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A crotalus on display. A crotalus (Spanish: matraca), [1] [2] also known as a crotalum or clapper, is a wooden liturgical rattle or clapper that replaces altar bells during the celebration of the Tridentine Paschal Triduum at the end of Lent in the Catholic Church.
In this case, the bell will catch up with the clapper and if rung to or near full circle will carry the clapper up on the bell's trailing side. Alternatively, the clapper may have a shorter period and catch up with the bell's leading side, travel up with the bell, and come to rest on the downhill side.
The clapper on an English handbell is on a hinge and moves back and forth in a single direction, unlike a school bell in which the clapper swings freely in any direction. It also has a spring that holds the clapper away from the casting after the strike to allow the bell to ring freely.
The bell will eventually stop when the dry piles have distributed their charges equally if the clapper does not wear out first. [5] [6] The Bell has produced approximately 10 billion rings since 1840 and holds the Guinness World Record as "the world's most durable battery [delivering] ceaseless tintinnabulation". [2]
Clapper - the metal (usually cast iron) rod/hammer hung from a pivot below the crown of the bell, that strikes the soundbow of the bell when the bell stops moving. Clocking - causing a bell to sound while down by pulling a hammer against it (as a clock would) or by pulling the clapper against the side of the bell.
The bell is suspended from a headstock which can swing on bearings. A rope is tied to a wheel or lever on the headstock, and hangs down to the bell ringer. To ring the bell, the ringer pulls on the rope, swinging the bell. The motion causes the clapper to strike the inside of the bell rim as it swings, thereby sounding the bell.
A clapper is a basic form of percussion instrument. It consists of two long solid pieces that are struck together producing sound. They exist in many forms in many different cultures around the world. Clappers can take a number of forms and be made of a wide variety of material. Wood is most common, but metal and ivory have also been used.
If the bell is mounted as cast, without any tuning, it is called a "maiden bell". Russian bells are treated in this way and cast for a certain tone. [11] Cutaway drawing of a bell, showing the clapper and interior. The profile of the bell thickness can be seen, and is thickest at soundbow near the bottom (the lip).