Equipment e.g. lighting device, failure indicator, has coil that is not fed, in case of damage of one of two lights, and another coil permitting to move core and to close contactor which then feeds klaxon and warning light

摘要

The indicator has two branches (5d, 5g) feeding respective rear signaling lights (4d, 4g), and having respective coils (6d, 6g) of a current relay. The coil (6d) is not fed, in case of damage of the light (4d). The relay is unbalanced and the coil (6g), whose electromagnetic field is against that of the coil (6d), permits to move a core and to close a contactor (8) which then feeds a klaxon (11) and a warning light (12).