Firecracker for signals on the railways. (Machine-translation by Google Translate, not legally binding)

摘要

A firecracker for signals on the railways formed by a metal box consisting of a bottom and a cylindrical lid intended to contain the explosive paste that acts when breaking by the weight of the moving material glass cylinders embedded in the mass causing a vigorous friction of the and with it the explosion (Machine-translation by Google Translate, not legally binding)