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Posted by Carlos on 7/12/2013 to Alarm Clocks
An alarm clock uses a standard dial, or buttons, to set the targeted time, and will emit the according stimulus to awaken the user. To stop the sound, users must press either a button or handle. Many clocks will cease emitting noise and light if left unattended for long periods of time, and many clocks include a “snooze” function, which allows users to wake up gradually to intermittent alarms. Many traditional alarm clocks have several bells, that ring through a mainspring. The mainspring propels a gear that knocks a hammer back and forth between these bells, creating a ring. Other alarm clocks utilize electric noises preloaded into a digital circuit.
Alarm clocks appear in various shapes and designs, and utilize different methods to awaken the user. While some use a piercing sound, to shock the user out of sleep, others feature calming sounds—like running water, or bird noises. Many modern alarm clocks make use of clock radios, and some include iPod adapters. While many adaptations of the alarm clock exist, their function remains constant. Alarm clocks have served sleepers for many years, ensuring they awaken at a predetermined time.