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Call change ringing is a branch of the art of change ringing, in which a group of English-style full-circle bell ringers are instructed continually to create different sequences, or changes, of the bells' striking order. Each command from the leader or "conductor" of the ringing results in a new sequence of sounding the bells.
Methods of change ringing are named for the number of working bells, or the bells that switch order within the change. It takes a pair to switch, and commonly the largest bell (the tenor) does not change place. For example, there may be six bells, only five of which work, allowing for only two pairs.
A bell character (sometimes bell code) is a device control code originally sent to ring a small electromechanical bell on tickers and other teleprinters and teletypewriters to alert operators at the other end of the line, often of an incoming message.
Method ringing (also known as scientific ringing) is a form of change ringing in which the ringers commit to memory the rules for generating each change of sequence, and pairs of bells are affected. This creates a form of bell music which is continually changing, but which cannot be discerned as a conventional melody.
The most common use of software in change ringing is composition proving. This type of software is used to take the tedium out of proving change ringing compositions: that is, checking that no change within the composition is repeated. The software will perform the checks required to prove a composition in milliseconds, rather than the hours or ...
The North American Guild of Change Ringers (NAGCR) was founded in 1972 after the hanging of a ring of bells in the Washington National Cathedral in Washington, D.C., United States, in 1964. The NAGCR has now grown and expanded to 52 bell towers across the United States (44 towers) and Canada (8 towers) as well as one mini-ring and 9 hand-bell ...
Change ringing originated following the invention of English full-circle tower bell ringing in the early 17th century, when bell ringers found that swinging a bell through a much larger arc than that required for swing-chiming gave control over the time between successive strikes of the clapper. Ordinarily a bell will swing through a small arc ...
A common application of the 25-pair color code is the cabling for the Registered Jack interface RJ21, which uses a female 50-pin miniature ribbon connector, as shown in the following table. The geometry of the pins of the receptacle (right hand image) corresponds to the pin numbers of the table.