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Day in History Archive - April 27

April 27

Happy Birthday Samuel Morse! Click here to return to the RF Cafe homepage.Day in Engineering History April 27 Archive - RF Cafe1791: Samuel F.B. Morse, developer of Morse Code, was born. 1880: The first U.S. patent for an electric hearing aid was issued to F.D. Clarke and M.G. Foster. 1889: Lloyd Espenschied, co-inventor of coaxial cable, was born. 1896: Wallace Carothers, developer of nylon, was born. 1937: The first Social Security payment was made in the United States. 1946: The first commercial carrier ship to be equipped with radar, the SS African Star, was placed in service. 1953: In Operation Moolah, the U.S. offered $50,000 and political asylum to any Communist pilot that delivered a MIG jet. 1960: The first atomic powered electric-drive submarine, Tullibee, was launched in Groton, CT. 1989: Japanese industrialist Konosuke Matsushita, founder of the electronics company that bears his name, died.

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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.

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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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