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Elisha Graves Otis (August 3, 1811 – April 8, 1861) was an American industrialist and founder of the Otis Elevator Company. [1] In 1853, he invented a safety device that prevents elevators from falling if the hoisting cable fails.
Brake: devices used to stop or slow down a bicycle. Rim brakes and disc brakes are operated by brake levers, which are mounted on the handlebars. Band brake is an alternative to rim brakes but can only be installed at the rear wheel. Coaster brakes are operated by pedaling backward; Brake lever: a lever for actuating a bicycle brake
Bicycle brakes (4 P) D. Bicycle drivetrains (10 P) G. ... Pages in category "Bicycle parts" The following 83 pages are in this category, out of 83 total.
The spoon brake or plunger brake was probably the first type of bicycle brake and precedes the pneumatic tyre. [7] Spoon brakes were used on penny farthings with solid rubber tyres in the 1800s and continued to be used after the introduction of the pneumatic-tyred safety bicycle. The spoon brake consists of a pad (often leather) or metal shoe ...
Pages in category "Bicycle brakes" The following 4 pages are in this category, out of 4 total. This list may not reflect recent changes. ...
In 1852, Elisha Otis introduced the safety elevator, which prevented the fall of the cab if the cable broke. He demonstrated it at the New York exposition in the Crystal Palace in a dramatic, death-defying presentation in 1854, [ 10 ] [ 11 ] and the first such passenger elevator was installed at 488 Broadway in New York City on 23 March 1857.
Bicycle drivetrain systems are used to transmit power on bicycles, tricycles, quadracycles, unicycles, or other human-powered vehicles from the riders to the drive wheels. Most also include some type of a mechanism to convert speed and torque via gear ratios .
The term 'safety bicycle' was used in the 1880s for any alternative to the penny-farthing. The front and rear wheel were not necessarily the same size. [3] Later historians began to use the term in a more restricted way for the design that was a direct ancestor to most modern bicycles.