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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.
Intermatic Incorporated is an American manufacturer of time switches headquartered in Spring Grove, Illinois. Intermatic was founded in 1891 in Chicago, Illinois as the International Register Company to produce fare registers .
There were red-light and green-light timers, but the latter was taken down due to accidents induced by encouraging drivers to speed up as the green-light timers ended. As for red-light timers, they cannot only inform the time remaining for waiting but also make the drivers focus on their signal instead of the green light in the other direction.
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The major advantage of a lighting control system over stand-alone lighting controls or conventional manual switching is the ability to control individual lights or groups of lights from a single user interface device. This ability to control multiple light sources from a user device allows complex lighting scenes to be created.
These may include sending and receiving instructions via separate data networks, at high frequency over the top of the low voltage supply or wireless. [90] Street light controllers are smarter versions of the mechanical or electronic timers previously used for street light ON-OFF operation.
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