Significant-frequency alternators from the variable-reluctance form ended up used commercially to radio transmission in reduced-frequency radio bands. These have been useful for transmitting Morse code and, experimentally, for transmitting voice and music. In the Alexanderson alternator, the two the field winding and armature winding are stationary

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Making use of his understanding of spheres and triangles, Fuller's intention was to alter "human shelter."  He planned To accomplish this by applying the "sphere basic principle" to shelter building, building shelter extra cozy and effective, and (most significantly) generating shelter a lot more economically available to a higher amount of men an