. The Ontario high school physics. Fia. 90.—Raising the ships anchor by acapstan. FlQ. 89.—Windlass used in draw-ing water from a well. The capstan, used on board ships for raising the anchor,is another example (Fig. 90). The sailors apply the force bypushing against bars thrust intoholes near the top of the the rope is too long to beall coiled up on the barrel, so it ispassed about it several times andthe end A is held by a man whokeeps that portion taut. Thefriction is sufScient to prevent the rope from slipping. Sometimes the end B is fastened to a post or a ring on the dock
. The Ontario high school physics. Fia. 90.—Raising the ships anchor by acapstan. FlQ. 89.—Windlass used in draw-ing water from a well. The capstan, used on board ships for raising the anchor,is another example (Fig. 90). The sailors apply the force bypushing against bars thrust intoholes near the top of the the rope is too long to beall coiled up on the barrel, so it ispassed about it several times andthe end A is held by a man whokeeps that portion taut. Thefriction is sufScient to prevent the rope from slipping. Sometimes the end B is fastened to a post or a ring on the dock, and by turning the capstan this portion is shortened and the shij) is drawn into the Differential Wheel and Axle. This machine is shown in Fig. 91. It will be seen that the rope winds off one axle and on the other. Hence in one rotation of the crank the rope is lengthened (or shortened) by an amount equal to the difference in the circumferences of the two axles; but since the rope passes round a movable pulley, the
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectphysics
