![Day in Engineering History April 30 Archive - RF Cafe](../../../borders/logos/4-30.gif) April 30
1777: German mathematician and
experimenter in magnetism
Carl
Friedrich Gauss was born. 1897:
J.J.
Thomson first announced the existence of electrons at the Royal Institution
Friday Evening Discourse. 1900: Famous railway engineer
Casey Jones
met his end in a collision with another train crossing his track. 1935: U.S. patent
#2,000,000
was granted to Joseph Ledwinka for Vehicle Wheel Construction. 1945: As Russian
troops approached his Berlin bunker,
Adolf Hitler committed suicide along with his wife of one day,
Eva Braun. 1955: Mendelevium, element 101, was announced. 1964: The
FCC ruled that
all TV receivers should be equipped to receive both VHF (channels 2-13) and the
new UHF (channels 14-83). 1975: The
Vietnam
War ended when the government in Saigon announced its unconditional surrender
to the Vietcong - a slaughter ensued thereafter. 1997: London's
Big Ben ground to a halt for hours. 2001: California businessman
Dennis Tito arrived at the international space station aboard
a Russian spacecraft.
| 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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