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2. Electric clock - Wikipedia

   en.wikipedia.org/wiki/Electric_clock

   These keep time by counting the oscillations of a calibrated tuning fork with a specific frequency. These were only made in battery-powered form. Battery-powered clocks have been made using the schemes above with the obvious exception of a synchronous movement. All battery-powered clocks have been largely replaced by the lower cost quartz movement.

3. 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 ...

4. Casio Wave Ceptor - Wikipedia

   en.wikipedia.org/wiki/Casio_Wave_Ceptor

   These signals transmit the time measured by atomic clocks accurate to one second in millions of years. By synchronizing daily with the signals, the Wave Ceptor watches achieve high accuracy, using a quartz crystal to keep time in the interim. Some radio watches, including some Wave Ceptors, are solar-powered, supported by a rechargeable battery ...

5. Alarm clock - Wikipedia

   en.wikipedia.org/wiki/Alarm_clock

   This is an accepted version of this page This is the latest accepted revision, reviewed on 17 November 2024. Type of clock A traditional wind-up (key-wound), mechanical spring-powered alarm clock An alarm clock or alarm is a clock that is designed to alert an individual or group of people at a specified time. The primary function of these clocks is to awaken people from their night's sleep or ...

6. Bush (brand) - Wikipedia

   en.wikipedia.org/wiki/Bush_(brand)

   Bush is a British consumer electronics brand owned by J Sainsbury plc (Sainsbury's), the parent company of the retailer Argos. [1] The former Bush company is one of the most famous manufacturers of early British radios. The company is now defunct, but the Bush brand name survives as a private label brand for budget electronics.

7. Clock - Wikipedia

   en.wikipedia.org/wiki/Clock

   The electric clock was patented in 1840, and electronic clocks were introduced in the 20th century, becoming widespread with the development of small battery-powered semiconductor devices. The timekeeping element in every modern clock is a harmonic oscillator, a physical object that vibrates or oscillates at a particular frequency. [2]