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Q.

Who invented the alarm clock ?

Asked by ANURADHA PATHAKJ, 14 Dec '08 10:18 am
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Answers (8)

 
1.

The first mechanical clocks were made in the 14th century, and were large monumental clocks. Household clocks were in use by 1620 and some of them had alarm mechanisms. The alarm is simple in concept, typically having a cam that rotates every 12 hours. It has a notch into which a lever can fall, releasing a train of gears that drives a hammer, which repeatedly hits a bell until it runs down or is shut off (many alarms have no shutoff control).

The earliest alarm clock I found reference to is a German iron wall clock with a bronze bell, probably made in Nuremberg in the 15th century. This clock is 19 inches tall and of open framework construction. It needed to hang high on the wall to make room for the driving weight to fall. Other alarm clocks from the 1500's are in existence. See The Clockwork Universe, German Clocks and Automata 1550 - 1650, Maurice and Mayr, 1980, Smithsonian, Neale Watson Academic Publications, New York.

The book Early English Clocks by Dawson, Drover and Par ...more
Answered by Jack Johnson, 15 Dec '08 10:20 am

 
  
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2.

Levi Hutchins
Answered by Anil K Chugh, 15 Dec '08 05:11 pm

 
  
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3.

Levi Hutchins
Answered by Motu, 22 Oct 11:20 am

 
  
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4.

Levi Hutchins
Answered by shaurya, 28 Mar '13 08:53 am

 
  
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5.

Levi Hutchins
Answered by sumati gayki, 29 Oct '09 10:22 am

 
  
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6.

Levi Hutchins
Answered by Dinesh C S, 10 Feb '09 10:08 am

 
  
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7.

Levi Hutchins
Answered by bhaskar erram, 14 Dec '08 10:20 am

 
  
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8.

It has been said that Levi Hutchins of Concord, New Hampshire invented the first alarm clock in 1787 [web]
Answered by magi, 14 Dec '08 10:19 am

 
  
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