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  2. Trapped-key interlocking - Wikipedia

    en.wikipedia.org/wiki/Trapped-key_interlocking

    The key can then be used to unlock the kiln door. While the key is removed from the switch interlock, a plunger from the interlock mechanically prevents the power switch from being turned on. Power cannot be re-applied to the kiln until the kiln door is locked, releasing the key, and the key is then returned to the power switch interlock. [5]

  3. Fuerte de Buenos Aires - Wikipedia

    en.wikipedia.org/wiki/Fuerte_de_Buenos_Aires

    Originally the fortress had been raised for the defense of the city against possible incursions by pirates, was also the residence of the authorities of Buenos Aires. [ 3 ] Among the General Staff of the Fort of Buenos Aires were the Captains Francisco Pérez de Burgos , Miguel de Riglos , Miguel Gerónimo de Esparza and his son Juan Miguel de ...

  4. Output signal switching device - Wikipedia

    en.wikipedia.org/wiki/Output_Signal_Switching_Device

    An output signal switching device (OSSD) is an electronic device used as part of the safety system of a machine. It provides a coded signal which, when interrupted due to a safety event, signals the machine to shut down. It works by converting the standard direct current supply, usually 24 volts, into two pulsed and out-of-phase signals.

  5. List of established military terms - Wikipedia

    en.wikipedia.org/wiki/List_of_established...

    Star fort: a star-shaped fortress surrounding a town or city (also known as Bastion fortress or Trace italienne). Team room: [10] Tenaille (archaic Tenalia): an advanced pincer-shaped defensive work in front of the main defences of a fortress. Terreplein: the fighting platform on top of a rampart, behind the parapet.

  6. Lowering Protection Level for AOL Tech Fortress powered by ...

    help.aol.com/articles/lowering-protection-level...

    Tech Fortress is similar to a firewall which means that it acts as a locked gate that blocks intruders from accessing your computer and permits the passage of desirable application. Sometimes Tech Fortress will have some conflicts with certain executable programs that are downloaded from the Internet.

  7. Portcullis - Wikipedia

    en.wikipedia.org/wiki/Portcullis

    Portcullis at Desmond Castle, Adare, County Limerick, Ireland The inner portcullis of the Torre dell'Elefante in Cagliari, Sardinia, Italy A portcullis (from Old French porte coleice ' sliding gate ') is a heavy, vertically closing gate typically found in medieval fortifications. [1]