. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . Fig. 10.—Sweets packing. Fig. 11.—Sweets packing. G06 PHONOGEAPH. brass mandrel, on which the cylinder which receives the record is slipped. The fine-threadedscrew serves to give the feed to the diaphragms, carrying them lengthwise of the wax cylin-der, so that the style traces a helix which is of the same piteli as the screw. There are two diaphragms-the first of glass, for receiving and recording tlie message,and
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . Fig. 10.—Sweets packing. Fig. 11.—Sweets packing. G06 PHONOGEAPH. brass mandrel, on which the cylinder which receives the record is slipped. The fine-threadedscrew serves to give the feed to the diaphragms, carrying them lengthwise of the wax cylin-der, so that the style traces a helix which is of the same piteli as the screw. There are two diaphragms-the first of glass, for receiving and recording tlie message,and the second of silk for interpreting tlie record, and articulating it afresh. Botli dia-phragms are enclosed in metal cases having openings to which fiexible tubes are listening tube is bifurcated, and at extremity carries a small, bent nozzle whi-hrests easily in the ear. The other tube, which is shown lying beside the instrument, is anordinary speaking tube. In the centre of each diaphragm is a style, the one for engravingbeing stiff and sliarp, while the other is hook-shaped, so that it drags over the recordwithout any tendency to cut down the elev
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
