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  April 29
1879:
Electric arc lights
were used for the first time, in Cleveland's Public Square (then known as Monumental
Park). 1893: American Nobel physicist
Harold Urey, who discovered deuterium, was born. 1905:
Philip H. Smith, inventor
of the Smith Chart, was born. 1913: Gideon Sundback patented the zipper. 1921:
David Sarnoff became general manager of RCA. 1937:
Wallace
Carothers, developer of nylon, died. 1945: American soldiers liberated the Dachau
concentration camp. 1953: The first
3-D television
broadcast was made by KECA-TV in Los Angeles, CA. 1966:
William Eccles, who coined the term "diode," died. 1997: Astronaut
Jerry Linenger and cosmonaut Vasily Tsibliyev went on the first
U.S.-Russian
space walk.
| Jan
| Feb | Mar |
Apr | May |
Jun | Jul |
Aug | Sep |
Oct | Nov |
Dec |
Note: These
historical tidbits have been collected from various sources, mostly on the Internet.
As detailed in
this article, there
is a lot of wrong information that is repeated hundreds of times because most websites
do not validate with authoritative sources. On RF Cafe, events with
hyperlinks have been verified. Many years ago,
I began commemorating the birthdays of notable people and events with
special RF Cafe logos.
Where available, I like to use images from postage stamps from the country where
the person or event occurred. Images used in the logos are often from open source
websites like Wikipedia, and are specifically credited with a hyperlink back to
the source where possible.
Fair Use laws permit
small samples of copyrighted content.
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