Wilde's Dynamo

In 186305 Dr. Wilde invented the first separately excited dynamo, demonstrating that the feeble current from a small magneto-eletric machine could be made to produce currents of great strength from a large dynamo. Wilde's dynamo weighed 4.5 tons, and when driven at 1,500 revolutions per minute. The current fused 15 inches of round iron .25 inches in diameter with an expenditure of about 10 horse power. The is machine was used for electro plating purposes depositing 20 ounces of silver per hour. - There is a border around the image. Image size is correct. Many sizes available.