Grammes dynamo-electrical machine
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Grammes dynamo-electrical machine
Engraving by W. Bazzett Murray showing Grammes direct-current dynamo. Zenobe Theophile Gramme (1826-1901) built the first successful dynamo in 1869, incorporating a ring-wound armature ( Gramme ring ), which after various improvements, he manufactured in 1871. It was the first electric generator to be used commercially, for electroplating as well as electric lighting
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Media ID 4361432
© Mary Evans Picture Library 2015 - https://copyrighthub.org/s0/hub1/creation/maryevans/MaryEvansPictureID/10216286
1826 1869 1871 1878 Armature Commercially Current Direct Dyn Amo Electric Electrical Electroplating Generator Improvements Incorporating Lighting Manufactured Murray Ring Successful Theophile Wound 1901 Gramme Zenobe
EDITORS COMMENTS
This engraving by W. Bazzett Murray depicts Zenobe Theophile Gramme's groundbreaking dynamo-electrical machine, which he built in 1869. Gramme is considered the father of the electrical industry for his invention of the first successful dynamo, featuring a ring-wound armature, also known as the Gramme ring. This design revolutionized the field of electricity, leading to its widespread use for various applications, including electroplating and electric lighting. Gramme's dynamo marked a significant milestone in the history of electrical engineering. Prior to its invention, electricity could only be generated locally and was not practical for long-distance transmission. However, Gramme's dynamo, with its efficient design and ability to generate a steady, continuous current, paved the way for the development of central power stations and the electrical grid. The machine shown in this engraving is a direct current (DC) dynamo, which converts mechanical energy into electrical energy through the movement of a rotor inside the machine. The armature, which is ring-shaped, is coated with a conductive material and wrapped with insulated wire. As the rotor turns, a magnetic field generated by the field coils causes the electrons in the wire to flow, creating an electrical current. Gramme continued to improve upon his design, and in 1871, he manufactured the dynamo on a commercial scale. This machine, which is depicted in the engraving, was a 21 horsepower, 2nd class dynamo, capable of producing 21 amperes of current at a voltage of 100 volts. The dynamo was imported into the United States in 1878 and was a major influence on Thomas Edison's development of the incandescent light bulb. Gramme passed away in 1901, leaving behind a lasting legacy in the electrical industry.
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