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1888 Geared Facile Bicycle in the Coventry Transport Museum A chain-drive and rear gear hub A bicycle gearbox with chain tensioner A penny-farthing with direct-drive. A cyclist's legs produce power optimally within a narrow pedalling speed range. Gearing is optimized to use this narrow range as best as possible.
Chain tensioner on a single-speed bicycle Belt tensioner on a belt-drive bicycle Hydraulic bolt tensioner Hydraulic Puller-tensioner . A tensioner is a device that applies a force to create or maintain tension. The force may be applied parallel to, as in the case of a hydraulic bolt tensioner, or perpendicular to, as in the case of a spring ...
An introduction video on DMRG for ab initio quantum chemistry. White, Steven R.; Huse, David A. (1993-08-01). "Numerical renormalization-group study of low-lying eigenstates of the antiferromagnetic S=1 Heisenberg chain".
Sometimes the rear derailleurs are re-purposed as chain tensioners for single-speed bicycles that cannot adjust chain tension by a different method. Although variations exist, most rear derailleurs have several components in common. They have a cage that holds two pulleys that guide the chain in an S-shaped pattern.
The Flying Pigeon PA-02, a single-speed utility bicycle, is the most produced bicycle model in history. A single-speed bicycle is a type of bicycle with a single gear ratio. These bicycles are without derailleur gears, hub gearing or other methods for varying the gear ratio of the bicycle.
Roller chain and sprocket The sketch of roller chain, Leonardo da Vinci, Codex Atlanticus. Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles.
STS-88_EVA_1_video_highlights.ogv (Ogg multiplexed audio/video file, Theora/Vorbis, length 4 min 59 s, 320 × 240 pixels, 70 kbps overall, file size: 2.5 MB) This is a file from the Wikimedia Commons .
The taut-line hitch is an adjustable loop knot for use on lines under tension.It is useful when the length of a line will need to be periodically adjusted in order to maintain tension.