. The railroad and engineering journal . cushion of air in chamber ; the striking cylinder is thus stopped without shock andwithout losing its force, while the compressed air in thechamber No. 1 expands and thus restores to the cylinderall the work which was absorbed in the compression. By the expansion of the air the striking cylinder is thusthrown down upon the anvil, producing a blow which willvary in intensity according to the speed of the shaft A. Vol. LXIII, No. 4.] ENGINEERING JOURNAL. 165 The forging is perfectly free under the hammer, sincethe latter rebounds immediately when the
. The railroad and engineering journal . cushion of air in chamber ; the striking cylinder is thus stopped without shock andwithout losing its force, while the compressed air in thechamber No. 1 expands and thus restores to the cylinderall the work which was absorbed in the compression. By the expansion of the air the striking cylinder is thusthrown down upon the anvil, producing a blow which willvary in intensity according to the speed of the shaft A. Vol. LXIII, No. 4.] ENGINEERING JOURNAL. 165 The forging is perfectly free under the hammer, sincethe latter rebounds immediately when the blow is forging can, therefore, vary very much in form andthickness without inconvenience, since the hammer ad-justs itself to any variation in thickness. of a double-acting steam-hammer, with this difference,that the movement is given by a belt and that there maybe secured in this way a considerable economy in generally, these hammers when in good orderand properly lubricated will utilize about 70 per cent, of. Juia. _ jjt- SSa J
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
