Novel safety device for automatically changing a lamp in an electrical signalling system.

摘要

This device is characterised in that it consists of at least two elements 1 which are formed from a portion of concave or dichroic mirrors, each of these elements being provided with a light source 2, the said elements being assembled so that the point 5 of intersection of the longitudinal axes of the said elements coincides with the focal points of each of the said elements and corresponds to the distance between the object to be illuminated and the aforementioned light sources. Application to electric signalling systems. IMAGE