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  2. Night latch - Wikipedia

    en.wikipedia.org/wiki/Night_latch

    A night latch (or night-latch or nightlatch) is a lock that is fitted on the surface of a door; it is operated from the exterior side of the door by a key and from the interior (i.e. "secure") side of the door by a knob. [1] [2] [3]

  3. Electric strike - Wikipedia

    en.wikipedia.org/wiki/Electric_strike

    This is exactly the same principle as a child safety door lock which is installed on car doors. Electric strikes on AC may allow someone outside the door to hear when the door is unlocked. A buzzing noise is typically made by applying alternating current (AC) to the strike instead of direct current (DC). When using a DC powered strike, the ...

  4. Power door locks - Wikipedia

    en.wikipedia.org/wiki/Power_door_locks

    Pressing a button on the key unlocks all of the car doors. Another button locks the car. In 1980, Ford Motor Company introduced an external keypad-type keyless entry system, wherein the driver entered a numeric combination —either pre-programmed at the factory or one programmed by the owner— to unlock the car without the key.

  5. Door closer - Wikipedia

    en.wikipedia.org/wiki/Door_closer

    A door closer is a mechanical device that regulates the speed and action of a door’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior. Door closers can be linked to a building's fire and security alarm systems. [2]

  6. Scissor doors - Wikipedia

    en.wikipedia.org/wiki/Scissor_doors

    The Lamborghini Aventador The Lamborghini Countach. Scissor doors (also called flap doors, wing doors, beetle-wing doors, turtle doors, switchblade doors, swing-up doors, upswing doors, Lamborghini doors, [1] and Lambo doors) are automobile doors that rotate vertically at a fixed hinge at the front of the door, [2] rather than outward as with a conventional door.

  7. Swing Door (train) - Wikipedia

    en.wikipedia.org/wiki/Swing_Door_(train)

    The first Swing Door D car withdrawn was 21D in 1951. 26D and 9D followed in 1956 and 1957 respectively, and withdrawals of the Swing Door fleet accelerated from there. 18D and 22D were removed from service in 1962, and the next year took 4, 8, 10, 13, 20, 23 and 30. 3 and 5 in 1964, 7 and 11 in 1965, 14D in 1966 and 28D in 1967, then a short ...

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