Well
here I am on Wednesday afternoon, it is a cool and overcast
afternoon, feels like it is going to rain again. It rained this
morning when I dropped Leo off at school and went to my aqua class
but it fined up b around 10am.
This
week I am asking if you have heard of Percy Spencer, if not you are
not alone as I haven't heard of him till I Googled who invented the
microwave oven.
His
invention was an accident, that I had heard before, worked for a
company named Raytheon, developing microwave radar transmitters
during World War II. When one day in 1945, he noticed that a candy
bar he had in his pocket was starting to melt. He was not the first
to notice this phenomenon, but he was the first to investigate it.
He
decided to experiment using food, including popping corn kernels,
which became the world’s first microwaved popcorn. In another
experiment, an egg was placed in a tea kettle, and the magnetron was
placed directly above it. The result was the egg exploding in the
face of one of his co-workers, who was looking in the kettle to
observe.
Spencer
then created the first true microwave oven by attaching a high
density electromagnetic field generator to an enclosed metal box. The
magnetron emitted microwaves into the metal box blocking any escape,
allowing for controlled and safe experimentation. He then placed
various food items in the box, while observing effects and monitoring
temperatures.
The
first commercially produced microwave oven was about 6 feet tall,
weighed about 750 lbs, and cost about $5,000 US.
After
the war he used radar technology developed during the war to invent
the microwave oven, it was named the “Radarange” and was first
sold in 1946, the company Raytheon later licensed its patents for a
home-use microwave oven that was first introduced in 1955, but these
units were still too large and expensive for general home use. The
bench top microwave oven was first introduced in 1967,
and their use has spread into commercial and residential kitchens
around the world. In addition to their use in cooking food, types of
microwave ovens are used for heating in many industrial processes.
He
was born in Maine
18
months later, Spencer's father died, and his mother soon left him in
the care of his aunt and uncle. His uncle then died when Spencer was
just seven years old. Spencer subsequently left school to earn money
to support himself and his aunt. From the ages of twelve to sixteen,
he worked from sunrise to sunset at a spool mill. At 16 he discovered
that a local paper mill was soon to begin using electricity, a
concept little known in his rural home region, and he accordingly
began learning as much as possible about the phenomenon.
So
when he applied to work at the mill, he was one of three people hired
to install electricity in the plant, despite never having received
any formal training or even finishing
school.
At
the age of 18, Spencer decided to join the U S Navy, he had become
interested in wireless communications, while in the navy, he made
himself an expert on radio technology: "I just got hold of a lot
of textbooks and taught myself while I was standing watch at night."
he is reported to have said, he then taught himself trigonometry,
calculus. Chemistry. Physics and metallurgy among other subjects.
By
1939 Spencer became one of the world’s leading experts in radar
tube design.
For
his invention, Spencer received no royalties, but he was paid a
one-time $2.00 gratuity
from
Raytheon, the same token payment the company made to all inventors on
its payroll at that time for company patents.