Thomas
Edison was a major player in the early days of electrification. He is known
for developing a commercially viable
incandescent
light. The
innovation
that made his light commercially successful was that he developed an entire
system for generating a distributing electric energy to make those lights work.
Edison designed a DC system, and he was a major proponent of DC. A
weakness of his system was distance. He could only supply power over a distance
of about a mile. If large areas were to be lit, a power station would be needed
every mile. This made it hard for Edison to market the system for community
lighting, though he successfully sold many systems to
manufacturers,
commercial establishments and very wealthy homeowners. In spite of the
limitations, he built a system to light a portion of
Manhattan; his
Pearl Street station began powering lights in
1882.
Though it was not obvious at first, it soon became clear that high
voltage AC could be transmitted over very great distances. The invention of
transformers in
Europe
provided a way for voltage to be stepped up for transmission and stepped back
down to levels appropriate for lighting.
George
Westinghouse adopted the AC system. The advantages of AC soon make
Westinghouse Electric Company a major competitor with Edison. Even Edison’s own
salesman began to ask for an AC system to sell, though he was reluctant to have
any involvement with AC.
Edison believed that AC and the high voltage used for its transmission
were dangerous. He also had business and personal reasons to oppose the
introduction of rival systems. He attacked the use of AC. He even went so far
as to aid an AC opponent who successfully lobbied to make electrocution by AC
power the official means of executing condemned prisoners in the state of
New York.
Westinghouse pressed on and won high profile contracts that proved the
safety and efficiency of his AC equipment. Notably, he had the major lighting
contract for the
White City of
Chicago’s
World Columbian Exposition of
1893. He also won
the contract to build generators for the hydropower plant at
Niagara Falls.
The promise of inexpensive power drew major manufacturers to the area before
the plant starting operating in
1895. This
surprised the investors, who had though the city of
Buffalo would be
the target market.
Though transformers made AC a very viable system, it had other
technological hurdles, such as difficulty powering motors.
Serbian-born
inventor Nikola Tesla
solved this problem with his induction motor. Like Edison, Tesla invented an
entire system for supplying electrical power to his motors, which could also
easily accommodate incandescent and arc lighting. The Niagara Falls system was
based on Tesla’s patented technology.
Tesla went on to invent and explore the potential of other electrical
devices, notably fluorescent lights and
radios.
Unfortunately, he was never able to create commercial products from these later
works. He fell on hard times and was quite poor for many of the last years of
his life. He died in
1943.
Westinghouse continued to grow his electrical empire. After the Panic
of
1907, in
which a banking crisis shook the
economy,
investors forced him out of the management of Westinghouse Electric. He had
four other companies to run. He didn’t care for the way
Wall Street
did
business
so he got involved in
Progressive politics.
He died in
1914.
If you’re interested in this book, you may also be interested in
Jonnes, Jill.
Empires of Light:
Edison, Tesla, Westinghouse, and the Race to Electrify the World. New York:
Random House,
2003.