The examples and perspective in this article deal primarily with the United States and do not represent a worldwide view of the subject. Portable cords may be portable h type vacuum in commercial, industrial and residential applications.
A variety of portable cords, differing in styles, lengths, and thicknesses exists in the marketplace. Common types include Type SJT, SVT, SEOW, SJ, SJOW, SJOOW, SO, and SOW, each designed for specific applications. A portable cord is usually made of thermoset polymer, thermoplastic elastomer, or thermoplastic. Don’t Let Your Portable Cord Tie You Up”. The dirt is collected by either a dustbag or a cyclone for later disposal. The name comes from the Hoover Company, one of the first and more influential companies in the development of the device.
The vacuum cleaner evolved from the carpet sweeper via manual vacuum cleaners. The first manual models, using bellows, were developed in the 1860s, and the first motorized designs appeared at the turn of the 20th century, with the first decade being the boom decade. In 1860 a carpet sweeper was invented by Daniel Hess of West Union, Iowa that gathered dust with a rotating brush and a bellows for generating suction. Housemaid using “dedusting pump”, circa 1906.
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The end of the 19th century saw the introduction of powered cleaners, although early types used some variation of blowing air to clean instead of suction. One appeared in 1898 when John S. In 1901 powered vacuum cleaners using suction were invented independently by British engineer Hubert Cecil Booth and American inventor David T. A hand-powered pneumatic vacuum cleaner, circa 1910. The first vacuum-cleaning device to be portable and marketed at the domestic market was built in 1905 by Walter Griffiths, a manufacturer in Birmingham, England. Kirby developed his first of many vacuums called the “Domestic Cyclone”. It used water for dirt separation.
Later revisions came to be known as the Kirby Vacuum Cleaner. In Continental Europe, the Fisker and Nielsen company in Denmark was the first to sell vacuum cleaners in 1910. This section does not cite any sources. For many years after their introduction, vacuum cleaners remained a luxury item, but after the Second World War, they became common among the middle classes. The last decades of the 20th century saw the more widespread use of technologies developed earlier, including filterless cyclonic dirt separation, central vacuum systems and rechargeable hand-held vacuums. In addition, miniaturized computer technology and improved batteries allowed the development of a new type of machine — the autonomous robotic vacuum cleaner.
In 2004 a British company released Airider, a hovering vacuum cleaner that floats on a cushion of air, similar to a hovercraft. Hoover Constellation predated it by at least 35 years. A British inventor has developed a new cleaning technology known as Air Recycling Technology, which, instead of using a vacuum, uses an air stream to collect dust from the carpet. A wide variety of technologies, designs, and configurations are available for both domestic and commercial cleaning jobs. Upright vacuum cleaners are popular in the United States, Britain and numerous Commonwealth countries, but unusual in some Continental European countries. They take the form of a cleaning head, onto which a handle and bag are attached.
The motor is often cooled by a separate cooling fan. Because of their large-bladed fans, and comparatively short airpaths, direct-fan cleaners create a very efficient airflow from a low amount of power, and make effective carpet cleaners. Fan-bypass uprights have their motor mounted after the filter bag. Dust is removed from the airstream by the bag, and usually a filter, before it passes through the fan. The fans are smaller, and are usually a combination of several moving and stationary turbines working in sequence to boost power. The motor is cooled by the airstream passing through it. The most common upright vacuum cleaners use a drive-belt powered by the suction motor to rotate the brush-roll.