Custom Search
Over 10000 Pages Indexed
|
| Your Host |
 KirtBlattenberger ... single- handedly redefining what an engineering website should be.
5CCG (5th MOB): |
|
Hobby & Fun
Airplanes and Rockets: Equine
Kingdom: |
|
•−• ••−• −•−• •− ••−• •
RF Cafe Morse Code >Hear
It<
|
|
Job Board |
|
About RF Cafe© |
|
RF Cafe E-Mail |
Day in Engineering History Archive - April 9
| 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.
April 9
1770: Thomas Seebeck, who discovered that an electric current flows between different conductive materials that are kept at different temperatures (Seebeck Effect), was born. 1864: Sebastian de Ferranti, an electrical engineer who developed the first 10 kV (4x previous) transmission system and components, was born. 1865: Robert E. Lee surrendered to Ulysses S. Grant at Appomattox Courthouse in VA. 1895: Astronomer James Keeler proved the rings of Saturn were composed of meteoric particles. 1899: James McDonnell, founder of the McDonnell Aircraft Company, was born. 1927: Bell Laboratories and the Department of Commerce held the 1st long-distance transmission of a live picture and voice (television) simultaneously. 1934: Oskar von Miller, who pioneered the electric power industry in Germany, was born. 1940: Germany invaded Denmark and Norway. 1953: Man in the Dark, the first 3D motion picture produced and released by a major company, was shown. 1959: NASA announced the selection of America's first seven astronauts: Scott Carpenter, Gordon Cooper, John Glenn, Gus Grissom, Wally Schirra, Alan Shepard and Donald Slayton. 1963: Winston Churchill becomes first honorary U.S. citizen. 1965: "TIME" magazine featured a cover with the entire "Peanuts" gang. 1967: The first Boeing 737 made its maiden flight. 2003: Newly liberated Iraqi citizens toppled a statue of Saddam Hussein in Baghdad.
| A Disruptive Web Presence™
Custom Search
Over 10,000 pages indexed! (none duped or pirated)
|
Read About RF Cafe Webmaster: Kirt Blattenberger KB3UON |
RF Cafe Software
RF Cascade Workbook |
| Product & Service Directory Personally Selected Manufacturers |
||
| RF Cafe T-Shirts & Mugs | ||
RF Cafe SoftwareCalculator WorkbookRF Workbench Smith Chart™ for Visio Smith Chart™ for Excel |
||
