An Air Filter of High Efficiency
Page 31
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' is not, perhaps, always realized hat from 90 to 98 per cent, of the nbustible mixture in an engine is ; therefore it would seem of some portance to ensure that, before it >ses into the engine, it should be as an as possible.
[-his is readily achieved by means of air filter of which there are many es available. One such is that twn as the Air-Maze, for which Airr-e (Great Britain), Ltd., Bush ise, London, W.C.2, is responsible. he two instruments directly applic
to road-transport units are those wn as being of the Oil Bath and maze types respectively, the essen differences between them being in one case, the instrument carries a quantity of free oil, and in the other the filtering element is merely impregnated with oil.
In the Oil Bath type the air and filter element is automatically washed by the action of the oil, a feature which will readily he appreciated by reference to the accompanying illustration.
The unusually large area of the filtering element, made possible by the circumferential disposition of the wire screens, which are graded in respect of their density, is said to give nearly 100 per cent. dust-filtering efficiency. Either type of filter can be cleaned and reassembled for further duty in a few minutes, but the design is such that there is no question of the filter element becoming clogged.