The U.S. Patents of Nikola Tesla

| Kategorie: Leták / Datasheet Sborník  |

Freely available at the U.S. Patent and Trademark Office

Pro: Neurčeno
Vydal: - Neznámý vydavatel

Strana 17 z 499

Vámi hledaný text obsahuje tato stránku dokumentu který není autorem určen k veřejnému šíření.

Jak získat tento dokument?






Poznámky redaktora
understood that the adjustment of the main brushes causes variations the strength the current independently the relative position said brushes the aux- 35 iliary brush. These brushes caused, however, great sparking upon the commu­ tator. Myimprovementhas, besides, the advantage to facilitate the self-exciting the machine in all cases where the resistance the field- 70 wire very great comparatively the resist­ ance the main circuit the start—for in­ stance, arc-light machines. and 5 convenient devices for obtaining the re­ quired extent motion with very slight 30 changes the current passing through the helices. In Figs. I have shown the moving cores Figs. improvement the auxiliary brush causes very little sparking, and 65 can taken off without breaking the circuit through the field-helices. Signed this 13th day May, D. These brush-holders are mova­ ble arcs concentric with the center the commulator shaft. In the form indicated Fig. instead solenoid, ati iron tube inclosing coil shown. this case I place the auxiliary brush near pref­ erence contact with the brush shown 75 Fig. Pinckney, WALLACE SERKELL. aud indicate the main- 40 brush holder, carrying the main brushes, and C the auxiliary-brush holder,carrying the aux­ iliary brush. all cases the adjustment may be such that current flows over the aux­ iliary brush when the dynamo running with its normal load. The piston the coil attached both brush-holders and 50 €'. When the brushes are moved directly by electrical devices, shown Figs. In Fig. the solenoid should be connected both and move them toward away from each other.336,961 in the shunt through O ', and the magnetism of the cores will partially neutralized the point greatest magnetism shifted, that it will more less remote from approach- 5 ing the armature, and hence the aggre­ gate energizing actions the field magnets . the armature will correspondingly varied. 55 I aware that auxiliary brushes have been used connection with the helices the field-wire; but these instances the helices received the entire current through the aux­ iliary brush brushes, and said brushes could 60 not taken off without breaking the circuit through the field. attached the auxiliary­ brush holder The adjustment effected by means spring and screw tightener. iron piston, the 45 solenoid Fig. 1885. and the same effect produced the action the cur­ rent the shunt passing through the neu­ tralizing-helix. the regula- io tion effected shifting the point great­ est magnetism, and Figs. and 5, these are constructed that the force exerted for adjusting practically uniform through the whole length motion. 25 There are several known devices for giving motion proportion electric current. I claim invention— The combination, with the commutator hav­ ing two more main brushes and auxil­ iary brush, the field -helices having their 85 ends connected the main brushes, and a branch shunt connection from interme­ diate point the field-helices the auxiliary brush, and means for varying the relative po­ sition upon the commutator the respective 9c brushes, substantially set forth. 15 The relative positions the respective brushes may varied moving the auxil­ iary brush the brush may remain qui­ escent and the corep connected the main­ brush holder A', adjust the brushes 20 their relation the brush if, how­ ever, adjustment applied all the brushes, seen Fig. NIKOLA TESLA, Witnesses: Geo. . this manner the part M'is com­ pletely cut out, and the part has con­ siderably smaller resistance than the whole length the field-wire the machine excites itself, whereupon the auxiliary brush isshifted 80 automatically its normal position