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Washing machine

technology Maturity 7-9 Next article →

A washing machine is a specialized appliance designed to launder clothing. Most modern machines utilize water and laundry detergent to remove dirt. Detergent is available in liquid, powder, or dehydrated sheet forms. These machines serve both private homes and commercial laundromats. In a laundromat, customers typically pay a fee for each use.

Laundromat ontario
Laundromat ontario

The invention of the washing machine is considered a major social milestone. Some historians compare its impact to the refrigerator or the contraceptive pill. Irish feminist Mary Frances McDonald called it the most life-changing invention for women. Swedish statistician Hans Rosling even called it the greatest invention of the Industrial Revolution.

Before modern plumbing and appliances, laundry was a laborious, multi-step process. People had to manually carry water from a spring, well, or pump. This water was heated over an open fire and poured into tubs. Because water was limited, people reused it by washing the least soiled clothes first. The process involved soaking, beating, scrubbing, and rinsing textiles by hand. To remove water, people formed wet clothes into rolls and twisted them.

Fulling mill bockler
Fulling mill bockler

This entire cycle, including drying and ironing, often occupied a full day of work.

Early mechanical washing began with practices like fulling. In a fulling mill, wooden hammers called fulling stocks beat the cloth.

Fulling mill bockler
Fulling mill bockler

Later, inventors created enclosed basins with grooves, fingers, or paddles. Users would use a stick to agitate the clothes against these textured sides. This hand-powered agitation was more effective than scrubbing by hand alone. Eventually, the rotating drum design emerged as a major milestone. These early drums were made of wood and required a person to turn a hand-crank. As metal replaced wood, drums could be placed over fires to heat the water.

The history of washing machine patents spans several centuries. The first English patent for a washing machine was issued in 1691. In 1797, Nathaniel Briggs received the first United States patent for "Clothes Washing." By the nineteenth century, steam power was integrated into many designs. In 1862, Richard Lansdale demonstrated a compound rotary machine with wringing rollers. Canadian inventor John E. Turnbull patented a washer with wringer rolls in 1843. During the 1850s, the Shaker community also contributed to the technology through inventors like Nicholas Bennett and David Parker.

Electricity changed how machines functioned and how many people owned them. Electric washing machines were being discussed in newspapers as early as 1904. In the United States, sales of electric units reached 800,000 by 1928. However, the Great Depression caused sales to drop to 600,000 units by 1932. By 1940, 60% of the 25,000,000 electrically wired homes in the U.S. owned a washer.

Electric Rotor Washer
Electric Rotor Washer

During World War II, domestic production in the U.S. was suspended to manufacture war materiel. This period allowed manufacturers to research and develop the automatic machines that would define the future.

The first domestic automatic washing machine was introduced by Bendix Home Appliances in 1937.

Waschvollautomat Constructa 1950er
Waschvollautomat Constructa 1950er

This machine looked similar to modern front-loading models. It used a heavy-duty two-speed gearbox to change drum speeds, much like a car's transmission. Early automatic models often used temporary slip-on connectors for sink taps. Today, most machines use permanent hot and cold water connections. Many modern European front-loading machines use a "cold fill" method. These machines rely on internal electric heaters to raise the water temperature.

Modern machines rely on electromechanical timers to sequence the wash and extraction process.

These timers use a series of cams on a common shaft. A small electric motor drives the shaft through a reduction gearbox. As the motor runs, the cams hit switches to start or stop parts like the drain pump. In 1957, engineers Winston L. Shelton and Gresham N. Jennings patented an early version of this device. Some older machines also used a "Keymatic" system. This used plastic cartridges with specific slots to program different wash cycles.

Hoover 0307 pulsator washing machine (1)
Hoover 0307 pulsator washing machine (1)
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File:LG 드럼세탁기와 식기세척기, 영국서 물사용 효율 최우수 제품 수상.jpg
LG 드럼세탁기와 식기세척기, 영국서 물사용 효율 최우수 제품 수상.jpg
Rhof-histWaschmaschine.ogv
Wringer washer.webm
File:Fulling mill bockler.jpg
Fulling mill bockler.jpg
File:Electric Rotor Washer.JPG
Electric Rotor Washer.JPG
File:Mineral Wells May 2017 22 (The Laumdronat and Washing Machine Museum interior).jpg
Mineral Wells May 2017 22 (The Laumdronat...
File:Заливная и сливная арматура стиралки-автомата.jpg
Заливная и сливная арматура стиралки-автомата.jpg
File:Hoover 0307 pulsator washing machine (1).jpg
Hoover 0307 pulsator washing machine (1).jpg
File:Waschvollautomat Constructa 1950er.jpg
Waschvollautomat Constructa 1950er.jpg
File:IFA 2010 Internationale Funkausstellung Berlin 111.JPG
IFA 2010 Internationale Funkausstellung...
File:Washing Machine Beko.jpg
Washing Machine Beko.jpg
File:GE 2 Speed Commercial Washers.JPG
GE 2 Speed Commercial Washers.JPG

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