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CLAIM ID

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Candle clocks were used as an alarm by pushing a nail at the desired time length in the candle, and when it melts, the nail used to fall and clank on the metal as an alert.

Report from National Institute of Standards and Technology confirms that candle clocks were used as an alarm clock by using nails.

Report from National Institute of Standards and Technology confirms that candle clocks were used as an alarm clock by using nails.The candle clocks were used by ancient people in determining the accurate time using Natural phenomena. A thin candle was used which had consistently spaced markings and had numbers on the side, that when burned, indicated the passage of periods of time. The candle clock was also improvised and used as an alarm clock where the nail would be sticking to the candle at the mark indicating the time, and when the wax surrounding the nail melted, the nail clattered onto the plate below and made the noise indicating an alarm ringing. Even though there is no concrete evidence to show since when this method was used, its first reference was mentioned in a Chinese poem from around 520 A.D.

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