Tesla's design varied from that of Faraday in two major ways. First, he used a magnet that was bigger in diameter than the disk so that the magnet completely covered the disk. Second, he divided the disk into sections with spiral curves radiating out from the center to the outside edge. Edison had nothing to do with this invention and in the other side of the coin, Frank Julian Sprague improved designs for a spring-loaded trolley pole.
Edison
The name of Edison's main rival was Nikola Tesla.
at the park
Nikola Tesla came to the United States in 1884 with an introduction letter from Charles Batchelor to Thomas Edison: "I know two great men," wrote Batchelor, "one is you and the other is this young man." Tesla spent the next 59 years of his productive life living in New York. Tesla set about improving Edison's line of dynamos while working in Edison's lab in New Jersey. It was here that his divergence of opinion with Edison over direct current versus alternating current began. This disagreement climaxed in the war of the currents as Edison fought a losing battle to protect his investment in direct current equipment and facilities.
He worked for edison.
Edison had his empire build on the Direct current and Tesla came with the alternate current which was better. In the end Nikola Tesla won.
Two words, Nikola Tesla
He worked with Edison.
Nikola Tesla.
'Thomas Edison did not pay his promised money so he left and started his company.
Nikola Tesla
The ruthless Thomas Alva Edison