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October 21
 1833: Swedish chemist
Alfred Nobel,
who invented dynamite and who began the Nobel Peace Prize system, was born. 1879:
Thomas Edison demonstrated an
electric
light bulb that lasted for 13.5 hours. 1884: Thomas Edison received a patent
for his "electrical
indicator" that resembles a
d'Arsonval movement. 1914:
Samuel
Alderson, inventor of the crash test dummy, was born. 1915: The first trans-Atlantic
radiotelephone call was placed
between Arlington, VA, and Paris, France. 1923: The first
Carl Zeiss
projector planetarium opened at the Deutsches Museum in Munich, Germany. 1925:
The first U.S.-made photocell was demonstrated by Westinghouse. 1959:
Dr. Wernher Von Braun
began work at NASA after a transfer from ABMA. 1960: The first British nuclear submarine,
HMS Dreadnought, was launched. 1967: Danish astronomer
Ejnar Hertzsprung,
who co-developed the
Hertzsprung-Russell diagram relating star temperatures with brightness,
died. 1976: The United States made a clean sweep of the
Nobel Prizes, winning or sharing awards in chemistry, physics,
medicine, economics, and literature (no peace prize awarded). 2015: This is the
"Back to the Future Part II"
date that Marty McFly and Doc Brown travelled to help save the family
honor.
| 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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