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Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
ejector. While these devices properly belong to ejectors, which are considered at greater length under that title, it will be useful to give a slight sketch of the modes of utilizing the compressed air, the subject-matter of this article. The ejectors described are direct-acting and the pressure continuous. It remains to cite one or two employing the pulsative or alternate action of air. This is accomplished by alternate pressure and exhaust, and is claimed to be very effective. pease, March 28, 1865. The current of air is made to oscillate in the downcast tube, acting like an elastic piston in its effects upon the contents of the chamber A′, which is placed low down in the well A. Fig. 64. The upper end of the pipe is connected alternately with two cylinders, in one of which is a body of compressed air, while in the other is a partial vacuum; the exhaust and pressure of the respective vessels being effected by an air-pump. The rock-bar b is oscillated on its pivot, and