. Canadian forest industries 1894-1896. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. It is a very good test for an engineers judgment. The next thing to consider is the crank. Cut a smal stick that will just fit into the crank, and mark a linej across the center. Bring the crank pin up under the] line till it touches, and note whether the line crosses^ the mark on the stick, or how much of it is out ; and] then turn the crank around and bring the pin up under] the line on the other side. Note how much it is out ont that side, and if out, whether
. Canadian forest industries 1894-1896. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. It is a very good test for an engineers judgment. The next thing to consider is the crank. Cut a smal stick that will just fit into the crank, and mark a linej across the center. Bring the crank pin up under the] line till it touches, and note whether the line crosses^ the mark on the stick, or how much of it is out ; and] then turn the crank around and bring the pin up under] the line on the other side. Note how much it is out ont that side, and if out, whether it is on the same side of. the mark as before, or on the opposite. If on the same| side, it shows that the center of the pin is not in line! with the cylinder, and the shaft must be shoved endwise; until the line crosses it at the middle. If the construction of the engine will not allow this with the mean? at hand, take off from the side of the crank-pin boxes the amount that the line shows that it is out. Then fit pieces of brass on the other side of the crank-pin boxes to make up what has been taken off. If the boxes can be recessed for these pieces, all the better ; but if not, they can be fastened in with pins. If the line is on one side of the mark when the crank is on the center, and on the other side when on the other center, it shows that the shaft is not square with the cylinder, in which case the outer end of the shaft should be swung around to bring it straight with the line. If it should happen that the shaft could not be moved at that time, the distance that it must be moved can be calculated, and then it can be done any time afterwards. Suppose that Fig. 8 is a shaft and crank. It is plain that as the distance from the angle to 1, in either direc- tion, is the same, moving one of these points a certain distance will move the other one the same distance ; but if we double the distance to one of them, carrying us to 2, then we should move 2 twice the distance that w
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
