signaling device

Definitions of signaling device
  1. noun
    a device used to send signals
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    examples:
    Liberty Bell
    the bell of Independence Hall; rung 8 July 1776 to announce the signing of the Declaration of Independence
    types:
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    bell
    a hollow device made of metal that makes a ringing sound when struck
    buzzer
    a signaling device that makes a buzzing sound
    foghorn
    a warning device consisting of a horn that generates a loud low tone
    whistle
    acoustic device that forces air or steam against an edge or into a cavity and so produces a loud shrill sound
    boat whistle
    a whistle on a boat that is sounded as a warning
    church bell
    a bell in a church tower (usually sounded to summon people to church)
    cowbell
    a bell hung around the neck of cow so that the cow can be easily located
    death bell, death knell
    a bell rung to announce a death
    diaphone
    a foghorn that makes a signal consisting of two tones
    dinner bell
    a bell rung to announce that dinner has been served
    electric bell
    a bell activated by the magnetic effect of an electric current
    factory whistle
    a whistle at a factory that is sounded to announce times for starting or stopping work
    fire bell
    a bell rung to give a fire alarm
    school bell
    a bell rung to announce beginning or ending of class
    sheep bell
    a bell hung round the neck of a sheep so that the sheep can be easily located
    shop bell
    a bell attached to the door of a small shop; warns the proprietor that a customer has entered the shop
    cascabel, sleigh bell
    a bell attached to a sleigh, or to the harness of a horse that is pulling a sleigh
    steam whistle
    a whistle in which the sound is produced by steam; usually attached to a steam boiler
    tocsin, warning bell
    a bell used to sound an alarm
    type of:
    device
    an instrumentality invented for a particular purpose
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