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Day in Engineering History Archive - April 5

April 5

1856: Black American educator & inventor Booker T. Washington was born in Franklin County, VA. 1894 : American aircraft designer Lawrence Bell, founder of Bell Aircraft (maker of the Bell X-1 the first broke the sound barrier), was born. 1951: Julius and Ethel Rosenberg were sentenced to death for conspiring to commit espionage for the Soviet Union. 1955: Winston Churchill resigned as British prime minister. 1963: The U.S. Atomic Energy Commission gave the Fermi Award to Robert Oppenheimer for research in nuclear energy (after declaring him a security risk in 1954). 1973: Pioneer 11 was launched on a mission to Jupiter. 1976: Billionaire Howard Hughes died. 1989: David Letterman became first network TV series to use Dolby stereo. 2063: Zefram Cochrane will make Earth's first warp-speed flight.

| 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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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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