COIN-TIMER Russian patent published in 2011 - IPC A44C21/00 

FIELD: personal use articles.

SUBSTANCE: invention relates to coins and may be used in cash money circulation and in making manuals for studying physics and banking. In a round coin with a smooth cylindrical rib and strokes on an outer edge, the inner cavity is made in the form of two coupled identical truncated cones directed towards each other with truncated tops. Axes of cones symmetry are perpendicular to the axis of coin rib symmetry and form a blunt angle with the top in the coin centre. A counterbalance is made of loose material so that it could serially move in a self-flow from one cone to the other. Height of the blunt angle may correspond to the coin value.

EFFECT: increased issue profit and increased extent of counterfeit protection of a coin.

2 cl, 4 dwg