An alarm clock is a clock designed to alert a person or group of people at a specified time, most often to wake them from sleep, and most alarm clocks signal through sound, though some instead use light or vibration, with some models using sensors to avoid waking a sleeper who is in a deep stage of sleep. Many alarm clocks include radio receivers that can be set to start playing at a chosen time, known as clock radios, and modern televisions, computers, mobile phones and digital watches now commonly include their own alarm functions as well. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/
Facts
SignificanceThe alarm clock let individuals set a precise waking time in advance rather than rely on someone else, making it possible to coordinate a household or a workforce around a shared schedule. 1 FAQs
What was unusual about the first American alarm clock?
It rang a bell every morning at 4 a.m.
Levi Hutchins, an American clockmaker living in Concord, New Hampshire, built one of the first relatively affordable alarm clocks in 1787. His wooden, cabinet-style clock was engineered to ring a bell every morning at precisely 4 a.m., which was his preferred wake-up time.
Who filed the first patent for an alarm clock?
Antoine Redier is credited with the first patent in 1847.
History.com credits a French clockmaker named Antoine Redier with filing the first patent for an alarm clock in 1847.
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Source Alarm clock (Wikipedia)
Sources
1. Alarm clock (Wikipedia)
Wikimedia FoundationHistory section, first American alarm clock sentence
The first American alarm clock was created in 1787 by Levi Hutchins in Concord, New Hampshire.
Lead paragraph, first sentence
An alarm clock or alarm is a clock that is designed to alert an individual or group of people at a specified time.
In Field: Mechanical Engineering, Lead section
An alarm clock or alarm is a clock that is designed to alert an individual or group of people at a specified time.
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