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  2. Vandal-resistant switch - Wikipedia

    en.wikipedia.org/wiki/Vandal-resistant_switch

    This vandal- and weather-resistant switch is used to request a traffic stop signal. Vandal-resistant switches (also referred to as vandal-proof switches) are electrical switches designed to be installed in a location (or device) and application where they may be subject to abuse and attempts to damage them, as in the case of pedestrian crossing switches.

  3. 'Door close' buttons on most elevators don't work for a reason

    www.aol.com/lifestyle/2016-11-02-door-close...

    It is often tempting to press the door-close button in an elevator, but that effort will likely not make the doors move any faster. This is because, as the New York Times reports, these buttons ...

  4. Elevator - Wikipedia

    en.wikipedia.org/wiki/Elevator

    Inside the elevator there is no call button to push, or the buttons are there but they cannot be pushed—except door opening and alarm button—they only indicate stopping floors. The idea of destination control was originally conceived by Leo Port from Sydney in 1961, [ 67 ] but at that time elevator controllers were implemented in relays and ...

  5. Push-button - Wikipedia

    en.wikipedia.org/wiki/Push-button

    A push-button (also spelled pushbutton) or simply button is a simple switch mechanism to control some aspect of a machine or a process. Buttons are typically made out of hard material, usually plastic or metal. [1] The surface is usually flat or shaped to accommodate the human finger or hand, so as to be easily depressed or pushed.

  6. Placebo button - Wikipedia

    en.wikipedia.org/wiki/Placebo_button

    A walk button in Bensonhurst, Brooklyn. Many walk buttons at pedestrian crossings were once functional in New York City, but now serve as placebo buttons. [7]In the United Kingdom and Hong Kong, pedestrian push-buttons on crossings using the Split Cycle Offset Optimisation Technique may or may not have any real effect on crossing timings, depending on their location and the time of day, and ...

  7. Push switch - Wikipedia

    en.wikipedia.org/wiki/Push_switch

    A push switch (button) is a momentary or non-latching switch which causes a temporary change in the state of an electrical circuit only while the switch is physically actuated. An automatic mechanism (i.e. a spring ) returns the switch to its default position immediately afterwards, restoring the initial circuit condition.