Nikola Tesla Patents
544 nected, respectively, to the terminal plates P and P¹. From the rings F, F¹, extend narrow metallic segments s and s which, by the rotation of the cylinder D are brought alternately into contact with double brushes b and b', carried by, and in contact with, conducting holders h and h', supported in metallic bearings G and G", as shown. The latter are connected to the terminals T and T of a condenser H, and it should be understood that they are capable of angular displacement as ordinary brush supports. The object of using two brushes, as b and b, in each of the holders h and h', is to vary at will the duration of the electric contact of the plates P and P with the terminals T and T', to which is connected a receiving circuit including a receiver R, and a device d, performing the duty of closing the receiving circuit at predetermined intervals of time and discharging the stored energy through the receiver. In the present case this device consists of a cylinder made partly of conducting and partly of insulating material e and e¹ respectively, which is rotated at the desired rate of speed by any suitable means. The conducting part e is in good electrical connection with the shaft S, and is provided with tapering segments ff', upon which slides a brush k supported on a conducting tod 1, capable of longitudinal adjustment in a metallic support m Another brush n is arranged to bear upon the shaft S, and it will be seen that, whenever one of the segments f comes in contact with the brush k, the circuit including the receiver R is completed and the condenser discharged through By an adjustment of the speed or rotation of the cylinder d and a displacement of the brush k along the cylinder the circuit may be made to open and close in as rapid succesthe same. -9
