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  2. 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.

  3. List of This Old House episodes (seasons 11–20) - Wikipedia

    en.wikipedia.org/wiki/List_of_This_Old_House...

    At the house, the guys install the new front door. Hazel's security system is reviewed. Jeff Hosking checks out the state of the house's floors, sanding what he can. Host Steve Thomas then takes viewers to the historic Gardner-Pingree House in Salem, Massachusetts, to see how floorclothes are made.

  4. Marie Van Brittan Brown and Albert L. Brown - Wikipedia

    en.wikipedia.org/wiki/Marie_Van_Brittan_Brown...

    A security system for protecting the interior of a place of residence having an entrance door, comprising a plurality of windows in the door disposed in vertically spaced array; protective plates covering the windows, respectively; means pivotally supporting said plates on the door to clear each of the windows; a cabinet containing a video ...

  5. Doorbell - Wikipedia

    en.wikipedia.org/wiki/Doorbell

    Doorbell mechanism from 1884 in Andrássy Avenue, Budapest Antique mechanically operated shop doorbell on a torsion spring. William Murdoch, a Scottish inventor, installed a number of his own innovations in his house, built in Birmingham in 1817; one of these was a loud doorbell, that worked using a piped system of compressed air. [1]

  6. Mantrap (access control) - Wikipedia

    en.wikipedia.org/wiki/Mantrap_(access_control)

    A mantrap, security mantrap portal, airlock, sally port or access control vestibule is a physical security access control system comprising a small space with two sets of interlocking doors, such that the first set of doors must close before the second set opens.

  7. Padlock - Wikipedia

    en.wikipedia.org/wiki/Padlock

    A high security dual-barrel padlock. A quantitative measure of a padlock's tensile strength and resistance to forced and surreptitious entry can be determined with tests developed by organizations such as ASTM , Sold Secure (United Kingdom), CEN (Europe), and TNO (The Netherlands).