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2. Telechron - Wikipedia

   en.wikipedia.org/wiki/Telechron

   Telechron electric alarm clock. Telechron alarm clocks are particularly popular with collectors. Until about 1940, the overwhelming majority of Telechron alarm clocks had bell alarms. The entire mechanism was enclosed in a bell housing of steel. Atop the clock's coil was a metal strip that vibrated at 60 cycles per second when the alarm was ...

3. The Best Alarm Clocks That’ll Wake up the Deepest of Sleepers

   www.aol.com/best-alarm-clocks-ll-wake-185900332.html

   This alarm clock is innovative and really goes the extra mile to make your wake-up calls that much more gentle. As opposed to hearing a blasting loud alarm, this watch will lightly zap your wrist ...

4. Radium dial - Wikipedia

   en.wikipedia.org/wiki/Radium_dial

   November 1917 ad for an Ingersoll "Radiolite" watch, one of the first watches mass marketed in the USA featuring a radium-illuminated dial. Radium was discovered by Marie and Pierre Curie in 1898 [1] and was soon combined with paint to make luminescent paint, which was applied to clocks, airplane instruments, and the like, to be able to read them in the dark.

5. Alarm device - Wikipedia

   en.wikipedia.org/wiki/Alarm_device

   There are many kinds of alarm devices. The most common types include: an alarm clock that sounds an alarm at a pre-set time, often used to wake a person up or remind them of an event. a fire alarm which is used to give occupants of a building early warning of a potential fire and give them time to evacuate.

6. History of timekeeping devices - Wikipedia

   en.wikipedia.org/wiki/History_of_timekeeping_devices

   The 12th-century Jayrun Water Clock at the Umayyad Mosque in Damascus was constructed by Muhammad al-Sa'ati, and was later described by his son Ridwan ibn al-Sa'ati in his On the Construction of Clocks and their Use (1203). [45] A sophisticated water-powered astronomical clock was described by Al-Jazari in his treatise on machines, written in ...

7. Lighthouse clock - Wikipedia

   en.wikipedia.org/wiki/Lighthouse_Clock

   Lighthouse clocks are regarded as the first alarm clocks produced in America, although a significant number of the later clocks of this type were crafted without alarms. [1] The clock consist of a round, square or octagonal wooden base that rises in a tapered column, which is itself surmounted by clockworks that are covered by a glass dome ...