the particle filled smoke enters from the direction shown by the arrow 120 the particles are negatively charged by passing by the electrodes 102 and are attracted to the positively charged cleaning disc 100 the disc 100 rotates and the brushes 106 constantly clean the disc by means of the disc 39 s rotating movement fig3 shows the sectional view of a different embodiment of the electrostatic cleaner the main difference from the embodiment described in fig1 is the shape of the disc in this embodiment the charged cleaning device is a cylinder shaped drum 126 closed at both ends the drum 126 exposes more surface area and therefore attracts more particles onto its surface the brushes 106 clean the ends of the drum 126 in a similar way to the cleaning of the disc fig1 the brushes 107 rest against and touch the drum 126 along its length so that when the drum rotates the brushes 107 clean off any particles that have been attracted to drum 126 in other respects this embodiment works in a similar way to that in fig1 and fig2 the particle filled smoke flows in the direction of the arrow 120 passing the electrodes 102 which charge the smoke particles with a negative ionization the drum 126 is charged with a positive charge and thereby attracts the said particles onto its surface the drum 126 turns either by the inertia of the air moving past it with or without.