Nikola Tesla - Free-Energy Devices

DIRECT CURRKNT ARC LIGHTING SYSTEM. 461in the shape of a hollow cylinder, having on each side a segmentcut away, the width of which is equal to the width of the polepieces m' n'.The armature is soldered or otherwise fastened to the clamp /-,which is formed of a brass tube, provided with gripping-jaws eFig. 287. These jaws are arcs of a circle of the diameter of therod R, and are made of hardened German silver. The guides/"/', through which the carbon-holding rod E slides, are made ofthe same material. This has the advantage of reducing greatly thewear and corrosion of the parts coming in frictional contact withthe rod, which frequently causes trouble. The jaws e e arefastened to the inside of the tube r, so that one is a little lowerthan the other. The object of this is to provide a greater openingfor the passage of the rod when the same is released by theclamp. The clamp r issupported on bearings w w, Figs. 283,285 and 287, which are justin the middle between the jaws e e.The bearings w w are carried by a lever, t,one end of whichrests upon an adjustable support, of the side-, columns, s, theother end being connected by means of the link e' to the armature-leverL. The armature-lever L is a flat piece of iron in |sjshape, having its ends curved so as to correspond to the form ofthe upper pole-pieces of the magnets M and N. It is hung uponthe pivots v v, Fig. 284, which are in the jaw x of thetop plate B. This plate B, with the jaw, is cast in one pieceand screwed to the side columns, s s, that extend up from thebase A. To partly balance the overweight of the moving parts,a spring, ', Figs. 284 and 288, is fastened to the top plate, B,and hooked to the lever t. The hook o is toward one side of thelever or bent a little sidewise, as seen in Fig. 288. Bythis meansa slight tendencyisgiven to swing the armature toward thepole-piece m' of the main magnet.The binding-posts K K' are screwed to the base A. A manualswitch, for short-circuiting the lamp when the carbons are renewed,is also fastened to the base. This switch is of ordinarycharacter, and is not shown in the drawings.The rod E is electrically connected to the lamp-frame by meansof a flexible conductor or otherwise. The lamp-case receives aremovable cover, s 2 to inclose the,parts.The electrical connections are as indicated diagrammatically inFig. 289. The wire in the main magnet consists of two parts,a?' and p'. These two parts may be in two separated coils or in