Perfect control disc for limited parking zones. (Machine-translation by Google Translate, not legally binding)

摘要

Improved control disc for limited parking areas, characterized by being constituted by a main sheet, type decal, which has a void in its center, so that when it is adhered on the glass it leaves a free space, for which space a cylindrical piece of short length is adhered to the crystal itself, having a widened end in a larger diameter to facilitate the glue, the rest being a pivot or axis perpendicular to the crystal, which is used to mount a rotating disc on it, marked on two concentric crowns the figures corresponding to the arrival and departure times, whose crowns come to coincide in their passage with a window of trapezoidal shape provided in the main sheet, it being also foreseen to hold the disc by means of a washer that is introduced by the opposite end of the shaft with some pressure. (Machine-translation by Google Translate, not legally binding)