Nikola Tesla - Free-Energy Devices

CHAPTER XI,TKSLADIRECT CURRENT ARC LIGHTING SYSTKM.AT one time, soon after his arrival in America, Mr. Tesla wasgreatly interested in the subject of arc lighting, which then occupiedpublic attention and readily enlisted the support of capital.He therefore worked out a system which was confided to a companyformed for its exploitation, and then proceeded to devotehis energies to the perfection of the details of his more celebrated" rotary field" motor system. The Tesla arc lighting apparatusappeared at a time when a great many other lamps and machineswere in the market, but it commanded notice by its ingenuity.Its chief purpose was to lessen the manufacturing cost and simplifythe processes of operation.We will take up the dynamo first. Fig. 271 is a longitudinalsection, and Fig. 272 a cross section of the machine. Fig. 273 isa top view, and Fig. 274 a side view of the magnetic frame. Fig.275 is an end view of the commutator bars, and Fig. 276 is asection of the shaft and commutator bars. Fig. 277 is a diagramillustrating the coils of the armature and the connections to thecommutator plates.The cores c c c c of the field-magnets are tapering in bothdirections, as shown, for the purposes of concentrating the magnetismupon the middle of the pole-pieces.The connecting-frame F F of the field-magnets is in the formindicated in the side view, Fig. 274, the lower part being providedwith the spreading curved cast legs e e, so that the machinewill rest firmly upon two base-bars, r r.To the lower pole, s, of the field-magnet M is fastened, bymeans of babbitt or other fusible diamagnetic material, the baseB, which is provided with bearings b for the armature-shaft H.The base B has a projection, p, which supports the brush-holdersand the regulating devices, which are of a special character devisedby Mr. Tesla.The armature is constructed with the view to reduce to a min-