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Day in Engineering History Archive - September 19

Day in Engineering History September 19 Archive - RF CafeSeptember 19

1st Smiley Face Appeared on a Bulletin Board - Please click here to visit RF Cafe.1839: Chocolate maker George Cadbury was born. 1843: Gustave-Gaspard Coriolis, who discovered the differential circulation effect that bears his name, died. 1876: Inventor Melville Bissell received a U.S. patent for the carpet sweeper. 1928: The first airplane flight using a diesel engine was made in a Stinson Detroiter. 1957: The U.S. conducted its first underground nuclear test, in the Nevada desert, at Area 12 of the Nevada Test Site. 1968: American physicist Chester Carlson, inventor of xerography, died. 1982: The first "smiley-face" emoticon :-) appeared on an online bulletin board. 1986: My wonderful daughter, Sally, was born - Happy Birthday! 1988: Israel launched its first satellite, "Offeq-1" (Horizon 1), onboard a Shavit rocket, becoming the ninth country in space. 2006: RF Cafe became an international entity with the acquisition of the rfcafe.eu domain name.

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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.

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

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 World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

Copyright  1996 - 2026

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

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