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A time switch (also called a timer switch, or simply timer) is a device that operates an electric switch controlled by a timer. Intermatic introduced its first time switch in 1945, which was used for "electric signs, store window lighting, apartment hall lights, stokers, and oil and gas burners." A consumer version was added in 1952.
Audichron was a talking clock, or a time announcer which was developed and produced by the Audichron Company, starting in the 1930s.There were several types of Audichron machines including the stand time piece (STM), M12, temperature machine (TEMP) and the Comparator.
As of 2019, an autonomous light-powered high-accuracy quartz watch movement became commercially available which is claimed to be accurate to ± 1 second per year. [ 19 ] [ 20 ] Key elements to obtain the high claimed accuracy are applying an unusually shaped (for a watch) ( AT-cut ) quartz crystal operated at 2 23 or 8 388 608 Hz frequency ...
One of Alexander Bain's early electromagnetic clocks, from the 1840s Gents' of Leicester Pulsynetic, C40A, Waiting Train, Turret Clock (1940s/50?). Photographed in the Ministers' Building (The Secretariat), Yangon.
A typical kitchen timer. A timer or countdown timer is a type of clock that starts from a specified time duration and stops upon reaching 00:00. An example of a simple timer is an hourglass. Commonly, a timer triggers an alarm when it ends. A timer can be implemented through hardware or software.
Typical UK pneumatic delay pushbutton switch. A staircase timer is an electrical switch used to control lighting on a staircase, corridor or lobby.A single action turns on the lights and they remain on for long enough to ascend or descend the stairs.