Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . denoted by the marks at B in the same figure (this the workman can perform by reversing thehammer, without changing his position); the result will be to curl up the plate as denoted by thedotted lines. This effect is produced by two causes, the first of which is the shape of the hammer-face, and the second is the direction in which the blows fall. Fig. 2258 represents an iron plate. 2258. D nt with one each of the blows shown in Fig. 2257 delivered upon it, at B and C. Then, the indent
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . denoted by the marks at B in the same figure (this the workman can perform by reversing thehammer, without changing his position); the result will be to curl up the plate as denoted by thedotted lines. This effect is produced by two causes, the first of which is the shape of the hammer-face, and the second is the direction in which the blows fall. Fig. 2258 represents an iron plate. 2258. D nt with one each of the blows shown in Fig. 2257 delivered upon it, at B and C. Then, the indenta-tion of the plate being denoted by the full line, the tension caused to the surrounding iron will beindicated by the dotted lines. It will be noted that these dotted lines are in each case longer on oneside of the mark than on the other; and the reason is that the effect is greater on that side, or ratherin that direction, because the hammer does not fall vertically upon the plate, but somewhat the plate shown in Fig. 2257 be turned up on edge so as to appear as in Fig. 2259, the directionin which the hammer would travel when striking the blows at A in Fig. 2257 is denoted by thearrows B in Fig. 2259; while if we turn up the same plate so that its edge D in Fig. 2258 will ap-pear as the edge D in Fig. 2260, the direction of the blows shown at B inFig. 2257 will be denotedby the arrows B in Fig. 2260; so that both the shape of the hammer-face and the direction of theblow
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