The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . ix equal portions, which vary in length according to theseason. These clocks are of three kinds. The first has a dial, on whichthe hours are printed, which turns with a varying speed, according tothe season, while the time is denoted by means of a fixed index. Thesecond has a dial rotating with a constant rate, but the points indicatingthe hours approach automatically nearer to the center when the seasoncalls for shorter hours. The third has no dial, but instead uses a verticalscale whic
The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . ix equal portions, which vary in length according to theseason. These clocks are of three kinds. The first has a dial, on whichthe hours are printed, which turns with a varying speed, according tothe season, while the time is denoted by means of a fixed index. Thesecond has a dial rotating with a constant rate, but the points indicatingthe hours approach automatically nearer to the center when the seasoncalls for shorter hours. The third has no dial, but instead uses a verticalscale which is traversed by an index attached to the weight; see Figs. 174and 175. The works consist of the drum, B, around which the cord windsfrom two other wheels, and a verge balance with spiral spring. Three Japanese Clocks. 202 thousand eight hundred vibrations are produced for each revolution ofthe drum. The w^eight is composed of the striking works and carries theindex A, which points to the hours as the weight descends. The strik-ing works consist of a barrel b. Fig. 176, with spring and a train of four. 0
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Keywords: ., bookcentury1800, bookdecade1890, bookidamericanwatc, bookyear1892
