Who invented the alarm clock?

The first mechanical alarm clock was invented by Levi Hutchins, of New Hampshire, in the United States, in 1787. This device he made only for himself however, and it only rang at 4 AM, in order to wake him for his job. The French inventor Antoine Redier was the first to patent an adjustable mechanical alarm clock, in 1847.

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First answer by Viper1usmc. Last edit by Viper1usmc. Contributor trust: 1779 [recommend contributor]. Question popularity: 8 [recommend question]