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The Microwave oven Percy Spencer 19-jul-1894 to 8-sep-1970 By Brigit Nelson Room 3.

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Presentation on theme: "The Microwave oven Percy Spencer 19-jul-1894 to 8-sep-1970 By Brigit Nelson Room 3."— Presentation transcript:

1 The Microwave oven Percy Spencer 19-jul-1894 to 8-sep-1970 By Brigit Nelson Room 3

2 Who he was/where he came from Percy Spencer, an American self-taught engineer from Howland,Manie, worked at the time with Raytheon. He was working on an active radar set when he noticed that a chocolate bar he had in his pocket started to melt - the radar had melted his chocolate bar with microwaves. The first food to be deliberately cooked with Spencer's microwave was popcorn Percy Spencer, an American self-taught engineer from Howland,Manie, worked at the time with Raytheon. He was working on an active radar set when he noticed that a chocolate bar he had in his pocket started to melt - the radar had melted his chocolate bar with microwaves. The first food to be deliberately cooked with Spencer's microwave was popcorn Percy Spencer invented the first microwave oven after World war Inform radar technology developed during the war. Named the "Rearrange", it was first sold in 1947 but these units were still too large and expensive for general home use. The countertop microwave oven was first introduced in Percy Spencer invented the first microwave oven after World war Inform radar technology developed during the war. Named the "Rearrange", it was first sold in 1947 but these units were still too large and expensive for general home use. The countertop microwave oven was first introduced in

3 What was happening in 1947 In 1947 Japan was recovering from WWII, they had lost 1.74 million soldiers and 1 million civilians. 66 cities including Hiroshima and Nagasaki had been bombed and left 30% of the population homeless. In Tokyo, the largest city 65% of all homes were destroyed, 5 million of Tokyo's 7 million people had left the city. The streets of every major city quickly became full of ex-soldiers, war widows, orphans, the homeless and unemployed, most of them starving. Infectious diseases, common during the war, now flourished. Tuberculosis killed more than all the other diseases combined, in ,241 people were reported to have died of TB. In 1947 Japan was recovering from WWII, they had lost 1.74 million soldiers and 1 million civilians. 66 cities including Hiroshima and Nagasaki had been bombed and left 30% of the population homeless. In Tokyo, the largest city 65% of all homes were destroyed, 5 million of Tokyo's 7 million people had left the city. The streets of every major city quickly became full of ex-soldiers, war widows, orphans, the homeless and unemployed, most of them starving. Infectious diseases, common during the war, now flourished. Tuberculosis killed more than all the other diseases combined, in ,241 people were reported to have died of TB.

4 Roswell UFO Incident Roswell UFO Incident The Roswell UFO incident took place in the U.S. when a flying object crashed on a farm near Roswell, New Mexico, on July 7. Although the crash is reported to be a military surveillance balloon by the U.S. government, the most famous explanation of what occurred is that the object was a spaceship containing alien life forms. Since the late 1970s, the Roswell incident has been the subject of conspiracy theories. The United States Army says that what was found near Roswell was debris from the crash of a surveillance balloon belonging to a top secret program. People who believe in UFOs maintain that an alien craft was found, its occupants were captured, and that the military engaged in a massive cover-up. The Roswell incident has turned into a legend, making the name "Roswell" synonymous with UFOs. The Roswell UFO incident took place in the U.S. when a flying object crashed on a farm near Roswell, New Mexico, on July 7. Although the crash is reported to be a military surveillance balloon by the U.S. government, the most famous explanation of what occurred is that the object was a spaceship containing alien life forms. Since the late 1970s, the Roswell incident has been the subject of conspiracy theories. The United States Army says that what was found near Roswell was debris from the crash of a surveillance balloon belonging to a top secret program. People who believe in UFOs maintain that an alien craft was found, its occupants were captured, and that the military engaged in a massive cover-up. The Roswell incident has turned into a legend, making the name "Roswell" synonymous with UFOs.

5 Statute of Westminster The Statute of Westminster Adoption Act 1947 removed all British restrictions on the New Zealand law-making process except for amendments to the Constitution. By passing the Act on 25 November, New Zealand adopted the Statute of westminster1931, an Act of the British Parliament which granted full sovereign status and Commonwealth membership to all countries that signed. The Statute of Westminster Adoption Act 1947 removed all British restrictions on the New Zealand law-making process except for amendments to the Constitution. By passing the Act on 25 November, New Zealand adopted the Statute of westminster1931, an Act of the British Parliament which granted full sovereign status and Commonwealth membership to all countries that signed. This is considered the time when New Zealand became fully independent as a nation. This is considered the time when New Zealand became fully independent as a nation.

6 What else he invented In 1941, as the U.S. was preparing to enter WW II, he focused his efforts on the magnetron, the microwave tube in which electrons generated from a heated cathode produce radiation that could be used in radar. Working night and day, he increased the efficiency of the magnetron and boosted output from one magnetron a week to an astonishing 2,600 a day. Radar sets Spencer designed were installed in U.S. bombers, where they were powerful enough to spot periscopes on German submarines. For this accomplishment, he won the Distinguished Public Service Award, the highest honour the Navy bestows on civilians. Person Spensor held 120 patents within his lifetime. In 1941, as the U.S. was preparing to enter WW II, he focused his efforts on the magnetron, the microwave tube in which electrons generated from a heated cathode produce radiation that could be used in radar. Working night and day, he increased the efficiency of the magnetron and boosted output from one magnetron a week to an astonishing 2,600 a day. Radar sets Spencer designed were installed in U.S. bombers, where they were powerful enough to spot periscopes on German submarines. For this accomplishment, he won the Distinguished Public Service Award, the highest honour the Navy bestows on civilians. Person Spensor held 120 patents within his lifetime.

7 How the invention changed lives Microwave technology specifically in home use has changed the way that people prepare meals. Microwave technology specifically in home use has changed the way that people prepare meals. The amount of time saved allows people to have more time for recreation. The amount of time saved allows people to have more time for recreation. My mum says that it also reduces the amount of dishes she has to do. My mum says that it also reduces the amount of dishes she has to do. Saves room in your kitchen allowing for more compact living like apartments. Saves room in your kitchen allowing for more compact living like apartments. Using microwave ovens uses less electricity than conventional ovens. Using microwave ovens uses less electricity than conventional ovens.


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