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Ross began making bicycles in 1946, [23] and by the late 1960s, manufactured about 1 million bicycles per year. [3] By 1985, it had sold 10 million bicycles. The company, still known as Chain Bicycle Corporation, marketed bikes under the Ross brand, [6] including children's, BMX, touring, cruiser, mountain, racing, wheelie, and stationary exercise bicycles.
Top view of a segment from a "bar-link" bicycle chain. Bicycle chain of the bar-link or block chain type on safety bicycle in a vintage (c1900) photograph. A bar-link chain, also called a block-and-bar chain or a block chain, is a mechanical drive chain. It is composed of side plates, where each plate straddles one end of a block and is ...
The chain is still used in agriculture: measuring wheels with a circumference of 0.1 chain (diameter ≈ 2.1 ft or 64 cm) are still readily available in Canada and the United States. For a rectangular tract, multiplying the number of turns of a chain wheel for each of two adjacent sides and dividing by 1,000 gives the area in acres.
In this assembly, the outside plate with the two pins protruding from it are spaced at the same pitch as the chain at 12.7 mm (0.50 in), and the free ends of the pins are grooved. The other plate fits over the ends of the pins and is secured with a spring clip to make the connection, and this type of master link comes closest to being re-usable.
The chain in use on modern bicycles has a 1 ⁄ 2 inch (12.7 mm) pitch, which is the distance from one pin center to another, ANSI standard #40, where the 4 in "#40" indicates the pitch of the chain in eighths of an inch; and ISO standard 606 (metric) #8, where the 8 indicates the pitch in sixteenths of an inch.
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.
Nexus 4 Speed 4 184% 1st gear City Shimano Nexus Inter-3: 3 187% 2nd gear 1220 g City SRAM Spectro E12 (Elan) 1995 1999 12 339% 3500-4000 g City SRAM i-Motion 9: 2005 2012 9 340% 2000g (w/o brake)-2400g (with coaster brake) City SRAM G8: 2012 2015 8 260% 2088-2180 g [16] [17] City SRAM G9 2014 2015 9 292% 2088 g [17] City, Sport SRAM (Sachs)
Although the device did not transmit power continuously since the chains "did not transmit power from shaft to shaft, and hence they were not in the direct line of ancestry of the chain-drive proper", [4] the Greek design marks the beginning of the history of the chain drive since "no earlier instance of such a cam is known, and none as complex ...