Day in Engineering History Archive - September 29

September 29

1789: The War Department established a regular army. 1901: Italian-born Nobel physicist Enrico Fermi was born. 1913: Rudolf Diesel, German thermal engineer who invented the internal-combustion engine that bears his name, died. 1914: A patent for a "Phonograph Record" was granted to Thomas Edison. 1915: The first transcontinental radio telephone demonstration was given in New York City, where speech was transmitted via Arlington, VA to Mare Island at San Francisco, CA. 1925: Aerovironment founder Paul MacCready, designer of the Gossamer series of human and solar powered aircraft, was born. 1946: "The Adventures of Sam Spade" debuted on CBS Radio. 1950: General MacArthur's troops liberated Seoul, South Korea. 1990: The California Air Resources Board adopted the Zero Emission Vehicle (ZEV) mandate requiring 2% of vehicles beginning in 1998 (rising to 5% in 2001, 10% in 2003) must have no exhaust emissions.

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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.