09-26-2003, 04:56 AM
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#2 (permalink)
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Rookie
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from: http://www.charlotte.com/mld/charlotte/news/6573065.htm
Clock experts say when snooze alarms were invented, the gears in alarm clocks were standardized. The snooze gear was introduced into the existing mix and its teeth had to mesh with the other gears' teeth. The engineers had to choose between a gear that made the snooze period nine-plus minutes or 10-plus minutes. Because of the gear configuration, 10 minutes on the nose was not an option.
According to these clock historians, engineers chose the shorter snooze, figuring "less than 10 minutes" seemed more punctual and marketable than sending people back to dreamland for "more than 10 minutes." The public became accustomed to this, and clock makers have generally stuck with it.
But not all snooze alarms buzzed every nine minutes. In 1959, Westclox released "drowse" alarms that could be set for either five or 10 minutes of snooze time. Later Westclox marketed clocks with a seven-minute snooze alarm.
Still, nine minutes is the norm.
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