. Electric railway gazette . of sheetmetal, as shown in Fig. i. The machines are calculated tobe equally as efficient dynamos,and are coming into use in manysmall isolated incandescent lightplants. For this purpose they arecompound wound, and the regu-lation, it is claimed, is so perfect that all butone lamp may be suddenly turned off with-out moving rheostat or brushes, and withoutnoticeable change in the brilliancy of the re-maining lamp. Their low speed makes them well suited fordirect connection to steam or gas engines, andthey are suitable for lighting railway trains,yachts, steamboats, e
. Electric railway gazette . of sheetmetal, as shown in Fig. i. The machines are calculated tobe equally as efficient dynamos,and are coming into use in manysmall isolated incandescent lightplants. For this purpose they arecompound wound, and the regu-lation, it is claimed, is so perfect that all butone lamp may be suddenly turned off with-out moving rheostat or brushes, and withoutnoticeable change in the brilliancy of the re-maining lamp. Their low speed makes them well suited fordirect connection to steam or gas engines, andthey are suitable for lighting railway trains,yachts, steamboats, etc., as also for any pur-pose where a low speed machine can beused. Sperry System of Electric Lighting. In the new Sperry dynamo we find some ofthe features contained in the earlier machines,which have stood the test of time, the increasedknowledge of electricity and magnetism havingfailed to suggest any better design or point outany fault in the principles or construction. Thefirst Sperry dynamos and lamps were brought out. Regulator—Spekry System. several years ago and during that time haveproved themselves the equal of other characteristic feature of the dynamo is theinternal pole-piece by means of which a muchlarger percentage of the armature wire isbrought directly under the influence of the in-ductive effect of the pole-pieces. The armatureis of the Gramme type, being a ring of largediameter, which feature permits a high periphe-ral velocity, causing the armature wires to cut
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1895
