. Elements of technology :. endulum or balance, while it re-ceives its motion from this wheel, becomes in its turn the regu-lator of its velocity. The crutch or anchor scapement, used in clocks, and thecommon pallet scapement with a contrate wheel, which isthe kind most extensively used in watches, have been alreadyexplained under the head of machinery, page 245. Thehorizontal scapement, Fig. 1. Fig. 1, consists of a wheelA, with elevated teeth,the outer surface of whichis curved teeth act uponthe edges of a hollowhalf cylinder, C, the axis of which is parallel to that of thewh
. Elements of technology :. endulum or balance, while it re-ceives its motion from this wheel, becomes in its turn the regu-lator of its velocity. The crutch or anchor scapement, used in clocks, and thecommon pallet scapement with a contrate wheel, which isthe kind most extensively used in watches, have been alreadyexplained under the head of machinery, page 245. Thehorizontal scapement, Fig. 1. Fig. 1, consists of a wheelA, with elevated teeth,the outer surface of whichis curved teeth act uponthe edges of a hollowhalf cylinder, C, the axis of which is parallel to that of thewheel, and carries the balance upon one of its a tooth of the scape wheel strikes the first edge of thecylinder, it causes it to recede, moving the balance in one di-rection. The tooth then enters the hollow part of the cylinderand strikes upon the opposite side. Before it can escape, thecylinder is obliged to turn in the opposite direction, and thus avibrating movement is kept up in the cylinder and ARTS OF HOROLOGY. 371 A multitude of other scapements, have also been introducedbv different artists, varying from each other in the complicationof their structure, and accuracy of their movements. Butthese must necessarily be omitted. The operation of the sim-pler forms already described, will be more intelligible taken inconnexion with the wheel work next to be noticed. Bescription of a Clock.—In PI. X, several views are givenof the mechanism of a clock, consisting of the going part,which moves constantly and carries the hands ; and the strikingpart, which announces the hour. Fig. 1, PI. X, is an eleva-tion of the clock with the wheels seen edgewise, shewing the go-ing part; the striking movements being omitted in diis figure, toavoid confusion. Fig. 2, is a front view of the wheel ivork ofboth going and striking parts; and Fig. 3, is the dial ivork ormechanism immediately under the dial, or face of the clock,and is that part which puts the striking tra
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