BIMETALLIC FUSE Russian patent published in 1995 - IPC

FIELD: electrical engineering. SUBSTANCE: fuse has insulating base, power leads in the form of flat metal strips, fixed contact mounted on one of leads, sensing element in the form of convex clicking blade with U-shaped projection and U-shaped lug in center of blade, movable contact mounted on U-shaped projection; convex clicking blade is essentially figure described around isosceles triangle inscribed in circle; figure sides are parts of circles described from vertexes of triangle and intersecting to form angles. U-shaped projection is located inside circle described around triangle. EFFECT: simplified manufacturing process due to provision for inscribing sensing element into circle with contour contacting three points, that is, provision for installing element in round-shaped matrix with its minimal displacement within matrix and for use of set of spherical molding tools which is more convenient and cheap in manufacture. 3 dwg