Fig. 55a. Fig. 55b.
Dust-filter of Beth-Lübeck (after Albrecht)
Fig. 56.—Dust-filter of Beth-Lübeck—Detail
Collection of dust may take place in settling chambers as in a cyclone separator in which the air to be purified is made to travel round the interior of a cone-shaped metal receptacle, depositing the dust in its passage ([see fig. 54]).
Fig. 57.—Arrangement for Precipitating Dust (after Leymann)