On January 26, 1926, John Logie Baird (1888 – 1946) a Scottish
inventor, gave the first public demonstration of a true television
system in London (above), which launched a revolution in the
communication and entertainment fields.
Baird’s invention, a pictorial-transmission machine he called
a “televisor,” used mechanical rotating disks to scan moving
images into electronic impulses. This information was then
transmitted by cable to a screen where it showed up as a low-
resolution pattern of light and dark.
Baird’s first television program showed the heads of two
ventriloquist dummies, which he operated in front of the
camera apparatus out of view of the audience (below).
The original television model, invented by the Scottish
television pioneer John Logie Baird.
This image is the first recorded picture taken from a TV
screen.
Irish-Italian inventor Guglielmo Marconi ushered in a new era of
global communications, sending the first radio transmission
across the Atlantic Ocean on this day in history, Dec. 12, 1901.
The message was the letter "s" in Morse code (dot-dot-dot). But
it proved after years of advances by Marconi that radio could
make the world a smaller place.
The wireless signal traveled 2,000 miles from a transmitting
station in Poldhu, Cornwall, in the far southwestern corner of
England, to a receiving station in St. John’s, Newfoundland.
Guglielmo Giovanni Maria Marconi
(25 April 1874 – 20 July 1937)
The phonograph was invented in 1877 by Thomas Edison,
Alexander Graham Bell‘s Volta Laboratory made several
improvements in the 1880s and introduced the graphophone,
including the use of wax-coated cardboard cylinders and a
cutting stylus that moved from side to side in a zigzag groove
around the record. In the 1890s, Emile Berliner initiated the
transition from phonograph cylinders to flat discs with a spiral
groove running from the periphery to near the center, coining
the term gramophone for disc record players.
Thomas Alva Edison (February 11, 1847 – October 18, 1931)
Garrett Augustus Morgan Sr.
(March 4, 1877 – July 27, 1963)
On November 20, 1923, the U.S. Patent Office grants Patent No.
1,475,074 to 46-year-old inventor and newspaperman Garrett
Morgan for his three-position traffic signal. Though Morgan’s
was not the first traffic signal (that one had been installed in
London in 1868), it was an important innovation nonetheless:
By having a third position besides just “Stop” and “Go,”
it regulated crossing vehicles more safely than earlier
signals had.
Morgan also invented a "safety hood smoke protection device"