PROTECTIVE SIGNALLING DEVICES FOR REGULATING VEHICULAR AND PEDESTRIAN TRAFFIC - NAMELY, HORNS, BELLS, LIGHT, SIRENS AND SWITCHES THEREFOR; ELECTRIC AND NON-ELECTRIC TRAFFIC SIGNALS FOR VEHICULAR AND/OR PEDESTRIAN TRAFFIC AND/OR MARINE TRAFFIC; SAFETY GATES FOR VEHICULAR AND/OR PEDESTRIAN TRAFFIC; AND NAVIGATION LIGHTS FOR AIR BORNE AND MARINE TRAFFIC