Pioneer alarm clock is an amazing clock, which can be traced back to Yi Xian (683-727), a monk and inventor in China. [1] The clock tower with outstanding horological mechanism can be traced back to China engineers Zhang Sixun and Su Song in 10 and1/century respectively. [2] The earliest strike 24 hours away from China was the bell tower near the Umayyad Mosque in Damascus, which was beaten for several hours. This was built in 1 154 by Kaysarani, an Arab engineer base. [3] Since14th century, some bell towers in western Europe can also be closed at a fixed time every day. It was first described by Florence writer Dante in 13 19. [4] The most famous original bell tower of Excellence still stands, probably the bell tower of San Kyle in Venetian San Kyle Square. The clock of Saint Mark was assembled by Giancarlo Rainieri, a famous watchmaker from Reggio Emilia, in 1493, and his father Gian Paolo Rainieri built another famous device in 148 1 year. 1497, Simone Campanato created a great clock (per meter hour, diameter 1.27 meters), which is the place to climb the tower or knock, because Mori Yoshiro (2 moles) and two bronze statues (2.60 hours) handle hammers.
The first mechanical alarm clock that can significantly alarm the designated user at any time was made by Taki Ahldin of the Ottoman Empire in resolution 1559. He introduced the alarm clock in this year's book Kawākib base (durriyya sci-fi wadh' base bankāmat base, dawriyya). His alarm clock can be detected at a certain time, which is the means to achieve it. When placing the hook wheel, it is hoped that the alarm will be heard at the specified time and the automatic production equipment will sound. [ 5 ]
Another mechanical alarm clock was made in 1787 by Levi hutchins of New Hampshire, USA. This device only works for himself. However, it only lets him wake up at 4 am to wake up his work. [6] Antoine Redier, a French inventor, was the first patented adjustable mechanical alarm clock in 1847.
Like almost all other consumer goods in the United States, the alarm clock was discontinued in the spring of 1942. As factories, they were converted to war work during World War II, but their first consumer goods resumed civilian production at 1944 1. By that time, there was a serious shortage of alarm clocks designed for the elderly because of the wear or damage of clocks. Workers are late, or completely lose their original war efforts to change key positions because "my alarm clock is broken." Before OIOS arranged centralized price management and allowed the company to start producing new watches and clocks within a few hours, some of them were pre-war continuation designs and some were new designs, thus becoming the first batch of "post-war" consumer goods, and the war was even over. The first radio with an alarm clock was also invented by James F Reynolds in the 1940s. The price of these "emergency" clocks However, the price management of the office is still strictly controlled.
Modern digital alarm clock function is usually a radio alarm clock function and/or a beep or buzzer alarm clock, which allows to wake up sleeping music or broadcast news instead of harsh noise. Most also provide a "snooze button", a big button, stop the alarm at the top and make sure it rings again after a short time, the most common is 9 minutes [7]. Some alarm clocks also have a "Sleep" button to set the time required by the radio station (usually around 1 hour). This is very useful for people who want to fall asleep on the radio.
Digital clock radios usually use spare batteries to keep time in case of power failure. Without this function, the digital clock will reset its error power when it is restored, usually starting at midnight, which makes it impossible to trigger the alarm clock.