[Electric engineering.] . mechanism inorder to bring out itsmethod of operation,and Fig. 34 shows thegeneral scheme of con-nections. In some re-spects, it resembles theBrush series open-arclamp previously de-scribed. It is of thedifferential type, andis provided with twoseries coils M and twoshunt coils vS. InFig. 33, only one of eachof these coils is seen,as they are in line witheach other. A tube Tholds the upper andlower parts of the lamptogether, and in it thecarbon holder 77, car-rying the upper carbonU, is free to slide upand down. Current iscarried to U by meansof the flexible asbestos-
[Electric engineering.] . mechanism inorder to bring out itsmethod of operation,and Fig. 34 shows thegeneral scheme of con-nections. In some re-spects, it resembles theBrush series open-arclamp previously de-scribed. It is of thedifferential type, andis provided with twoseries coils M and twoshunt coils vS. InFig. 33, only one of eachof these coils is seen,as they are in line witheach other. A tube Tholds the upper andlower parts of the lamptogether, and in it thecarbon holder 77, car-rying the upper carbonU, is free to slide upand down. Current iscarried to U by meansof the flexible asbestos-covered cable C, which follows thecarbon up and down through a slot cut in one side of thetube. The rocker is made up of two levers, a hingedat a and b hinged at b. These levers are connected by aspring c that will allow one armature to move independentlyof the other to a slight extent and make the action of thelamp steadier. The iron armatures d and e are carried bythese levers, as shown, and when one moves up the other. Fig. 33. 60 ELECTRIC LIGHTING. § 18 moves down a corresponding amount. Each armature isprovided with two holes, through which the conical polepieces project when the armature is pulled up. The clutchrod/ is attached to but insulated from the rocker a, and isfastened to the clutch g through the small link h. Therocker and clutch are shown in about the position they Line Line
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Keywords: ., bookcentury1900, bookdecade1900, bookidelectricengi, bookyear1902
