. Electrical world. EER. Vol. XLIII, No. 12. Fessenden Wireless Telegraph Patents. Three new patents were issued March 8 to Prof. R. A. these one^ is a subdivision of No. 753,863 and relates to wirelesssignalling as described in a previous article. The second patent-embodies specifically a radiator or resonator system as shown inFig. I. made in the form of a cone and having a large capacity. Thecone may be made of sheet metal or formed of a network of horizontal metal cone serves to deflect the radiated waves anddirect them along the surface of the earth. A horizontal c
. Electrical world. EER. Vol. XLIII, No. 12. Fessenden Wireless Telegraph Patents. Three new patents were issued March 8 to Prof. R. A. these one^ is a subdivision of No. 753,863 and relates to wirelesssignalling as described in a previous article. The second patent-embodies specifically a radiator or resonator system as shown inFig. I. made in the form of a cone and having a large capacity. Thecone may be made of sheet metal or formed of a network of horizontal metal cone serves to deflect the radiated waves anddirect them along the surface of the earth. A horizontal conductor,the length of which is equal to the base of the cone, extends in thedirection the waves are to be propagated and may include an in-ductance, as shown. The third patent^ relates to a method of transforming alternatingcurrents into high-frequency oscillations by operating a generatorwith a steam turbine. The inventor points out in this particularspecification that where a reciprocating steam engine is used to. FIG. I.— -ALTERNATING-CURRENT GENER.\TOR CON-NECTED TO STEAM TURBINE. actuate a generator it is not possible to obtain a high peripheralspeed of the moving coils of wire; that is to say, 3,000 or 4,000 not nearly great enough and to obtain speeds of 25,000 or 30, a steam turbine must be employed. By referring to Fig. 2 the steam turbine is represented connectedto a revolving-pole alternating generator operating a increased potential from the secondary charges the condensers,which finally disrupt an air-gap and so sets up oscillations in theradiator system, 5; thus a high peripheral velocity with small cir-cumference of moving parts may be obtained. The advantages of this improvement are illustrated by numericalstatements. It is claimed that a fundamental and radically new effectis obtained by employing a prime-mover having a constant torque tooperate a generator armature of small diameter, as for example, twofeet—and
Size: 3053px × 818px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
