke and a magnetic core fixed at its ends with vanes and capable of axial displacement. The magnetic core 21 is smooth and the vanes 22,23 are shrink fitted and fixed to the ends of the smooth core. One of the vanes 22 is fixed to the core in a reference position and is then put into contact with the associated flange 25 of yoke 14, and the other vane 23 is shrink fitted and pushed into an adjustable position determined by bringing the yoke 14 into contact with the other flange 26.

Abstract: DC electromagnet comprising a magnetic circuit equipped with a yoke and a magnetic core fixed at its ends with vanes and capable of axial displacement.

Abstract: Thermal triggering apparatus, for a protection device featuring an electrically conductive bimetallic strip and a plate of thickness (e) which supports the bimetallic strip. The bimetallic strip has a first end free that is capable of deforming and a second end or foot which is fitted into a cavity in the plate characterised in that the foot of the bimetallic strip passes through the cavity so that it protrudes below the bottom face of the plate by a length (a) that easily exceeds the thickness (e) of the plate, and the protruding part of the foot has an electrical connection point linked to a conductive part so as to form the direct heating element of the bimetallic strip.