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  2. Limit switch - Wikipedia

    en.wikipedia.org/wiki/Limit_switch

    A limit switch with a roller-lever operator; this is installed on a gate on a canal lock, and indicates the position of a gate to a control system A limit switch mounted on a moving part of a bridge In electrical engineering , a limit switch is a switch operated by the motion of a machine part or the presence of an object.

  3. Rheem Manufacturing Company - Wikipedia

    en.wikipedia.org/wiki/Rheem_Manufacturing_Company

    Rheem Manufacturing Company is a privately held manufacturer who produces residential and commercial water heaters, boilers, heating, ventilating and air conditioning (HVAC) equipment. The company also produces and sells products under the Ruud brand name.

  4. Restrictor plate - Wikipedia

    en.wikipedia.org/wiki/Restrictor_plate

    Artist rendering of a NASCAR restrictor plate. A restrictor plate or air restrictor is a device installed at the intake of an engine to limit its power. This kind of system is occasionally used in road vehicles (e.g., motorcycles) for insurance purposes, but mainly in automobile racing, to limit top speed to provide equal level of competition, and to lower costs; insurance purposes have also ...

  5. Norwegian railway signaling - Wikipedia

    en.wikipedia.org/wiki/Norwegian_railway_signaling

    If the yellow lamp fails, a relay will also switch off the green light and the signal becomes totally dark, which is then treated as "expect stop." A capacitor in the relay circuit ensures that the relay operation is a couple of seconds delayed, to prevent the relay operating for every blink.

  6. Railway signals in Germany - Wikipedia

    en.wikipedia.org/wiki/Railway_signals_in_Germany

    Three white flashing lights aligned as a triangle or a flashing diagonal light Indicates that a signal at danger may be passed when wrong line working is in force. If the signal guards points/switches the speed limit is 40 km/h; otherwise, the limit is 100 km/h to the next station.

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