Rudolph Diesel was born in France in 1858. He went into engineering school when he was 14. He began experimenting with ammonia engines. He invented the Diesel engine based on the Carnot cycle in 1843. The diesel engine doesn't use a spark to ignite. It uses hot compressed air. He built a 23 horsepower engine in 1896. Germans built diesel powered U-bots in 1912. It is used for heavy construction machinery.
Mice and rodents infest our houses! they spread the bubonic plauge. they carry diseases everywhere. Several mousetraps were made in the 1800s. James Keep patented a mouse trap in 1879. "Little nipper" was patented in 1898 in Britian. William C. Hooker invented the mousetrap in 1894. The mousetrap kills mice. It breaks their neck.
Marconi was born in Italy in 1874. He built his own transmitter at home. He invented the radio in 1845. Radio waves are launched from attenas. It can send multiple signals all at once. Italy was not interested at first. It gained publicity from an accident. A lot changed in just 40 years. Radio broadcasting appeared in the 1930s.
John Browning was born in Utah in 1855. He built his first rifle in 1878. He developed lever-action rifles and pump action shotguns. He invented the semi-automatic auto-5 shotgun in 1898. It is a faster and easier way to fire shotgun rounds. It was manufactured for about 100 years until 1998. He also invented the M2 machinegun.
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