COIN Russian patent published in 2002 - IPC

FIELD: ready money circulation. SUBSTANCE: coin has joined members defining cylindrical cavity in coin body and arranged symmetrically with respect to middle plane and axially aligned with coin rib cylinder. Temperature sensitive bimetal flat spring and counterweight are located inside coin cavity. Flat spring is coiled from tape in the form of Archimedes' spiral in axial alignment with coin rib cylinder and counterweight is positioned for displacement in middle plane about coin center. First end of spring is immovably attached to coin body. Spring coils are placed for thermoplastic displacement in middle plane. Second end of spring is capable of imparting motions to counterweight in proportion to temperature alterations corresponding to temperature values on lined scale applied to outer edge of face and/or reverse side of coin, so that each temperature value corresponds to single point of intersection of coin outer contour circle with coin radius line extending through center of gravity of counterweight. So, emission advantage is provided by imparting to coin a novel property of miniature instrument for determining ambient temperature. EFFECT: simplified construction and increased emission profit by imparting novel consumer property. 5 dwg