Nikola Tesla Patents
T keyed or clamped to the shaft C. The plate is formed with segmental extensions corresponding in number to the These segwaves of current which the generator delivers. ments are preferably cut away leaving only rims or frames, to one of the radial sides of which are secured bent metal plates E which serve as vanes to maintain a circulation of air when de vice is in operation. The segmental disk and vanes are contained wi thin a close insulated box or case F mounted on the bearing of the generator, or in any other proper way, but so as to be capable of angular adjustment around the shaft. To facilitate such adjustment, a screw rod P', provided with a knob or hand le, is shown as passing through the wall of the box. The latter may be adjusted by this rod, and when in proper position may be held therein by screwing the rod down into a depression in the sleeve or bearing, as shown in Fig. 1. Air Air passages G G. are provided at opposite ends of the box through which air is maintained in circulation by the action of the vanes. Through the sides of the box F, and through insulating gaskets H, when the material of the box is not a sufficiently good insulator, extend metallic terminal plugs K, K, with their ends in the plane of the conducting segmental disk D, and adjustable radially towards and from the edges of the segments. This, or similar devices, are employed to carry out the invention above referred to, in the manner illustrated in Fig. 3. -3115
