Incandescent lamp, perfected, for public and industrial lighting (Machine-translation by Google Translate, not legally binding)

摘要

Incandescent lamp perfected for public and industrial lighting, essentially characterized by the fact of comprising two filaments in dependence on a system of three contacts arranged in its socket, which are related to a simple inverter, in order to obtain in the same lamp two Illuminations of different power according to the moment of your service. (Machine-translation by Google Translate, not legally binding)