Science . Front view. Side view. Fig. 3. Ancient Clock by Henry de Vick. From Fig. 3, giving both a front and aside view, the operation of the clock maybe clearly understood. The motion of thefalling weight A is transmitted by meansof the wheels G, e, H and g to the wheel I;this last wheel, by giving the pallets orshort levers, h, i, each a push alternatelyby two teeth, at opposite sides of its cir- 446 SCIENCE [N. S. Vol. XXV. No. 638 cumference, and moving in opposite direc-tions, one forward and the other backward,gives a vibratory motion to the verticalarbor K, and as the regulator or bala
Science . Front view. Side view. Fig. 3. Ancient Clock by Henry de Vick. From Fig. 3, giving both a front and aside view, the operation of the clock maybe clearly understood. The motion of thefalling weight A is transmitted by meansof the wheels G, e, H and g to the wheel I;this last wheel, by giving the pallets orshort levers, h, i, each a push alternatelyby two teeth, at opposite sides of its cir- 446 SCIENCE [N. S. Vol. XXV. No. 638 cumference, and moving in opposite direc-tions, one forward and the other backward,gives a vibratory motion to the verticalarbor K, and as the regulator or balancewas fixed on this arbor, it was thus madeto vibrate backwards and forwards at everypush of the escapement wheel upon the pal-lets, the period of the vibration being regu-lated by the position of the small weightsTO, m on its arms. Thus the whole dura-tion of a vibration was the measure oftime, and the wheels and pinions were em-ployed first to transmit the maintainingpower to the balance, and secondly t
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