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  2. Zig Zag Girl - Wikipedia

    en.wikipedia.org/wiki/Zig_Zag_Girl

    Harbin was frustrated by his illusions being pirated by other magicians, and this inspired him to publish the method in his book The Magic of Robert Harbin (1970). The book was limited to 500 copies, [ 3 ] and owners of the book were granted permission to build or have built the Zig Zag Girl (or indeed any other of the items in the book).

  3. Automatic door - Wikipedia

    en.wikipedia.org/wiki/Automatic_door

    In 1954, Dee Horton and Lew Hewitt invented the first sliding automatic door. The automatic door used a mat actuator. In 1960, they co-founded Horton Automatics Inc and placed the first commercial automatic sliding door on the market. [5] With the invention of the Gunn diode, microwave motion detectors became common in automatic doors in the 1970s.

  4. Shoji - Wikipedia

    en.wikipedia.org/wiki/Shoji

    Conrad Totman argues that deforestation was a factor in the style changes, including the change from panelled wooden sliding doors to the lightweight covered-frame shoji and fusuma. [ 100 ] A core part of the style was the shoin ("library" or "study"), a room with a desk built into an alcove containing a shoji window, in a monastic style; [ 94 ...

  5. Safe-cracking - Wikipedia

    en.wikipedia.org/wiki/Safe-cracking

    While observing the lock, the attacker manipulates the dial to align the lock gates so that the fence falls and the bolt is disengaged. Bypass attacks involve physical manipulation of both the lock and its bolt mechanism. Punching, peeling and using a torch are other methods of compromising a safe.

  6. Door lock - Wikipedia

    en.wikipedia.org/wiki/Door_Lock

    a deadbolt lock; a door chain; a locking door handle; an electromagnetic lock, which holds a door shut when electricity is supplied to it; a keycard lock, commonly used on hotel doors; a mortise lock, a lock installed in a hollowed-out pocket within a door; a rim lock, a lock fixed to the exterior of the door

  7. Door security - Wikipedia

    en.wikipedia.org/wiki/Door_security

    A metal doorframe with a strike plate built in: in other doors this would be a metal strikeplate in a wooden doorframe. The term door security or door security gate may refer to any of a range of measures used to strengthen doors against door breaching, ram-raiding and lock picking, and prevent crimes such as burglary and home invasions. Door ...