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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. [1]
A nightlight is a small light fixture, usually electrical, placed for comfort or convenience in dark areas or areas that may become dark at certain times, such as at night or during an emergency. Small long-burning candles serving a similar function are referred to as " tealights ".
Cycle lengths of signalized intersections are determined by small gears that are located within dial timers. Cycle gears, as they are commonly known, range from 35 seconds to 120 seconds. [citation needed] If a cycle gear in a dial timer results in a failure, it can be replaced with another cycle gear that would be appropriate to use. Since a ...
At night a red light would command "Stop" and a green light would mean use "Caution". [3] Although it was said to be successful at controlling traffic, its operational life was brief. It exploded on 2 January 1869 as a result of a leak in one of the gas lines underneath the pavement [ 8 ] and injured the policeman who was operating it.
Lighting control systems serve to provide the right amount of light where and when it is needed. [ 1 ] Lighting control systems are employed to maximize the energy savings from the lighting system, satisfy building codes , or comply with green building and energy conservation programs.
A traffic light with a timer in Tehran, Iran. The timing of the intergreen is usually based on the size of the intersection, which can range from two to five seconds. [citation needed] Modelling programs include the ability to calculate intergreen times automatically. Intergreen periods are determined by calculating the path distance for every ...
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