Illuminated obstruction marker

Claim 1

A MARKER LIGHT AND THE LIKE ADAPTED TO BE POSITIONED IN HORIZONTAL SURFACES, SAID MARKER LIGHT COMPRISING: A METALLIC ENCLOSURE ADAPTED TO BE POSITIONED BENEATH SAID HORIZONTAL SURFACE WITH THE TOP SURFACE OF SAID ENCLOSURE BEING GENERALLY FLUSH WITH SAID HORIZONTAL SURFACE, A PARTITION IN SAID ENCLOSURE DIVIDING SAID ENCLOSURE INTO TWO INTERCONNECTED AIR SPACES, SAID PARTITION HAVING AN OPENING ADJACENT THE TOP SURFACE OF SAID ENCLOSURE COMMUNICATING SAID AIR SPACES, A LIGHT BULB IN ONE OF SAID AIR SPACES POSITIONED AT AN ELEVATION GENERALLY BELOW SAID OPENING IN SAID PARTITION, SAID PARTITION HAVING AN OPENING THERETHROUGH COMMUNICATING SAID AIR SPACES ADJACENT THE LOWER PORTION OF SAID LIGHT BULB, SAID ENCLOSURE HAVING AN OPENING IN ITS TOP SURFACE GENERALLY CENTERED OVER SAID LIGHT BULB, A HEAT RESISTANT GLASS LENS SECURED TO THE TOP OF SAID ENCLOSURE SEALING OFF SAID OPENING TO SUBSTANTIALLY ISOLATE THE AIR SPACE WITHIN SAID ENCLOSURE, SAID ENCLOSURE ALSO HAVING A VERTICALLY EXTENDING HOLLOW BOSS PROJECTING OUT OF SAID TOP SURFACE OF SAID ENCLOSURE BY A PREDETERMINED DISTANCE WITH THE SIDEWALLS OF SAID BOSS EXTENDING AROUND SAID OPENING IN SAID TOP SURFACE, AND A HOLLOW GENERALLY TUBULAR LIGHT TRANSMITTING MEMBER MADE FROM A BENDABLE TRANSLUCENT PLASTIC MATERIAL POSITIONED VERTICALLY OVER SAID HOLLOW BOSS, SAID TUBULAR LIGHT TRANSMITTING MEMBER EXTENDING A DISTANCE SEVERAL TIMES SAID PREDETERMINED DISTANCE ABOVE SAID TOP SURFACE OF SAID ENCLOSURE AND BEING ILLUMINATED INTERNALLY BY SAID LIGHT BULB, AND WHEREBY THE RADIANT HEAT FROM SAID LIGHT BULB IS CONFINED TO SAID CHAMBER IN WHICH SAID LIGHT BULB IS SITUATED AND CONVECTION CURRENTS FROM SAID LIGHT BULB ARE COOLED BY THE RELATIVELY COOL SURFACES OF THE OTHER OF SAID COMPARTMENTS FROM WHICH SAID PARTITION EFFECTIVELY ISOLATES RADIANT ENERGY.