The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . firmlyupon it, as shown in Fig. 126. It can then be used in your lathe veryhandily, either with or without water. The best sizes for watchmakersuse are ^ in., i in. and \%. in. diameter. END STONE. The small stone disc on which a watch pivot rests,applied principally to escapement and balance pivots. Jewels with endstones are known as capped jewels. ENGINE TURNING. The wavy, curved lines used as decorationsfor watch cases. See Rose Engine. ENGRAVING BLOCKS. A mechanical device for holdin
The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . firmlyupon it, as shown in Fig. 126. It can then be used in your lathe veryhandily, either with or without water. The best sizes for watchmakersuse are ^ in., i in. and \%. in. diameter. END STONE. The small stone disc on which a watch pivot rests,applied principally to escapement and balance pivots. Jewels with endstones are known as capped jewels. ENGINE TURNING. The wavy, curved lines used as decorationsfor watch cases. See Rose Engine. ENGRAVING BLOCKS. A mechanical device for holding coins,jewelry, silverware, etc., while engraving. Fig. 127 is the usual form 159 Epicycloid. given to engraving blocks and is known as the flat base variety. has v^hat is known as the cannon-ball base, but the holding devicesare similar to the flat base. Various attachments are furnished for hold-ing rings, spoons, coins, etc. EPICYCLOID. A curve generated by a point in the circumferenceof a movable circle, as it rolls upon another circle. The teeth of driving,wheels are usually of this Fig. 127. Fig. 128. EQUATION OF TIME. The difference between mean andapparent, or solar, time. ESCAPEMENT. The mechanical device in a watch or clockby which the motion of the train is controlled so that the powermay be distributed uniformly. Saunier divides escapements into threeprincipal classes: Recoil, Dead Beat and Detached, i. Recoil escape-ments are so classed, because at a certain period of this action, the wheelmoves backward or recoils in a manner more or less marked. Theverge escapement in watches and certain forms of the anchor in clocks,,may be used as examples. 2. Dead Beat escapements are so called because except during theactual impulsion, the wheel remains stationary, a point being supportedeither against the axis of the balance itself, or against the accessory piece,concentric with this axis, which catches it in its movement of cylinder and duplex e
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