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This invention was only primarily used with steam locomotives that had booster valves or superchargers to heat the fire even hotter to produce extra power. The coal used was semi-bituminous and bituminous coal only inside the steam locomotives. Sadly, this invention lasted until 1960 when Diesel's fully replaced American railroads. 1943 Slinky
The following articles cover the timeline of United States inventions: Timeline of United States inventions (before 1890), before the turn of the century; Timeline of United States inventions (1890–1945), before World War II; Timeline of United States inventions (1946–1991), during the Cold War
By 1920, 254,000 miles (408,800 km) of standard-gauge railroad track had been laid in the United States, all of it owned or controlled by seven organizations. [45] The need to synchronize train schedules and the inefficiencies introduced by every city having its own local time, also led to introduction of Standard time by railway managers in 1883.
From the first Apple computer to the COVID-19 vaccine, here are the most revolutionary inventions that were born in the U.S.A. in the past half-century.
1920s: Culture Wars. As European economies recovered and the USA boomed in the wake of World War I, the number of Americans living in cities exceeded the number on farms for the first time.
1917–1920 – First Red Scare, marked by a widespread fear of Bolshevism and anarchism; 1918 – President Wilson's Fourteen Points, which assures citizens that the Great War was being fought for a moral cause and postwar peace in Europe; 1918 – Republicans win back Congress in the Midterm elections. 1918 – Armistice agreement ends World ...
The 1920s (pronounced "nineteen-twenties" often shortened to the "' 20s" or the "Twenties") was a decade that began on January 1, 1920, and ended on December 31, 1929. . Primarily known for the economic boom that occurred in the Western World following the end of World War I (1914–1918), the decade is frequently referred to as the "Roaring Twenties" or the "Jazz Age" in America and Western ...
1920: The first regularly operating radio station KDKA goes on air on 2 November 1920 in Philadelphia, USA. It is the first time electronics are used to transmit information and entertainment to the public at large. The same year in Germany an instrumental concert was broadcast on the radio from a long-wave transmitter in Wusterhausen.