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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.
A solar dial is a type of time switch used primarily for controlling lighting. [ 1 ] The benefit of a solar dial over a conventional 'on-off' time switch is the ability to 'track' the sunrise and sunset times for a particular latitude (which is specified when the unit is purchased).
Reliance Automatic Lighting Company was organized in Warren, Ohio, in 1909 before moving to Racine in 1911.It was owned and operated by Benjamin F. Flegel and manufactured automatic time switches (clock apparatus for turning lights on and off at prearranged times).
To provide longer lighting times when required the button may be pressed repeatedly. For this reason any timer should be a retriggerable monostable, i.e. the off delay lasts from the time of the last button press. There may also be a switch, sometimes a key switch, that can turn the lights on indefinitely for tasks such as cleaning.
The timing functions are traditionally controlled by two buttons on the case. Pressing the top button starts the timer running, and pressing the button a second time stops it, leaving the elapsed time displayed. A press of the second button then resets the stopwatch to zero. The second button is also used to record split times or lap times ...
The term lighting control system refers to an intelligent networked system of devices related to lighting control. These devices may include relays, occupancy sensors, photocells, light control switches or touchscreens, and signals from other building systems (such as fire alarm or HVAC). Adjustment of the system occurs both at device locations ...
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