•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Job Board

About RF Cafe™

Sitemap

Day in Engineering History Archive - January 15

| 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.

January 15

Lee de Forest Receives Patent for Triode Tube  Please click here to visit RF Cafe.

1861: The safety elevator was patented as a "Hoisting Apparatus" by Elisha Otis, of Yonkers, NY. 1870: The Democratic party was first represented as a donkey in a cartoon by Thomas Nast in Harper's Weekly. 1907: The three-element vacuum tube (triode) patent was issued to its inventor, Dr Lee de Forest as a "device for amplifying feeble electric currents - such, for example, as telephone currents." 1908: Edward Teller, "father of the H-bomb," was born. 1943: The Pentagon, the world's highest capacity office building, was dedicated in Arlington, VA. 1967 :The first Super Bowl was played as the Green Bay Packers of the NFL defeated the Kansas City Chiefs of the American Football League, 35-10. 1970: William Piper, designer of the infamous J-3 aircraft, died. 1974: "Happy Days" first aired on ABC. 2001: Wikipedia, the source used for many of the events listed here, first went online.


 
Custom Search
More than 10,000 searchable pages indexed.

Your RF Cafe
Progenitor & Webmaster

Click here to read about RF CafeKirt Blattenberger... single-handedly redefining what an engineering website should be.

View the YouTube RF Cafe Intro Video Carpe Diem!
(Seize the Day!)

5th MOB: My USAF radar shop

Airplanes and Rockets: My personal hobby website

Equine Kingdom: My daughter Sally's horse riding website