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  2. Panel switch - Wikipedia

    en.wikipedia.org/wiki/Panel_switch

    Panel switch district selector frame at the Connections Museum in Seattle. The Panel Machine Switching System is a type of automatic telephone exchange for urban service that was used in the Bell System in the United States for seven decades.

  3. Tap changer - Wikipedia

    en.wikipedia.org/wiki/Tap_changer

    Alternatively, in some systems, the process of tap changing may be assisted using a rotary or slider switch. No-load tap changers are also employed in high-voltage distribution-type transformers in which the system includes a no-load tap changer on the primary winding to accommodate transmission system variations within a narrow band around the ...

  4. Stepping switch - Wikipedia

    en.wikipedia.org/wiki/Stepping_switch

    In electrical engineering, a stepping switch or stepping relay, also known as a uniselector, is an electromechanical device that switches an input signal path to one of several possible output paths, directed by a train of electrical pulses. The major use of stepping switches was in early automatic telephone exchanges to route telephone calls ...

  5. Switch - Wikipedia

    en.wikipedia.org/wiki/Switch

    Switches can be designed to respond to any type of mechanical stimulus: for example, vibration (the trembler switch), tilt, air pressure, fluid level (a float switch), the turning of a key , linear or rotary movement (a limit switch or microswitch), or presence of a magnetic field (the reed switch). Many switches are operated automatically by ...

  6. Rotary switch - Wikipedia

    en.wikipedia.org/wiki/Rotary_switch

    A rotary switch is a switch operated by rotation. These are often chosen when more than 2 positions are needed, such as a three-speed fan or a CB radio with multiple frequencies of reception or "channels". A rotary switch consists of a spindle or "rotor" that has a contact arm or "spoke" which projects from its surface like a cam.

  7. Selector - Wikipedia

    en.wikipedia.org/wiki/Selector

    Selector, electrical or mechanical component, a switch; Selector, music scheduling software for radio stations created by Radio Computing Services; Selector, of music, otherwise known as a disc jockey; Selector, a person who made a selection of crown land in some Australian colonies; Selector (sport), person that chooses players for a sports team