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Category Archives: History

Sir James Chadwick (1891-1974)

Sir James Chadwick, a British physicist, is best known for his discovery of the neutron. In 1911, Chadwick began research into the atomic structure which was to become a lifelong interest and which would eventually make him internationally famous. Chadwick’s … Continue Reading

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William Crookes (1832-1919)

William Crookes (1832-1919), a British scientist, was one of the discoverers of the cathode ray. In 1887 Crooke’s experimented by putting a small metal cross in the path of the rays coming from the cathode. The cross cast a shadow … Continue Reading

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Lee DeForest (1871-1961)

An American, often thought of as the “father of Radio” invented a vacuum tube in 1907 that could not only detect the signals but could amplify them to a level where they could be heard through a loud speaker. Fleming … Continue Reading

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Nikola Tesla

Nikola Tesla (1856-1943) Envisioned a world without poles and power lines. Referred to as the greatest inventive genius of all time. He claimed that he had visions, that each time he had one of these visions, the whole thing just … Continue Reading

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Albert Einstein (1879-1955)

Einstein’s formula proved that one gram of mass can be converted into a torrential amount of energy. To do this, the activity of the atoms has to occur in the nucleus. E = energy, M = mass, and C = … Continue Reading

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Isaac Newton (1642-1727)

Newton’s discoveries were not confined to mechanical science. He did his share of electrical experimenting. Although he was not intimately involved with electromagnetism, his thoughts on the properties of gravity, light, and mathematical contributions paved the way for future scientists … Continue Reading

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Michael Faraday – 1831

An Englishman, Michael Faraday (1791-1867) made one of the most significant discoveries in the history of electricity: Electromagnetic induction. October 1831 he discovered that by quickly moving a bar magnet into a coil of wire, which was connected to a … Continue Reading

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Thomas Edison – 1879

In 1879, Thomas Edison invented the light bulb. By using lower current electricity, a small carbonized filament, and an improved vacuum inside a glass globe, he was able to produce a reliable, long-lasting source of light.

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Hans Christian Orsted – 1820

In 1820, Hans Christian Orsted discovered that electrical current creates a magnetic field. This discovery made scientists relate magnetism to the electric phenomena.

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Benjamin Franklin – 1752

In June of 1752, Benjamin Franklin did an experiment with a kite one stormy night and discovered that lightning was electricity. He was investigating if lightning was an electric phenomenon.

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Trade Associations

GMD Electrical Inc. | IAEI

International Association of Electrical Inspectors

GMD Electrical Inc. | WLECA

Westchester Licensed Electrical Contractors Association