Celestial planisphere with lighting (Machine-translation by Google Translate, not legally binding)

摘要

Celestial planisphere with lighting; characterized essentially by comprising, in the discoidal plate bearing the signs representative of the stars, at least one opening occupied by a light source whose rays find transmission medium, up to all the middle and peripheral parts of the discoidal plate, through its own formant material, said luminous focus advantageously consisting of a glow lamp supplied by means of a battery housed inside a housing box attached, with the possibility of separation, to the non-functional face of the disc-shaped plate bearing the signs, including said complete the filament circuit and a switching device. (Machine-translation by Google Translate, not legally binding)