The U.S. Patents of Nikola Tesla

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Upon the pe- ripliery this commutator bear three brushes G II, the two former resting upon the con- So tinuons metallic portions the two heads, re­ spectively, the latter being position bear upon the projections and blocks alter­ nately. For certain purposes desirable for economical operation that there should no cessation the flow such currents, and my 3s present improvements have been devised with the object increasing the output given apparatus providing means which, without material additions complication of such apparatus, high-frequency currents 40 may produced thereby continuously or without periods rest. For many purposes has been found advantageous to construct the circuit-controller with in­ sulating and conducting segments equal 25 length, that the condenser connected with its discharge-circuit during one-half of the time only. NIKOLA TESLA, NEW YORK, Y. the 75 interposition mica other suitable insu­ lating material the two heads castings d are insulated from each other. 100 The brushes are connected with the main B through condensers N', respectively, and to the main through self-induction chok­ ing coils O', these latter being used order . Fig. only shown, and its plan of construction follows: 65 The letters designate two metal heads or castings with projecting portions d!, which, when the two heads are brought to­ gether and secured hub shaft, inter­ mesh, shown the drawings. SerialH o, 604,723. 55 Let designate the two conductors of any circuit from which the energy derived that converted into current high frequency. illustrative of modified embodiment the invention. follows from this that the working circuit, that which the high- frequency currents are developed form for 30 practical application, receives such currents during only one-half the time. a diagram similar that Fig.. APPARATUS FOR PRODUCING ELECTRIC CURRENTS HIGH FREQUENCY, SPECIFICATION forming art etters atent No, 577,670, dated February 23,1897. A pplicationfiled Septem ber3, 1896.) , To all luhom concern: Be known that citi­ zen the United. (H om odel. 70 The spaces between two adjacent projec­ tions bars are equal arc the width of one said bars and are filled with blocks e, preferably metal, insulated from the other conducting portions the device. The brush connected the main B through primary coil low self-induc­ tion inductive relation secondary 95 which constitutes the ultimate source the current high frequency which the appara­ tus designed develop and which feeds a circuit containing vacuum-tubes single terminal lamps M', other suitable devices. In the drawings hereto annexed, Figure 1 50 diagrammatic illustration the arrange­ ment and circuit connections the inven­ tion. Broadly stated, the improvement consists in the combination two condensers with a circuit-controller such character and so 45 operated single motive device to charge and discharge said condensers alter­ nately, -whereby one will discharging while the other being charged, and conversely. C circuit controller commutator, 60 portion only for convenience being shown in the figures. designed rotated by any suitable motive device, which, how­ ever, the shaft. States, residing New York, the county and State New York, 5 have invented certain new and useful Im­ provements Apparatus for Producing- Elec­ tric Currents Iligh Frequency, which the following specification, reference be­ ing had the drawings accompanying and to forming part the same. In order that the brushes may capable S5 of carrying any current which the operation of the apparatus may demand, they are made of large cross-section, the brush being ap­ proximately equal width one the pro­ jections segments d', the space be- 90 tween adjacent segments, that passing from one comes into contact with the next. sectional view part of the commutator employed; and Fig. The apparatus for converting electric cur­ rents ordinary character into those high frequency, which have heretofore shown and described applications for Letters 15 Patent, has usually comprised condenser and circuit-controller operated suit­ able motive device and acting alternately charge the condenser from suitable source of supply and discharge through circuit 20 such character render the discharge one very high frequency