A failure warning device for an LED comprises a first resistor (R1) connected in series with the LED, a second resistor (R3, R4) connected in parallel with the LED, and control means (IC) responsive the voltage across the second resistor (R3, R4) arranged ...

A warning lamp has a reflector (44) mounted on a rotary platform (20) which is journalled on a hollow pillar (18) and driven by an electric motor (70). A light source (42) is mounted on the pillar (18) and has a centre contact (48) engaging with a connecto...

A warning lamp has a reflector (44) mounted on a rotary platform (20) which is journalled on a hollow pillar (18), and a light source (42) mounted on the pillar (18) and having a centre contact (48) engaging with a connector (52) within said pillar (18). T...