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Day in Engineering History Archive - January 7

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| 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.
Please submit significant historical events and dates for inclusion in these lists. I will be glad to include your name and birthday. Please do not submit your death date ;-) A couple 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.

January 7

Marconi Established 1st Distress Signal.  Please click here to visit RF Cafe.

1610: Galileo Galilei sighted four of Jupiter's moons (Io, Europa, Ganymede, and Callisto). 1785: Jean Blanchard and John Jeffries made first air crossing of the English Channel from England to France in a hot-air balloon (first international flight). 1904: Marconi established "CQD" (-·-· --·- -··, CQ=be quite and listen, D=distress) as the first international radio distress signal, but two years later, "SOS" (··· --- ···, Save Our Souls) became the radio distress signal because it was faster to send by wireless radio. 1927: Commercial transatlantic telephone service was inaugurated between New York and London. 1935: Sir Alfred Ewing, the physicist who discovered and named hysteresis, died. 1943: Serbian-American high voltage experimenter Nikola Tesla died. 1980: The first solar-cell power plant  was dedicated at Natural Bridges National Monument, UT (266,029 solar cells in 12 producing 100 kW). 1998: Richard Hamming, of error correction code fame, died. 2004: American electrical engineer Oswald "Mike" Villard Jr., who developed over-the-horizon radar, died.


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