. The railroad and engineering journal . f theship. The inventor remedies this defect by constructing theapparatus so that any pressure caused by the increased densityof the water has no effect upon such apparatus. Referring tothe illustration, the telephonic receiver C is secured concentri-cally within the cup D. By a passage E the cup D communi-cates with a closed tube/. Passing through the tube ./^ is asecond tube // having at its upper end an orifice /. One end ofthe tube // leads to the chamber C, and the other to a pressuregauge on the ship. A is the diaphragm of the receiver. Theaction
. The railroad and engineering journal . f theship. The inventor remedies this defect by constructing theapparatus so that any pressure caused by the increased densityof the water has no effect upon such apparatus. Referring tothe illustration, the telephonic receiver C is secured concentri-cally within the cup D. By a passage E the cup D communi-cates with a closed tube/. Passing through the tube ./^ is asecond tube // having at its upper end an orifice /. One end ofthe tube // leads to the chamber C, and the other to a pressuregauge on the ship. A is the diaphragm of the receiver. Theaction of the apparatus is as follows : Assuming the same tobe applied to a ship, any alteration that takes place in the posi-tion or motion thereof will cause a difference in the externalpressure acting upon the diaphragm A, which is counterbalancedinternally by the pressure of air in the chamber Cand tube Hcaused by the water rising in the chamber F in proportion tothe depth to which the instrument is immersed. This compen- FIG. 1 FIG. 2 i?7. salion takes place each time the apparatus is raised or loweredby the motion of the ship in the water, and ensures only thesound waves affecting the diaphragm. The area of the space /through which the water enters to the chamber F being equalto the area of the diaphragm A, an equal pressure acts uponeach when the instrument is so placed as to receive the full forceof the water through which it is passing, or which is passing it ;by this arrangement the equilibrium of the diaphragm is main-tained. —Industries. A Self-Destructive War-ship.—The accompanying illustra-tion shows a torpedo boat invented by Samuel Barton, of NewYork, and recently patented by him, the number of the patentbeing 423,405. It is substantially a huge torpedo, providedwith engine and boiler and carrying a crew, and is also providedwith a steam launch by vphich the crew may make their escapeafter bringing the ship into action. The forward part of the vessel is of a conica
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
