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Updated: May 13, 2025
Taking advantage of this system, and combining with it another scientific principle of wide applicability, Mr. J.H. Greathead has brought out an instrument called the "injector hydrant," which seems likely to play an important part in the extinguishing of fires.
He glanced at the indicator-screen to make sure he was getting the indoctrination he called for, and then sat down in the chair and lowered the helmet over his head, inserting the ear plugs and fastening the chin strap. Then he touched his left arm with an injector which was lying on the arm of the chair, and at the same time flipped the starter switch.
A disk or other valve, A, is pivoted in an aperture in a diaphragm dividing the outlet of the injector, and is operated by means hereafter described, so as to diminish the stream of water on one side and increase it on the other, so that one motor, and consequently the corresponding propeller, is driven at a higher speed than the other, and so steers the torpedo.
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