| 摘要 |
The invention relates to coins and can be used in cash flow of the state and at training pupils and students. In a round coin with smooth cylindrical ridge and marks on the outer edge an internal hollow is made in the form of two joined identical truncated cones directed to each other by truncated vertexes. The cone symmetry axes are perpendicular to the axis of coin ridge cylinder and form an oblique angle with a vertex in the coin center, the marks correspond to the points of intersection of the cone symmetry axes with the circle of coin outer contour, and a counterweight is made of loose material for possibility of gradual displacement thereof by gravity from one cone to another. Value of the oblique angle can correspond to the coin value. At that issue profit is increased, degree of counterfeit protection is enhanced. |
