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Crossbar telephone exchange of 1903 for four subscribers (vertical bars), having four cross-bar talking circuits (horizontal bars), and one bar to con
Crossbar telephone exchange of 1903 for four subscribers (vertical bars), having four cross-bar talking circuits (horizontal bars), and one bar to connect the operator (T). The lowest cross-bar connects idle stations to ground to enable the signaling indicators (F). The switch is operated manually with metal pins that create a connection between the horizontally and vertically arranged bars.
Western Electric 100-point six-wire Type B crossbar switch
Western Electric 100-point six-wire Type B crossbar switch
Late-model Western Electric crossbar switch
Late-model Western Electric crossbar switch
Back of Type C
Back of Type C
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Electrical switches. Top, left to right: circuit breaker, mercury switch, wafer switch, DIP switch, surface mount switch, reed switch. Bottom, left to
Electrical switches. Top, left to right: circuit breaker, mercury switch, wafer switch, DIP switch, surface mount switch, reed switch. Bottom, left to right: wall switch (U.S. style), miniature toggle switch, in‑line switch, push-button switch, rocker switch, microswitch.
Three push button switches (Tactile Switches). Major scale is inches.
Three push button switches (Tactile Switches). Major scale is inches.
A toggle switch in the "on" position
A toggle switch in the "on" position
Triple-pole single-throw (TPST or 3PST) knife switch used to short the windings of a three‑phase wind turbine for braking purposes. Here the switch is
Triple-pole single-throw (TPST or 3PST) knife switch used to short the windings of a three‑phase wind turbine for braking purposes. Here the switch is shown in the open position.