Abstract: Device for reading and cancelling thin film areolae of material having uniaxial, magnetic anisotropy and deposited on credit cards or the like, comprising: (i) at least one head including a reading probe formed by a support member carrying at least an assembly formed by an excitation winding associated to a detection winding, said windings being wound in orthogonal relationship to each other around said support member; and at least a pair of cancellation electrodes assembled at the intersection area of said windings and adapted to provide an electric arc therebetween and to be faced to the areolae of the material to be examined and (ii) circuit means for producing the excitation current and for receiving the response signal representative of the characteristics of the material in the areola under examination, and for effecting a comparison of the phase and the amplitude of said signal with reference signals as well as for detecting eventually the rotation by 180.degree.

Abstract: Laminated springs for obtaining relay three-way switch and the like, made of an elastically deformable conductive metal, each having two fore elongated sustantially parallel arms extending along about the half of the spring length, near the free ends of which are fixed, contact pads having a substantially semi-cylindrical shape and applied thereon with their longitudinal flat surface so that the generatrices of each co-operating pairs of pads are set at right angles to one another, while at the back portion each laminated spring comprises a longitudinal tongue extending backwardly, having a predetermined length and bent at right angle in regard to the laminated spring plane, between the pair of fore arms and the rear tongue of each spring a through hole being bored. The invention also concerns the assembly method of said laminated springs and the relays obtained therewith.