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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.
Automatic enlarger timer "Switch and exposure meter for B/W and color negatives and slides. Selective or integral exposure measurement using an independent metering head with a silicon optical sensor and converging lens. Three digits, display amber digital. Start button preparation screen. Time step in the time cycle with countdown to zero.
The first known time with an auto timing device in the Olympic Games was in the steeplechase in 1928, won by Toivo Loukola in 9:21.60 (9:21 4/5 official hand time). The device used was the Löbner camera-timer.
A 7 cam 7 contact cam timer. A cam timer or drum sequencer is an electromechanical system for controlling a sequence of events automatically. It resembles a music box with movable pins, controlling electrical switches instead of musical notes.
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).
This automatic feeder can be programmed to feed your finny friends up to four times a day. The moisture-resistant feed hopper ensures that your fish food stays fresh and dry, and it works with ...