[ad_1] The reed switch was invented in 1936 by WB Elwood at Bell Telephone Laboratories. It is a magnetically operated switch used in burglar alarms, electrical circuit controls, and the communications industry. It consists of ferrous metal contacts or springy metal reeds inside a sealed glass tube. The switch is activated by a magnet or […]
[ad_1] Reed valves allow fluids to flow in one direction and have been used throughout history in water pumps, musical instruments, and forging bellows. They are commonly used in two-stroke gasoline engines to regulate the entry of fuel and air into the crankcase. They are generally made of durable, high-tech materials and are simpler in […]
[ad_1] John Reed was a revolutionary journalist and writer who covered the Mexican Revolution and the Russian Revolution of 1917. He wrote Ten Days That Shook The World and was a close friend of Bolshevik leader Vladimir Lenin. Reed died in Moscow in 1920 and is the only American buried in the Kremlin Wall Necropolis. […]
