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  2. Infinite switch - Wikipedia

    en.wikipedia.org/wiki/Infinite_switch

    An early switch operating by this principle was invented by Chester I. Hall of the General Electric Company, with a patent filed in 1921 and approved in 1924.Like the modern infinite switch, Hall's invention used a bi-metallic strip, heated by a constant current, to break a connection after a given period of time.

  3. Induction heater - Wikipedia

    en.wikipedia.org/wiki/Induction_heater

    Induction heating is a non contact method of heating a conductive body by utilising a strong magnetic field.Supply (mains) frequency 50 Hz or 60 Hz induction heaters incorporate a coil directly fed from the electricity supply, typically for lower power industrial applications where lower surface temperatures are required.

  4. Control loop - Wikipedia

    en.wikipedia.org/wiki/Control_loop

    A control loop is the fundamental building block of control systems in general and industrial control systems in particular. It consists of the process sensor, the controller function, and the final control element (FCE) which controls the process necessary to automatically adjust the value of a measured process variable (PV) to equal the value of a desired set-point (SP).

  5. Proportional–integral–derivative controller - Wikipedia

    en.wikipedia.org/wiki/Proportional–integral...

    The distinguishing feature of the PID controller is the ability to use the three control terms of proportional, integral and derivative influence on the controller output to apply accurate and optimal control. The block diagram on the right shows the principles of how these terms are generated and applied.

  6. Hot Frosty? Try hot Santa. Target heats up the holidays with ...

    www.aol.com/hot-frosty-try-hot-santa-183705988.html

    Target has a new "weirdly hot" Santa Claus and the internet is swooning.. Kris K., Target's newest team member featured in the retailer's latest holiday ads, loves the holidays "way more than the ...

  7. Michigan Court declines to hear appeal of ex-officer charged ...

    www.aol.com/michigan-court-declines-hear-appeal...

    Schurr's attorneys have argued that he should not have to stand trial because he was acting within his rights as a law enforcement officer. Last January, a Court of Appeals panel ruled 2-1 that ...

  8. Which 38 Republicans voted against Trump's plan to keep the ...

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    The U.S Capitol is seen after U.S, President-elect Donald Trump called on U.S. lawmakers to reject a stopgap bill to keep the government funded past Friday, raising the likelihood of a partial ...

  9. Control system - Wikipedia

    en.wikipedia.org/wiki/Control_system

    The control action is the switching on/off of the boiler, but the controlled variable should be the building temperature, but is not because this is open-loop control of the boiler, which does not give closed-loop control of the temperature. In closed loop control, the control action from the controller is dependent on the process output.

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