Abstract: Thermal printing device is disclosed which prints on ordinary paper using an ink which melts when heated but is solid at room temperature.

Abstract: A pulse or stepping motor with a stator assembly and a rotor assembly has been found. The stator assembly comprises a cylindrical housing of ferromagnetic material, the first, second, third, and fourth ring shaped stators secured in said housing with some gaps between them, a pair of circular windings secured between the first and the third stators and between the second and the fourth stators respectively, the axis of said winding being identical or parallel to the axis of the pulse motor itself, each of said stators having a plurality of magnetic poles on the inner surface of the ring shaped structure, the angular duration of each magnetic pole of each stator being of uniform pitch.

Abstract: A magnetic relay having a core, coil, an armature with a pair of dielectric cards, a plurality of pairs of contact points and a contact spring, has been found. One of said dielectric cards pushes or releases the contact spring according to the electric current flowing in said coil and said pairs of contact points are closed or opened. The structure of the present relay is so simple that mass production and improvement of accuracy of the relay can be easily accomplished.