Rudolf Diesel was born in France in 1858. He Went into engineering school when he was 14. He began experimenting with ammonia engines. Invented Diesel engine based on Carnot cycle in 1893. Diesel engines don’t need a spark to ignite. It Uses hot compressed air. Diesel fuel specially designed to work in Diesel engines. More fuel efficient and reliable than gasoline engines. It produces high torque at RPMs. The commercial world brought into Diesel engines immediately in 1894. Built 23 HP engine in 1896. Diesel-powered ships appeared in 1903. Germas built diesel-powered U-boats in 1912. Diesel engines began replying to steam locomotives in the 1910s.
Several mouse traps had been built in the 1800s. James patented a trap in 1879. “Little Nipper” patented in 1898 in Britain. William C. Hooker invented the modern mousetrap in 1894. Mouse Traps kill mice. Spring-loaded bar swings down and breaks the neck of the mouse. The traps effectively eliminate the mice. It prevents further spread of disease from the mice. Patent holders sold to bigger companies. Hooker and Mast manufactured improved versions. Over 4,400 patents developed from 1838 to 1996.
Marconi was born in Italy in 1874. He became interested in Hertr’s experiments. Noticed no one applying waves practically. Applied them to wireless telegraphy. He built his own transmitters at home. He invented the radio in 1895. Radio waves are eaunchent from antennas. From 3 KHZ to 300 GHZ. AM and FM are important. Amplitude modulation changes the wave’s strength. Frequency modulation changes the wave’s frequency. AM is good for voice FM is for music. It transmits to multiple listeners at once. Other methods besides AM and FM. Italy wasn’t interested at first. The British were interested. Public lectures by the British government made Marconin world-famous. Gained publicity from the Titanic accident.
John Browning was born in Utah in 1855. He built his first rifle in 1878. Winchester purchased this model from Browning. Browning developed lever action rifles and pump-action shotguns. He invented the semi Automatic Auto- 5 shotguns in 1898. The semi-auto shotgun automatically loads the next shell after firing. There were several methods for doing so. Easier and quicker to fire shotgun rounds. Advertised to hunters and sportsmen. Was legendary by the 1940s. Manufactured for 100 years until 1998.