. American engineer and railroad journal . votal pin aresuch that the force is in-creased at the latterpoint. As the bearingface of the lock changesin direction so as to in-cline toward the centerline, or line of action ofthe pulling force. It com-mences to take a part ofthat force directly, whichincreases as the angleapproaches 90. At thesame time the portion of the force will also increase as the position of the lockapproaches the center line ; and if the position of thepivotal pin remains constant, the force to be resisted atthis point will proportionately decrease. This will bemade clear i
. American engineer and railroad journal . votal pin aresuch that the force is in-creased at the latterpoint. As the bearingface of the lock changesin direction so as to in-cline toward the centerline, or line of action ofthe pulling force. It com-mences to take a part ofthat force directly, whichincreases as the angleapproaches 90. At thesame time the portion of the force will also increase as the position of the lockapproaches the center line ; and if the position of thepivotal pin remains constant, the force to be resisted atthis point will proportionately decrease. This will bemade clear in the cases Immediately to follow. In fig. 4 Is illustrated a coupler in which the lock is ex-actly central, and the direction of its bearing surface coin-cides with a radial line drawn from the center of revolu-tion of the knuckle. In this instance the force pivotal pin is much less, and the pulling force is more equallydistributed to the knuckle and drawhead than in the fore-going example. If the lock remains In the same position.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
