Nikola Tesla Patents
338 as shown. The latter are connected to the terminals T and T' of a condenser C, 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 P¹, with the terminels T and T', to which is connected a receiving circuit including a receiver R, and a device d, of the kind above referred to, which performs the duty of closing the receiving circuit at predetermined intervals of time and discharging the stored energy through the receiver pert. Sub. Spic. In the present case this device consists of a cylinderd made partly of conducting and partly of insulating material, e and e' 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 sagments fi, upon which slides a brush k supported on a conducting rod 1, capable of longitudinal adjustment in a metallic support m. Another brush n is arranged to baar upon the shaft S, and it will be seen that, whenever one of the segments i comes in contact with the brush k, the circuit, including the receiver R, is completed and the condenser discharged through the sama. By an adjustment of the speed of 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 succession, and remain open or closed during such intervals of time, as may be desired.
