Abstract: In the broader aspects of the invention there is provided an improved nozzle, an improved nozzle assembly and an improved method in which the improved nozzle comprises a protrusion having an distal end and a collar extending backward from the distal end. The collar is surface free of discontinuities. The outer end has an edge and an adjacent point at which the charge is concentrated. The protrusion has a fluid passage. The fluid passage is sealed from the collar surface. The fluid passage has an outlet adjacent the edge. A conductor is disposed in the protrusion. The conductor extends into the passage and is immersed in the fluid being disposed.

Abstract: An electrostatic gas cleaner can be provided to remove particulate matter, including particles of fluid, from gas exhausted from other apparatus. Such an electrostatic gas cleaner consists of wall means forming a large open flow path for gas to be cleaned. An electrode carrier is removably supported within said wall means and includes a plurality of projecting and electrically non-conductive portions to position and support the electrode carrier within the wall means and to position and support an electrode with respect to the wall means. The electrode carried by the electrode carrier creates an electrostatic field within the wall means. A gas to be cleaned is uniformly distributed and directed through the large open flow path formed by the wall means by a closure means at one end of the wall means. The electrostatic field from the electrode to the wall means charges and deposits particles carried by said gas on said wall means before they pass from the gas cleaner.