Forest Preserve District of Cook County (Illinois)
Nature Bulletin No. 558-A March 15, 1975
Forest Preserve District of Cook County
George W. Dunne, President
Roland F. Eisenbeis, Supt. of Conservation
****:WINDMILLS
Two products of Yankee ingenuity -- barbed wire and the windmill --
played leading parts in the taming of the Wild West. Windmills made it
possible to build the railroads and establish the ranches and farms
which now occupy the Great Plains from Canada to Mexico. In that vast
territory, once known as "The Great American Desert, " the annual
rainfall is less than 20 inches -- frequently much less. Unless you have
lived there, you cannot realize how terribly hot and dry that country
becomes, nor how hard the winds may blow incessantly for days, weeks
or even months. Windmills made it possible to pump, from veins far
underground, water that was more precious than gold.
Windmills had been used in Europe since the 12th century, especially in
the Netherlands and Germany, but they were huge cumbersome
structures built to furnish great power for pumping large volumes of
water or grinding grain. Their sail wheels, 60 or more feet in diameter
and mounted on an enclosed tower, had from 4 to 6 radial arms that
almost touched the ground as they revolved. On each arm were
transverse slats over which a canvas sail had to be unfurled and
stretched each time the mill was operated.
In the German type, the entire tower was rotated around a central post,
by hand, to keep the wheel facing the wind. On the Dutch type only the
top or turret revolved and one of these was preserved in Mt. Emblem
Cemetery on Grand Ave. just west of the new Tri-State Tollroad. It was
built in 1847 and, until 1916, was used to grind grain into flour and
livestock feed.
In 1854, Daniel Halliday, a young mechanic in Ellington, Connecticut,
perfected a windmill that was not only much smaller and less expensive
than the European types but was portable and had two great
improvements. Its wheel was sectional, with wooden "sails," and was
automatically shifted into the wind by wind pressure on a vertical vane
or tail behind it. Further, there was a weight which acted like the
governor on a steam engine. When the wind's velocity caused the wheel
to spin too fast, the weight rose slowly and reduced the "pitch" of the
sails -- the area presented to the wind. Mounted on a tower or a barn,
the power was applied through a transmission device to a pump rod or
the shaft of a mill. The availability of water, because of this invention,
attracted ranchers and homesteaders. Soon the prairies were dotted with
windmills, mounted on crude wooden towers, looming above the stock
tanks and every railroad water tank. Halliday's shop was expanded into
the United States Wind Engine and Pump Company and relocated on
the Fox River at Batavia, Illinois. At the Philadelphia Centennial in
1876, the best windmill was the Eclipse, invented by a missionary to the
Ojibway Indians and later made by the Fairbanks-Morse Co. At one
time there were 30 to 40 such manufacturers. Gradually, the wooden
ones gave way to all-steel windmills with curved blades, such as Elgin's
Wonder (made in Elgin, I11. ), Woodmanse (Freeport, Ill. ), Baker
(Evansville, Wis. ) and Aermotor, manufactured in Chicago since 1888
and one of the few still made.
Almost every windmill you see in Illinois now is an Aermotor with its
patented self-oiling gear case. One huge ranch in Texas has more than
100 of them, serviced by a cowhand who travels in a jeep!
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