IEEE Power & Energy Magazine - March/April 2016 - 92
Electrical Exhibition in Philadelphia,
Pennsylvania, to almost uniformly
rave reviews, including a particularly
handsome one from an unexpected
source, Thomas Edison. The "Wizard" applauded, saying, "A young
man named Sprague, who resigned
his position as an officer in our Navy
to devote himself to electrical studies,
has worked the matter up in a very remarkable way. His is the only true motor; the others are but dynamos turned
into motors. His machine keeps the
same rate of speed all the time, and
does not vary with the amount of
work done, as the others do." But as
Sprague soon learned, inevitably each
new application required major redesign of his motors, especially when
used in the demanding weather environment of rail transportation.
Somehow during this flurry of activity, Sprague met, wooed, and, in the
spring of 1885, married a beautiful
southern belle named Mary Keatinge.
Over time she was unable to deal with
Frank's frantic work habits, and they
were amicably divorced in 1895. Their
only child, Desmond, was born in 1888
figure 7. An example of the steep and muddy grades on which the Richmond
City Railway had to operate, circa 1888. (Photo courtesy of John L. Sprague.)
and grew up to become a fine Cornelltrained engineer. He worked for his father on several projects, including MU
train control when he was only ten, and
of Frank's three sons by two marriages,
Desmond was his favorite.
Richmond, Virginia
After repeated failures in trying to interest New York City's Manhattan Elevated Railroad to use his new motors,
in the spring of 1887 SERM signed a
seemingly impossible contract to electrify Richmond's 12-mi (19.3-km)
horse-drawn street railway, a system
with up to 10% grades, tight turns, and
an uncertain muddy track (see Figure 7).
Further, SERM had to accomplish this
electrification within 90 days. Sprague
brought his new motors, the concept of
an overhead "trolley" source of power,
a new "wheelbarrow" motor truck design (see Figure 8), (which is used to
this day on street railways, elevated
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IEEE Power & Energy Magazine - March/April 2016 - Cover3
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