Oliver B. Shallenberger
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Oliver Blackburn Shallenberger was an American electrical engineer and inventor. He is associated with electrical inventions related to alternating current. He is most noted for inventing the first su
Oliver Blackburn Shallenberger
Shallenberger's Meter
Patent of Shallenberger's Meter
Frank J. Sprague
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Frank Julian Sprague was an American inventor who contributed to the development of the electric motor, electric railways, and electric elevators. His contributions were especially important in promot
Oliver B. Shallenberger
…He graduated in 1880 and was third of his class. Among the electricians and inventors that attended the Naval Academy around this same time were Frank J. Sprague, Dr. Louis Duncan, W. F. C. Hasson, and Gilbert Wilkes. Shallenberger then served the customary two year commitment serving on a government ship…
Frank J. Sprague, "father of electric traction"
Notes on seamanship, with drawings of sailboat parts, and electrical equipment, by Frank J. Sprague, 1878-1880
Postcard of electric trolley-powered streetcars of the Richmond Union Passenger Railway in Richmond, Virginia, in 1923, two generations after Frank J. Sprague successfully demonstrated his new system on the hills in 1888. The intersection shown is at 8th & Broad Streets.
Sprague Electric Company, 1898