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  2. Wireless power transfer - Wikipedia

    en.wikipedia.org/wiki/Wireless_power_transfer

    Wireless power transfer (WPT; also wireless energy transmission or WET) is the transmission of electrical energy without wires as a physical link. In a wireless power transmission system, an electrically powered transmitter device generates a time-varying electromagnetic field that transmits power across space to a receiver device; the receiver ...

  3. Faraday cage - Wikipedia

    en.wikipedia.org/wiki/Faraday_cage

    Elevators and other rooms with metallic conducting frames and walls simulate a Faraday cage effect, leading to a loss of signal and "dead zones" for users of cellular phones, radios, and other electronic devices that require external electromagnetic signals. During training, firefighters and other first responders are cautioned that their two ...

  4. Powerlight Technologies - Wikipedia

    en.wikipedia.org/wiki/Powerlight_Technologies

    The vehicle was equipped with a small on-board battery capable of only a few minutes of flight. On August 7, 2012, PowerLight equipped a Lockheed Martin Stalker UAS with a laser receiver, and the system was successfully demonstrated during day and night operations in the desert. This series of demonstration flights is described as "the first ...

  5. Inductive charging - Wikipedia

    en.wikipedia.org/wiki/Inductive_charging

    Inductive charging (also known as wireless charging or cordless charging) is a type of wireless power transfer. It uses electromagnetic induction to provide electricity to portable devices. Inductive charging is also used in vehicles, power tools, electric toothbrushes, and medical devices.

  6. Paternoster lift - Wikipedia

    en.wikipedia.org/wiki/Paternoster_lift

    A paternoster in Prague Paternoster elevator in The Hague, when it was still in operation. A paternoster (/ ˌ p eɪ t ər ˈ n ɒ s t ər /, / ˌ p ɑː-/, or / ˌ p æ-/) or paternoster lift is a passenger elevator which consists of a chain of open compartments (each usually designed for two people) that move slowly in a loop up and down inside a building without stopping.

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    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. Radio-controlled aircraft - Wikipedia

    en.wikipedia.org/wiki/Radio-controlled_aircraft

    The downside of lack of elevator control is a tendency for the airplane to phugoid. To damp the phugoid oscillation naturally, the planes are designed with high drag which reduces flight performance and flying time. The lack of elevator control also prevents the ability to "pull back" during turns to prevent altitude loss and speed increase.

  9. Wireless light switch - Wikipedia

    en.wikipedia.org/wiki/Wireless_light_switch

    Wireless light switches eliminate the wire from the light to the switch location. This is useful in remodelling situations where new wiring can be a hassle. Rather than tearing down a wall to gain access to the wires, a wireless switch can be used. This avoids any need to access wires and makes remodelling fast and simple.