VORTRAP

151

of view, to add the loading in a continuous stream after the stuff has passed
through the centrifugal machine. The section of the latest type of Erkensator
can be seen in Fig. 42, and the path of the stuff can be easily traced through
the machine (Fig. 43).

The maintenance costs of these machines are extremely low; there is nothing
to go wrong with them, except, perhaps, a bearing, and there are many of

[Wdmskys (Bury) Ltd.
PIG. 46.—THE VORTRAP, SHOWING THE COMELBTE ARRANGEMENT AND PATH TAKEN BY THE STUFF
these machines running continuously which have been in operation for 20 years
without having broken down, and with no expense for repairs.
THE VORTRAP
The Vortrap (Fig. 46) has been produced with the idea of separating
dirt and other impurities from the stock without employing the power
and apparatus required in other centrifugal machines. The principle of
it depends on centrifugal action. As will be seen in the accompanying
drawing, it comprises a vertical cylinder of small diameter divided in
sections by perforated partitions. The stuff is injected into the cylinder
tangentially, causing it to spin round rather like a vortex. This action
throws the heavy particles to the outside of the cylinder, and they rise up
to the top where they meet the upper partition. Here they are deflected