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Life
wouldn't be the
same without them!
Here are a few of those
inventions that weren't "necessary" in the strictest
interpretation of the word, but have become
a part of our everyday lives.
The
Refrigerator
We go in the kitchen,
we open the door, and everything is cold.
And we take it for granted. But refrigeration
techniques have been evolving for 3000 years!
As early as 1000 B.C., the Chinese cut and stored
ice for use in warmer weather. "Ice Boxes"
were just that -- an insulated box with ice
in it that you set the food on. A lot
like some of the camper refrigerators used to
be.
It wasn't until the
18th century that scientist Michael Faraday
liquefied ammonia to cause cooling -- which
is the basis of today's refrigerators, freezers,
air conditioners and dehumidifiers. In
1911, General Electric released a home refrigerator
-- though it had compressors driven by long
belts attached to motors in the basement!
Automatic ice makers hit the market in the 1950s
and 1960s. Today, the fridge is one of
the most common home appliances, and is found
in 99.5% of homes in North America.
The
Dishwasher
Though the first patent
for a "dishwasher" was issued in 1850, the contraption
was made out of wood and had a hand-turned wheel
that splashed water on dishes. It didn't
really work, but it got a patent.
The real inventor of
what we call a dishwasher today was Josephine
Cochrane, a wealthy woman from Shelbyville,
IL who had a lot of dinner parties. Her
servants kept breaking her dishes, so in 1886
she made a machine that was totally automatic
and did the job better. A motor turned
the wheel, while hot soapy water squirted from
the boiler and rained down on the dishes.
She unveiled her invention at the 1893 World's
Fair in Chicago and won its highest award.
Mrs. Cochrane didn't
stop there. She patented her design and
went into production. Her company is now
the well-known upscale kitchenware corporation
KitchenAid. Dish washers caught on in
the 1950s when they were made smaller and cheaper,
thus attracting average homeowners.
Vacuum
Cleaner
Some inventors get
too involved in their ideas! Hubert Cecil
Booth of Gloucester, England, studied civil
and mechanical engineering. After seeing
a demonstration of a new American "cleaning
machine" that blew dirt into a collecting bag,
he began working on the idea that suction would
be better.
He tested his idea
by putting a handkerchief on a cushioned chair
and sucking on it very hard. Of course,
he started choking -- but when he turned over
the handkerchief, it was filthy from the dust
that had been trapped in it. He worked
for years on the concept, and to make it a practical
device (the first one used a suction pump that
had to be transported on a horse-drawn
carriage!) His breakthrough came when
he demonstrated it by cleaning a carpet in Westminster
Abbey for the coronation of Edward VII and Queen
Alexandra. They promptly had one installed
in the palace.
The
Toilet
This was another long-term
project -- over 500 years of innovation have
gone into the humble throne of today.
The very first flush toilet was invented by
Sir John Harington in the 16th Century for Queen
Elizabeth I. It was called a "water closet"
and was seen as a joke among England's peers.
It didn't catch on in his lifetime.
There were various
innovations along the way, but it was Thomas
Twyford who revolutionized the water closet
business in 1885. He was a leading potter,
and built his one-piece toilet out of china.
The toilets finally made it into homes in common
use beginning in the early 19th century.
To learn about other
fascinating details of appliances and items
we use every day, check out Marshall Brain's
How Stuff Works website:
Click
here to learn more!
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