PARTICLE SEPARATORS AND SETTLER EQUIPMENT FOR SETTING HEAVY PARTICLES CARRIED BY A FLUID STREAM, A TYPICAL SEPARATOR CONSISTING OF A CONDUIT HAVING A PORTION IN THE SHAPE OF AN ELBOW, THE HEEL OF THE ELBOW BEING CUT AWAY, AND A TRAP COMPARTMENT COMMUNICATING WITH THE OPENING IN THE HEEL OF SAID CONDUIT FOR RETAINING THE SOLID MATERIALS THROWN OUT OF AN AIR OR GASEOUS STREAM CONTAINING PARTICULATE MATTER AND DRAWN THROUGH THE CONDUIT UNDER SUFFICIENT VELOCITY TO THROW OUT SUCH PARTICULATE MATT...