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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. Miniature snap-action switch - Wikipedia

    en.wikipedia.org/wiki/Miniature_snap-action_switch

    A motor-driven cam (usually relatively slow-speed) and one or more micro switches form a timer mechanism. The snap-switch mechanism can be enclosed in a metal housing including actuating levers, plungers, or rollers, forming a limit switch useful for control of machine tools or electrically-driven machinery.

  4. Programmable logic controller - Wikipedia

    en.wikipedia.org/wiki/Programmable_logic_controller

    Similarly, a parallel set of instructions will perform a logical OR. In an electromechanical relay wiring diagram, a group of contacts controlling one coil is called a "rung" of a "ladder diagram", and this concept is also used to describe PLC logic. Some models of PLC limit the number of series and parallel instructions in one "rung" of logic.

  5. Video shows suspect allegedly steal Oregon delivery truck ...

    www.aol.com/video-shows-suspect-steal-oregon...

    Surveillance footage captured a man taking off in a delivery truck while a worker was loading the vehicle at an Oregon-based warehouse. Beaverton Police said the incident occurred around 4 a.m ...

  6. 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 ...

  7. When do fifth College Football Playoff rankings come out ...

    www.aol.com/fifth-college-football-playoff...

    The College Football Playoff releases the fifth top 25 rankings of the season Tuesday. Here’s what to know and how to watch the show.

  8. Disabled Macaw’s Mom Helps Her With ‘Assisted Flying’ in ...

    www.aol.com/disabled-macaw-mom-helps-her...

    This will bring a smile to your face. Rescuing an animal from abuse, neglect, or, in some cases, euthanasia can change your life, and theirs, too.

  9. Valve actuator - Wikipedia

    en.wikipedia.org/wiki/Valve_actuator

    The limit switches signal when an end position has been reached. The torque switching measures the torque present in the valve. When exceeding a set limit, this is signaled in the same way. Actuators are often equipped with a remote position transmitter which indicates the valve position as continuous 4-20mA current or voltage signal.

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