Percy Spencer - Citizendia

Percy Spencer
Percy Spencer
Born	9 July 1894
Died	8 September 1970
Nationality	United States
Known for	Microwave oven

Percy Lebaron Spencer (9 July 1894 – 8 September 1970) was an American engineer and inventor. Events 455 - Roman military commander Avitus is proclaimed Emperor of the Western Roman Empire. Year 1894 ( MDCCCXCIV) was a Common year starting on Monday (link will display the full calendar of the Gregorian calendar (or a Common Events 70 - Roman forces under Titus sack Jerusalem. 1264 - The Statute of Kalisz Year 1970 ( MCMLXX) was a Common year starting on Thursday (link shows full calendar of the Gregorian calendar. The United States of America —commonly referred to as the A microwave oven, or a microwave, is a Kitchen appliance that cooks or heats Food by Dielectric heating. Events 455 - Roman military commander Avitus is proclaimed Emperor of the Western Roman Empire. Year 1894 ( MDCCCXCIV) was a Common year starting on Monday (link will display the full calendar of the Gregorian calendar (or a Common Events 70 - Roman forces under Titus sack Jerusalem. 1264 - The Statute of Kalisz Year 1970 ( MCMLXX) was a Common year starting on Thursday (link shows full calendar of the Gregorian calendar. The United States of America —commonly referred to as the Engineering is the Discipline and Profession of applying technical and scientific Knowledge and He became known as the inventor of the microwave oven. An inventor is a person who creates or discovers a new method form device or other useful means A microwave oven, or a microwave, is a Kitchen appliance that cooks or heats Food by Dielectric heating.

Spencer was born in Howland, Maine. Howland is a town in Penobscot County, Maine that was settled in 1818 The State of Maine ( is a state in the New England region of the northeastern United States of America, bordering the Atlantic Ocean His father died in 1897, and his mother left him a short time later. He lived with his aunt and uncle after that. He never graduated from grammar school, but went to work in a mill as an apprentice at age 12, before joining the U.S. Navy in 1912 to learn wireless telegraphy. Year 1912 ( MCMXII) was a Leap year starting on Monday (link will display the full calendar of the Gregorian calendar (or a Leap year starting The term Wireless Telegraphy is a historic term used today as applied to early Radio Telegraph communications techniques and practices He joined the Raytheon Company in the 1920s. Raytheon Company ( is a major American Defense contractor and industrial corporation with core Manufacturing concentrations in Defense systems The 1920s is sometimes referred to as the " Jazz Age " or the " Roaring Twenties " when speaking about the United States and Canada

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. Year 1941 ( MCMXLI) was a Common year starting on Wednesday (the link will display 1941 calendar of the Gregorian calendar. A cavity magnetron is a high-powered Vacuum tube that generates coherent Microwaves They are commonly found in Microwave ovens as well as various Microwaves are electromagnetic waves with Wavelengths ranging from 1 mm to 1 m or frequencies between 0 Radar is a system that uses electromagnetic waves to identify the range altitude direction or speed of both moving and fixed objects such as Aircraft, ships 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.

In 1945, a chocolate bar in his pocket melted while standing in front of an operating magnetron. Year 1945 ( MCMXLV) was a Common year starting on Monday (link will display the full calendar He then tested popcorn in front of the magnetron (surely turning up the power and standing out of the beam), and it quickly popped all over the room. Development of the microwave oven grew out of these observations, and by 1947 a commercial oven was being sold by Raytheon. A microwave oven, or a microwave, is a Kitchen appliance that cooks or heats Food by Dielectric heating. Year 1947 ( MCMXLVII) was a Common year starting on Wednesday (link will display full 1947 calendar of the Gregorian calendar. (Note: He got US patent 2,495,429 out of his invention of the microwave oven. A microwave oven, or a microwave, is a Kitchen appliance that cooks or heats Food by Dielectric heating. )

He became Senior Vice President and a senior member of the Board of Directors at Raytheon. He received 300 patents during his career at Raytheon; a building there is named after him. A patent is a set of Exclusive rights granted by a State to an inventor or his assignee for a fixed period of time in exchange for a disclosure of an Spencer was married and had three children, James, John, and George.

External links

References

© 2009 citizendia.org; parts available under the terms of GNU Free Documentation License, from http://en.wikipedia.org
network: | |