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A shopping cart held by a woman, containing bags and food. A shopping cart (American English), trolley (British English, Australian English), or buggy (Southern American English, Appalachian English), also known by a variety of other names, is a wheeled cart supplied by a shop or store, especially supermarkets, for use by customers inside the premises for transport of merchandise as they move ...
Baggage carts are usually built out of steel and equipped with three or four wheels. For safety reasons, they are generally fitted with a brake. [citation needed] Usually, a handle has to be pushed down in order to move the cart, however, in some cases, such as London airports, the handle activates the brake. Very few carts, e.g. in developing ...
The trolleys commonly have two parallel wheels on a hand truck style frame (with a handle and stand), but some designs have four or six wheels. In some countries the trolleys are traditionally regarded as being used by pensioner-age women, [5] [6] with granny cart being an American slang term for the four-wheeled wire-framed trolleys, [7] [8 ...
The ECU constantly monitors the rotational speed of each wheel; if it detects the wheel rotating significantly slower than the speed of the vehicle, a condition indicative of impending wheel lock, it actuates the valves to reduce hydraulic pressure to the brake at the affected wheel, thus reducing the braking force on that wheel; the wheel then ...
In manual transmission vehicles, the parking brake is engaged to help keep the vehicle stationary while parked, especially if parked on an incline. [2] [3]While automatic transmission vehicles have a "Park" gear with a parking pawl that immobilizes the transmission, it is still recommended to use the parking brake, as the pawl in the gearbox could fail due to stress or another vehicle striking ...
The hub is a component where the wheel is directly mounted to, and is outside the axle. The benefits of unlocking hubs for normal road use are mainly found in increased fuel efficiency . When the front hubs are locked, even if no power is sent to the front axle (by means of a transfer case ), the turning of the wheels will still spin the front ...
On automobiles, disc brakes are often located within the wheel A drilled motorcycle brake disc. The development of disc-type brakes began in England in the 1890s. In 1902, the Lanchester Motor Company designed brakes that looked and operated similarly to a modern disc-brake system even though the disc was thin and a cable activated the brake pad. [4]
Using 26 wheels, each with the letters of the alphabet arranged randomly around them, Thomas Jefferson invented the wheel cypher in 1795. Falling in and out of use and obscurity, the wheel cypher was "re-invented" twice: first by a French government official around 1890, and then just prior to World War I by an officer in the United States Army.