Percy Lebaron Spencer (July 9, 1894 - September 8, 1970), an American, was the inventor of the microwave oven. July 9 is the 190th day of the year (191st in leap years) in the Gregorian Calendar, with 175 days remaining. ... 1894 was a common year starting on Monday (see link for calendar). ... September 8 is the 251st day of the year (252nd in leap years). ... 1970 was a common year starting on Thursday. ... An inventor is a person who creates new inventions, typically technical devices such as mechanical, electrical or software devices or methods. ... Microwave oven A microwave oven is a kitchen appliance employing microwave radiation primarily to cook or heat food. ...
Spencer was born in Howland, Maine, orphaned at a young age, and raised by his aunt and uncle. He never graduated from grammar school, but went to work in a mill at age 12, before joining the U.S. Navy in 1912 to learn wireless telegraphy. He joined the Raytheon Company in the 1920s. This article is about the town of Howland, in Maine. ... The United States Navy (USN) is the branch of the United States armed forces responsible for naval operations. ... 1912 is a leap year starting on Monday. ... Wireless telegraphy is the practice of remote writing (see telegraphy) without the wires normally involved in an electrical telegraph. ... Raytheon Company (NYSE: RTN) is a major United States military contractor based in Waltham, Massachusetts. ... Sometimes referred to as the Jazz Age or primarily in North America as the Roaring Twenties. // Events and trends Technology John T. Thompson invents Thompson submachine gun, also known as Tommy gun John Logie Baird invents the first working mechanical television system (1925) Charles Lindbergh becomes the first person to... In 1941, magnetrons, which were used to generate the microwave radio signals that are the core mechanism of radar, were being made at the rate of 17 per day at Raytheon. While working there, Spencer developed a more efficient way to manufacture them, by punching out and soldering together magnetron parts, rather than using machined parts. His improvements were among those that increased magnetron production to 2,600 per day. For his work he was awarded the Distinguished Public Service Award by the US Navy. 1941 was a common year starting on Wednesday (link will take you to calendar). ... A magnetron is a high-powered vacuum tube that generates coherent microwaves. ... This page is about the radiation; for the appliance, see microwave oven. ... This long range radar antenna (approximately 40m (130ft) in diameter) rotates on a track to observe activities near the horizon. ... The United States Navy (USN) is the branch of the United States armed forces responsible for naval operations. ... He was a father of three Sons, James, John, and George. ----- Original Message ----- From: Deborah Gerard To: silver-list@eskimo.com Sent: Wednesday, October 26, 2005 10:16 PM Subject: CS>Radiation Ovens - The Proven Dangers of Microwaves Nazis Invented Them http://www.freerepublic.com/forum/a3a9ff25023c0.htm
