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An adjustable bed is a bed which has a multi-hinged lying surface which can be profiled to a number of different positions. [1] Common adjustments include inclining the upper body and raising the lower body independently of each other.
There are many varieties of beds: An adjustable bed is a bed that can be adjusted to a number of different positions. Most hospital beds are adjustable, so that a patient can have different parts of their body elevated for medical reasons. Some people have adjustable beds in private homes.
In 1874 the mattress company Andrew Wuest and Son, Cincinnati, Ohio, registered a patent for a type of mattress frame with a hinged head that could be elevated, a predecessor of the modern day hospital bed. [4] The modern 3-segment adjustable hospital bed was invented by Willis Dew Gatch (1877-1962), chair of the Department of Surgery at the ...
Studies suggest that adjustable-firmness beds are better for back pain. [26] Adjustable-firmness mattresses for medical use have special control mechanisms. In the 1990s self-adjusting air beds that automatically change their pressure periodically, or inflate and deflate several air chambers alternately, were introduced.
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Most of them were made with automatic controls and adjustable beds (AB). The SP series were mostly hand presses. The SP15 was the most popular of them all. Besides letterpress proof presses, Vandercook also made offset proof presses. The flat bed presses were the model 20-26 (wet) and 15-20 (dry). In 1968, they came out with model RO4-29. [5]
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