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Several manufacturers produced semi-automatic machines, requiring the user to intervene at one or two points in the wash cycle. A common semi-automatic type (available from Hoover in the UK until at least the 1970s) included two tubs: one with an agitator or impeller for washing, plus another smaller tub for water extraction or centrifugal rinsing.
1920 advertisement for the Thor electric washing machine. The Thor washing machine was the first electric clothes washer sold commercially in the United States. Produced by the Chicago-based Hurley Electric Laundry Equipment Company, the 1907 Thor is believed to be the first electrically powered washer ever manufactured, crediting Hurley as the inventor of the first automatic washing machine.
Driver's seat has two steering wheels, left and right, and which wheel to use is driver's choice with effective in man-machine work, R1 machine structure became industrial De facto standard, then in 1974, rather small successor R2 produced suitable for Japanese road conditions. – Saitama Prefecture
Car wash lift, where cars are placed on a lift platform that can be used to wash under the car. Touch-free (or touchless) car washing technology is the modern car wash system that reduces water consumption, chemical solutions, and time. Washing machinery uses high-pressure jets that measure the length and width of the vehicle. [11]
The cam can be seen as a device that converts rotational motion to reciprocating (or sometimes oscillating) motion. [clarification needed] [3] A common example is the camshaft of an automobile, which takes the rotary motion of the engine and converts it into the reciprocating motion necessary to operate the intake and exhaust valves of the cylinders.
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A simple dumbwaiter is a movable frame in a shaft, dropped by a rope on a pulley, guided by rails; most dumbwaiters have a shaft, cart, and capacity smaller than those of passenger elevators, usually 45 to 450 kg (100 to 992 lbs.) [2] Before electric motors were added in the 1920s, dumbwaiters were controlled manually by ropes on pulleys.
However, although the washing of laundry became mechanised and electrified in the twentieth century, even households that can afford electric clothes driers may also use a clothes airer, and its environmentally friendly qualities have led to a resurgence in its popularity, [4] with a number of new manufacturers springing up in recent decades.