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The binary cam is a design for the pulley system of a compound bow. Craig Yehle, director of research and development at Bowtech Archery, received a patent [1] for the design on December 11, 2007. Bowtech started equipping its bows with the new cam design in the 2005 model year. [2] [3]
Novice archers will typically shoot a soft cam whereas a more advanced archer may choose to use a harder cam to gain speed. Bows can be had with a variety of cams, in a full spectrum from soft to hard. Some pulley systems use a single cam at the bottom of the bow and a round idler wheel at the top of the bow instead of two identical cams.
Hoyt Archery is an American manufacturer of recurve and compound bows located in Salt Lake City, Utah. [1] Most notable for their competition recurve bows, which are featured prominently in the Olympics; every gold medalist in individual archery at the 2012 Summer Olympics shot a Hoyt recurve. [2]
The company was started by James Douglas "Doug" Easton (1907–1972), who had made bows and arrows since 1922, and who in 1932 opened Easton's Archery Shop in Los Angeles. After the creation of the manufacturing company in 1953, Easton grew to become the world's leading archery business and pioneered the use of aluminum in sporting goods.
A self bow or simple bow is a bow made from a single piece of wood. Extra material such as horn nocks on the ends, or built-up handles, would normally be accepted as part of a self bow. Some modern authorities would also accept a bow spliced together in the handle from two pieces of wood. [1]
This limb stiffness makes the compound bow more energy-efficient than other bows, in conjunction with the pulley/cams. The typical compound bow has its string applied to pulleys (cams), and one or both of the pulleys have one or more cables attached to the opposite limb. When the string is drawn back, the string causes the pulleys to turn.
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Berimbau is an adaptation of African gourde musical bows, as no Indigenous Brazilian or European people use musical bows. [2] [6] According to the musicologist Gerard Kubik, the berimbau and the "southwest Angolan variety called mbulumbumba are identical in construction and playing technique, as well as in tuning and in a number of basic ...