. Electrical world. FIG. 2.—LOW-VOLTAGE GENER.\T0R. taking into consideration variable brush resistance and variablespeed—better than a perfectly compounded machine and better thanan ordinary low-density shunt machine. The mechanical design of these machines is fully up to the mostmodern requirements, all of the shafts ^and bearings being large,well fitted and well oiled. The brush-gear has received muchthought. While apparently a minor detail, it is really one of themost difficult parts of the entire design. Nice judgment has tobe used in this part, for the currents carried are so out of prop
. Electrical world. FIG. 2.—LOW-VOLTAGE GENER.\T0R. taking into consideration variable brush resistance and variablespeed—better than a perfectly compounded machine and better thanan ordinary low-density shunt machine. The mechanical design of these machines is fully up to the mostmodern requirements, all of the shafts ^and bearings being large,well fitted and well oiled. The brush-gear has received muchthought. While apparently a minor detail, it is really one of themost difficult parts of the entire design. Nice judgment has tobe used in this part, for the currents carried are so out of propor-tion to the size of the machine that the resistance between thecommutator and the terminals has to be kept^ very low. In allsizes of this line of machines the only parts rising more than 40° the commutator and FlG. 3.—FIELD REGUL.\TOR. While advocating shutit machines for all ordinary work, themaker excludes special cases where it is necessary to keep a per-fectly even voltage or to obtain a greater range of regulation thanis advisable with a shunt machine. In such cases separate excitationis advised, the fields being wound for either no or 220 volts. Fivehundred volts is hardly advisable on account of the fact that thegreater number of these machines are used in plating or electro-typing establishments, where it is difficult to keep them free fromacids, or their fumes, and also from steam, etc. NEWS OF THE WEEK. Financial Intelligence. THE WEEK IN WALL STREET.—Depressing tendenciesabroad and comparatively poor railway earnings at home affectedprices of stocks unfavorably and restricted activity, and the marketwas dull and lifeless. The slackness of general trade, due to thesevere and protracted winter weather, was also a depressing United States Steel stocks, on the other ha
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
