Nikola Tesla - Free-Energy Devices

380 INVENTIONS OF NIKOLA TESLA.widest spaces midway between such points and where the field isweakest. Since the core on one side is of opposite polarity tothe part facing it,all the projections of one polar face will be ofopposite polarity to those of the other face. Hence, althoughthe space between any two adjacent points on the same face maybe extremely small, there will be no leakage of the magneticlines between any two points of the same name, but the lines offorce will pass across from one set of points to the other. Theconstruction followed obviates to a great degree the distortion ofthe magnetic lines by the action of the current in the conductorD, in which it will be observed the current is flowing at any giventime from the centre toward the periphery in one set of radialparts a and in the opposite direction in the adjacent parts a'.In order to connect the energizing coil G, Fig. 204, with a sourceof continuous current, Mr. Tesla utilizes two adjacent radial portionsof the conductor D for connecting the terminals of the coilG with two binding posts M. For this purpose the plate D is cutvwwyy/tr m.mmmm ...'>FIG. 207.entirely through, as shown, and the break thus made isbridgedover by a short conductor c. The plate D is cut through to formtwo terminals d, which are connected to binding posts N. Thecore H H, when rotated by the driving pulley, generates in the conductorsD an alternating current, which is taken off from thebinding posts ST.When it is desired to rotate the conductor between the facesof a stationary field magnet, the construction shown in Fig.206, is adopted. The conductor D in this case is or may bemade in substantially the same manner as above described byslotting an annular conducting-plate and it supporting betweentwo heads o, held together by bolts o and fixed to the driving-shaftK. The inner edge of the plate or conductor D is preferablyflanged to secure a firmer union between it and the heads o. Itis insulated from the head. The field-magnet in this case consistsof two annular parts H H, provided with annular groovesifor the reception of the coils. The flanges or faces surrounding