Development of the Microwave Oven

By kairikairikairi
  • The first microwave oven

    The first microwave oven

    Spencer submitted his first patent application for heating food with microwaves.
    The patent described two parallel magnetrons that heat food that passes by on a conveyor belt.
  • Period: to

    Microwave oven throughout the years

  • Microwave-heating device enclosed in an oven

    Spencer's co-workers, applied for a patent for a microwave-heating device enclosed in an oven.
    This device consisted of two microwave-generating magnetron tubes packed in a metallic box. The oven included a timer and a means of controlling power.
  • Raytheon built the "Radarange"

    Raytheon built the "Radarange"

    a freestanding white-enamel unit
    operating at 220 volts of electricity
    an internal water-cooling system
    1.8 metres tall, weighed 340 kilograms
    consumed 3 kilowatts
  • The first domestic commercial Radarange

    The first domestic commercial Radarange

    powered by a 1,400-to 1,700-watt magnetron
    was water cooled
    required plumbing connections
  • Domestic Microwaves

    Domestic Microwaves

    a magnetron requiring less power
    a cabinet with an air-cooled system
    , the magnetron and related components, were relocated behind the oven
  • Litton design

    Litton design

    Designed the microwave, the short, wide shape that is now common.
  • The first home model

    The first home model

  • Microwave market

    Microwave market

    Several other companies joined in the market and almost 25% of American househoulds owns a microwave owen