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KF5JRV > TECH 24.08.16 14:00l 16 Lines 663 Bytes #-3512 (0) @ WW
BID : 744_KF5JRV
Read: DK3UZ GUEST OE7FMI
Subj: First Alarm Clock
Path: DB0FHN<DB0PM<OE5XBL<F1OYP<IZ3LSV<I0OJJ<N6RME<CX2SA<N0KFQ<KF5JRV
Sent: 160824/1156Z 744@KF5JRV.#NWAR.AR.USA.NA BPQK1.4.65
First Alarm Clock
The first alarm clock was conceptualized in ancient Greece. It was thought up
by Ctesibus, a Hellenistic engineer and inventor. During those days, time was
usually indicated using a water clock. Ctesibus then used an elaborate system
comprised of dropping pebbles on to a gong to make a sound. This sound was set
to happen at specific time intervals, giving rise to a rather crude yet
effective version of the modern alarm clock.
Plato himself is also credited with creating a version of an alarm clock that
combined water filling up a vessel and making pebbles drop to make a sound.
73, Scott kf5jrv
KF5JRV @ KF5JRV.#NWAR.AR.USA.NA
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