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Click here to read about RF CafeView the YouTube RF Cafe Intro VideoKirt Blattenberger
BSEE
KB3UON
EIEIO

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(Seize the Day!)

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Day in History Archive - April 29

April 29

Happy Birthday Philip H. Smith! -  Please click here to visit RF Cafe.

1879: Electric arc lights were used for the first time, in Cleveland's Public Square (then known as Monumental Park). 1893: American Nobel physicist Harold Urey, who discovered deuterium, was born.  1905: Philip H. Smith (rare photo), inventor of the Smith Chart, was born. 1913: Gideon Sundback patented the zipper. 1921: David Sarnoff became general manager of RCA. 1937: Wallace Carothers, developer of nylon, died. 1945: American soldiers liberated the Dachau concentration camp. 1953: The first 3-D television broadcast was made by KECA-TV in Los Angeles, CA. 1966: William Eccles, who coined the term "diode," died. 1997: Astronaut Jerry Linenger and cosmonaut Vasily Tsibliyev went on the first U.S.-Russian space walk.

| 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.
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.
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Webmaster:  Kirt Blattenberger, BSEE - KB3UON

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