出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2012/12/26 14:15:48」(JST)
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A kettle, sometimes called a tea kettle or teakettle, is a type of pot, typically metal, specialized for boiling water over a heat source, with a lid, spout and handle, or a small kitchen appliance of similar shape that functions in a self-contained manner. Kettles can be heated either by placing on a stove, or by their own internal electric heating element in the appliance versions.
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A stovetop kettle is a roughly pitcher shaped metal vessel used to heat water on a stovetop or hob. Kettles usually have a handle on top, a spout, and a lid. Sometimes stove-mounted kettles also have a steam whistle which indicates when the water has reached boiling point. In whistling tea kettles, when the steam build up in the container of the kettle tries to escape, it causes vibrations to occur within the chamber. As the speed of the releasing steam increases, the vibrations become louder, causing a whistle.
The most popular of stovetop kettles are made with stainless steel. This is due to the lightweight nature of the kettle, in addition to the bright finish and durability. The crack-resistant nature of the kettle also makes it easier to clean. Kettles can also be made from copper, iron, aluminum, polished chrome or ceramic.
Electric kettles are normally constructed of durable plastic or steel (with a plastic handle) and powered by mains electricity. In modern designs, once the water has reached boiling, the kettle automatically deactivates, preventing the water from boiling away and damaging the heating element. Electric kettles were introduced as means to boil water without the necessity of a stove top.
In New Zealand and Australia, a kettle is colloquially referred to as a jug.
The first kettles were used in ancient Mesopotamia for purposes other than cooking. Over time these artistically decorated earthenware containers became more frequently utilized in the kitchen. In China, kettles were typically made of iron and were placed directly over an open flame. Travelers used the kettles to boil fresh water to make it suitable for drinking.
The word kettle originates from Old Norse ketill "cauldron". The Old English spelling was ċetel with initial che- [tʃ] like 'cherry', Middle English (and dialectal) was chetel, both come (together with German Kessel "cauldron") ultimately from Germanic *katilaz, that was borrowed from Latin catillus, diminutive form of catīnus "deep vessel for serving or cooking food",[1] which in various contexts is translated as "bowl", "deep dish", or "funnel".
The development of tea kettles was in direct correlation with the evolution of the modern stove.[2]
In the latter part of the 1800s, with the height of the industrial revolution, electric tea kettles were introduced as an alternative to stove top kettles. The first electric kettles had a warming chamber outside of the water source; but this was soon adapted in favor of an internal warming apparatus.
Modern tea kettles include a variety of technological advancements. Some electric kettles are cordless with illumination capabilities. Whistling kettles are equipped with lightweight dynamics and heat-resistant handles.
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