When was the first alarm clock invented and how did people wake up on time before? 0 7

The first alarm clock can be considered the “fire clock,” created in Ancient China. It operated using a long stick made of resin and sawdust, which was placed horizontally and suspended with a weight on a string. The stick was ignited at one end, and it smoldered slowly. At the right moment, the string would burn through, and the weight would fall with a clattering sound.

In the 4th century BC, the ancient Greek scholar Plato developed a device for gathering students for lectures. This type of clepsydra (water clock) consisted of three vessels connected by tubes. Water from the upper jug flowed into the middle one, and when it filled up, it would spill sharply into the next one. Air displaced from a pipe-like structure embedded in the wall of the lower vessel would escape with a whistle.

Leonardo da Vinci is also credited with creating a mechanism in which water dripped from one vessel to another. When the water level in the second vessel reached a certain mark, it would drop, activating levers that lifted the legs of the sleeper.

The prototype of the modern alarm clock was a device developed in 1787 by American Levi Hutchins. However, this clock could only sound at four o'clock in the morning. It was not until 1847 that French watchmaker Antoine Redier patented a mechanism that could ring at any specified time of day.