The U.S. Patents of Nikola Tesla

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The brush-holders B' 40 are connected means ofthelinks eaudtho cross-piece the iron core which slides freely the tube the solenoid. AUSTRIA-HUNGARY, ASSIGNOR THE TESLA ELECTRIC LIGHT ANT) MANUFACTURING COMPANY. To check somewhat the movement the core dash-pot, nsed. The core being iirst brought very nearly the required position relatively' to the solenoid means the screw the small screw . Over the brush-holders mounted the solen­ oid which rests upon forked column, c. In order effect the adjustment with greater precision the core provided with small 50 iron screw, . (No oduli To all whom- may concern: Be known that ikola esla, from Smiljaa Lika, border country Austria-Hun­ gary, have invented certain Improvements in 5 Dynamo-Electric Mad tines, which the fol­ lowing specification. convenient stop, 1, serves limit the upward movement the iron core. RAH­ WAY.l'. The other brush-holder, B', lias sleeve, and movable around the axis 30 the brush-holder this way both brush-holders can turn very freely, the fric­ tion the parts being reduced minim urn. 350,954, datec1 . Serial Xo. ' pplicniiim filed January 14. In other applications have shown the com­ mutator dyniimo-machine with the main brushes connected electric circuit, and io one moreauxiliary brushes serving shunt a part the whole the field-coils, the regu­ lation the current, being effected shifting- the-respective brushes automatically upon the commutator proportion the varying re- 15 sistances the circuit. NEW JERSEY. The piston 60 of the dash-pot provided with valve, V.s'. which opens downward pressure and al­ lows easy' downward movement the iron core but closes and checks the movement of the core when the same pulled under the 65 action the solenoid. 1,’ 0 the commutator: and B', the brash- 25 holders, carrying the main brushes a' and the auxiliary shunt brushes The axis of. The electrical circuit-connections are sub­ stantially the same, indicated former 75 applications, the solenoid being series with the circuit when the translating devices are in series and shunt when the devices are in multiple are. The adjustment such 7c that when the solenoid traversed the normal current just strong enough bal­ ance the downward pull the parts. The dash-pot con- 95 nected the iron core may ordinary' construction; but prefer, especially' ma­ chines for arc lights, provide the piston of . CotoSor IS, 1886.i. To balance the opposing forces, the weight of the moving parts, and the pull exerted by the solenoid upon the iron core, the weights YE Y V Tmay used. 13?,5'. My invention clearlyshownin theaccom- 20 panying drawings, which Figure ele­ vation the regulator with the frame partly in section: and Fig. 18?G. REGULATOR FOR DYNAMO-ELECTRIC MACHINES. 35 This column also affords support for the piv­ ots pp>, and fastened upon solid bracket or projection, which extends from the base of the machine, and preferably cast one piece with the same.s' then adjusted until the mag­ netic attraction upon the core the samewlien 55 the core any position. Theiron core has screw, means which it can raised and adjusted its position rel- 45 atively the solenoid, that the pull ex­ erted upon the solenoid practically uniform through the whole length mo­ tion which required effect the regulation. Mypresent invention relates the mechani­ cal devices which employ effect the shift­ ing the brushes.ite , NIKOLA TICSLA, QFSMILJAN LIKA. SPECIFICATION forming pari Letters Patent Ho. The operation the device follows: So When upon decrease the resistance the circuit some other reason the current in­ creased, the solenoid gains strength and pulls the iron core thus shifting the main brushes the direction rotation and the 85 auxiliary' brushes the opposite way. This diminishes the strength the current until the opposing forces are balanced and the solen­ oid traversed by' the normal current; but if from any cause the current the circuit 90 diminished, then the weight the moving parts overcomes the pull the solenoid, the iron core descends, thus shifting the brushes the opposite way and increasing the current to the normal strength. the brush-holder supported two pivot-screws, pp. section the line x:c, Fig