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  2. Rotary switch - Wikipedia

    en.wikipedia.org/wiki/Rotary_switch

    Rotary switches were used as channel selectors on television receivers until the early 1970s, as range selectors on electrical metering equipment, as band selectors on multi-band radios, etc. Modern rotary switches use a "star wheel" mechanism to provide the switching positions, such as at every 30, 45, 60, or 90 degrees.

  3. Switch - Wikipedia

    en.wikipedia.org/wiki/Switch

    Rotary switches were used as channel selectors on television receivers until the early 1970s, as range selectors on electrical metering equipment, as band selectors on multi-band radios and other similar purposes. In industry, rotary switches are used for control of measuring instruments, switchgear, or in control circuits.

  4. Stepping switch - Wikipedia

    en.wikipedia.org/wiki/Stepping_switch

    Stepping switches were widely used in telephony and industrial control systems when electromechanical technology was paramount. A basic stepping switch is an electrically operated rotary switch with a single (typically input) terminal, and multiple (typically output) terminals. Like other typical rotary switches, the single terminal connects to ...

  5. Commutator (electric) - Wikipedia

    en.wikipedia.org/wiki/Commutator_(electric)

    A commutator is a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. It consists of a cylinder composed of multiple metal contact segments on the rotating armature of the machine.

  6. Strowger switch - Wikipedia

    en.wikipedia.org/wiki/Strowger_switch

    Western Electric 7A Rotary, friction drive (Bird-cage), No. 7001 Line Finder. ... The Strowger switch is the first commercially successful electromechanical stepping ...

  7. Rotary system - Wikipedia

    en.wikipedia.org/wiki/Rotary_system

    The Rotary and Panel systems were very different systems, but both used the same newly developed component technology, such as Western Electric's latest relays, and the principles of the Lorimer system [1] of revertive pulsing and preselection. [2] The Rotary switches were smaller than the Panel system, and served only 200 rather than 500 stations.

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