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Updated: May 6, 2025
For some years it was not found feasible to operate motors on alternating-current circuits, and that reason was often urged against it seriously. It could not be used for electroplating or deposition, nor could it charge storage batteries, all of which are easily within the ability of the direct current.
Hudson Maxim, ordnance and explosive expert, maker of the first smokeless powder adopted by the United States Government. The Inventors' Guild: Peter Cooper Hewitt, inventor of electric lamp, appliances to enable direct-current apparatus to be used with alternating-current circuits, and devices for telephones and aircraft.
This may be done in many ways for instance, by operating the induction coil which charges the condenser from an alternating-current machine of very low frequency, and preferably adjusting the discharge circuit so that there are no oscillations set up in it.
He also holds several patents for alternating-current machinery, and has written largely on electrical subjects. William Tweeddale, born in Ayrshire in 1823, rendered valuable engineering service in the Civil War, and was an authority on the sources and character of water supply.
It was installed under the care of the Trinity House, at the Dungeness Lighthouse, in June, 1862, and continued in use for about ten years. When this machine was shown to Faraday by its inventor, the veteran philosopher remarked, "I gave you a baby, and you bring me a giant." The alternating-current transformer is another gift of Faraday to the commercial world.
To control the speed and keep it at that required for the purpose, we have only to properly gear the motor to another of the ordinary type for alternating currents, namely, an alternating-current dynamo used as a motor. The charging of storage batteries would not be difficult with such a machine, even from an alternating-current line, though the losses might be considerable. First Annual Report.
The wonderful growth of the commercial applications of alternating currents during the past few decades would have been impossible without the use of the alternating-current transformer.
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