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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.
In 1937 W.B. Schulte, [2] McGall's employer, started the company MICRO SWITCH. The company and the Micro Switch trademark have been owned by Honeywell Sensing and Control since 1950. [3] The name has become a generic trademark for any snap-action switch. Companies other than Honeywell now manufacture miniature snap-action switches.
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.
Audichron was a talking clock, or a time announcer which was developed and produced by the Audichron Company, starting in the 1930s.There were several types of Audichron machines including the stand time piece (STM), M12, temperature machine (TEMP) and the Comparator.
There may also be instruments and controls for the supply of electricity to the switchboard. For example, a switchboard for a bank of electrical generators, especially frequency would have control of AC power and load sharing, and instruments for frequency, voltage, current, and energy, with perhaps a synchroscope. A main switchboard is a large ...
Typical UK pneumatic delay pushbutton switch. A staircase timer is an electrical switch used to control lighting on a staircase, corridor or lobby. A single action turns on the lights and they remain on for long enough to ascend or descend the stairs. The lights then turn themselves off automatically.