| 摘要 |
The invention is structured on the basis of two flywheels (14) and (17) which are coaxial and having different diameters, upon which respective annular bands (15) and (18) are assembled, which are concentric and consequently parallel, bearing their respective alignments of images or figures that are collated with empty and transparent areas permitting the visualization of the inner band through the outer band, said bands having independent actuation by means of respective motors (13) and (19), in turn controlled by respective optic regulators (23) and (24), such that the movement of one of the annular and image-bearing bands (25) is totally independent from the other (28).
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