Archive for the 'Safety' Category
DOCUMENT ADOPTED ON THIS DAY IN 1776
In Philadelphia, Pennsylvania on July 4, 1776, the Continental
Congress adopted the Declaration of Independence, which
proclaimed the independence of the United States of America
from Great Britain and its king.
An F-15D Eagle assigned to the 142nd Fighter Wing, Oregon
Air National Guard Base, Ore.
A REMINDER FROM THE PDX RETRO BLOG
THREE-POSITION TRAFFIC LIGHT PATENT
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"
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