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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.
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.
Pencil detonator. An array of World War 2 pencil detonators displayed at the Museum of the British Resistance Organisation at the Parham Airfield Museum, 2007. A pencil detonator or time pencil is a time fuze designed to be connected to a detonator or short length of safety fuse. They are about the same size and shape as a pencil, hence the name.
555 timer IC. The 555 timer IC is an integrated circuit used in a variety of timer, delay, pulse generation, and oscillator applications. It is one of the most popular timing ICs due to its flexibility and price. Derivatives provide two ( 556) or four ( 558) timing circuits in one package. [2]
A timer or countdown timer is a type of clock that starts from a specified time duration and stops when reaching 00:00. A simple timer is an hourglass. Commonly, a timer triggers an alarm when it ends. A timer can be implemented through hardware or software . Stopwatches operate in the opposite direction, upwards from 00:00, measuring elapsed ...
This lists Alcatel switches before the merger with Lucent Technologies . E10A (E10N3)- Original switch introduced in 1972 one of the earliest deployments of TDM switching in the world. E10B (E10N1)- Major revision in the 1980s which eventually saw ISDN capabilities. Common in France, Ireland, China, India and elsewhere.
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