The first alarm clock could only ring at 4 a.m.

The first alarm clock could only ring at 4 a.m.

The first American alarm clock was created in 1787 by Levi Hutchins in Concord, New Hampshire. 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.

1870s

In the late 1870s, small alarm clocks gain popularity, and the major US clock companies started making them. The German clock companies followed them. It is essential to note that the predecessor of Westclox was founded in 1885 with a bright and improved method of small clock construction.

To prepare for the stress of waking, your body releases a cocktail of stress hormones, like cortisol. Gradually, your sleep becomes lighter and lighter. And that's why you wake up before your alarm. ... It's so precise that your eyelids open minutes—maybe even seconds—before the alarm goes off.

Though personal alarm clocks were eventually patented in Europe in 1847 (and 1876 in America), they didn't really catch on until later. ... Working in Britain and Ireland as late as the 1970s, these professional human alarm clocks would tap on their customers' bedroom windows until they were positive the person was awake.

If You Have Trouble Waking Up, You Need One Of These Genius Alarm Clocks. ... And since they're dual alarms, you can set them for two different times.

The vibrator is connected to the alarm clock and is also attached to the bed. When the alarm goes off, the bed will shake and wake up the deaf person. ... The vibrator is connected to the alarm clock and is placed under the deaf person's pillow. When the alarm goes off, the pillow will shake and wake the deaf person up