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A microwave oven or simply microwave is an electric oven that heats and cooks food by exposing it to electromagnetic radiation in the microwave frequency range. [1] This induces polar molecules in the food to rotate and produce thermal energy in a process known as dielectric heating .
During a normal cycle, most Whirlpool-built wig-wag equipped washers will fill, start the motor, then engage the wash solenoid. Upon completion of the wash mode, the wash (agitate) solenoid will be turned off, which will allow the pump to drain the tub. After a minute or two, the timer will then engage the spin wig-wag which will cause the ...
The first upright vacuum cleaner was invented in June 1908 in North Canton, Ohio, by department store janitor and occasional inventor James Murray Spangler.Spangler was an asthmatic, and suspecting the carpet sweeper he was using at work was the cause of his ailment, he created a basic suction-sweeper by mounting an electric fan motor on a carpet sweeper and then adding a soap box and a broom ...
Hamilton Beach Brands Holding Company is an American designer, marketer and distributor of home appliances and commercial restaurant equipment marketed primarily in the United States, Canada, and Mexico, including blenders, mixers, toasters, slow cookers, clothes irons, and air purifiers.
In 1945 Percy Spencer, an engineer working on radar at Raytheon, noticed that microwave radiation from a magnetron oscillator melted a candy bar in his pocket. He investigated cooking with microwaves and invented the microwave oven , consisting of a magnetron feeding microwaves into a closed metal cavity containing food, which was patented by ...
At microwave frequencies, this material is usually a ferrite which is biased by a static magnetic field [1] but can be a self-biased material. [2] The ferrite is positioned within the isolator such that the microwave signal presents it with a rotating magnetic field, with the rotation axis aligned with the direction of the static bias field.
A High-volume low-speed fan. A high-volume low-speed (HVLS) fan is a type of mechanical fan greater than 7 feet (2.1 m) in diameter. [1] HVLS fans are generally ceiling fans although some are pole mounted. HVLS fans move slowly and distribute large amounts of air at low rotational speed– hence the name "high volume, low speed."
A convection oven (also known as a fan-assisted oven, turbo broiler or simply a fan oven or turbo) is an oven that has fans to circulate air around food [1] to create an evenly heated environment. In an oven without a fan, natural convection circulates hot air unevenly, so that it will be cooler at the bottom and hotter at the top than in the ...