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  2. Portcullis - Wikipedia

    en.wikipedia.org/wiki/Portcullis

    A portcullis (from Old French porte coleice 'sliding gate') is a heavy, vertically closing gate typically found in medieval fortifications. [1] A portcullis gate is constructed of a latticed grille, made of wood or metal or both, which slides down grooves inset within each jamb of the gateway.

  3. Caisson (lock gate) - Wikipedia

    en.wikipedia.org/wiki/Caisson_(lock_gate)

    Most locks are closed by chevron or mitre gates rather than by caissons. These are pairs of hinged gates that form a "V" shape, with the deeper water outside the V. Water pressure thus holds them closed. These gates can be opened and closed quickly, so they are used for canal locks, to change levels, and also for most freight docks.

  4. 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 ...

  5. Latch - Wikipedia

    en.wikipedia.org/wiki/Latch

    A Suffolk latch is a type of latch incorporating a simple thumb-actuated lever and commonly used to hold wooden gates and doors closed. Comparison of Suffolk and Norfolk latches. The Suffolk latch originated in the English county of Suffolk in the 16th century and stayed in common use until the 19th century.

  6. Pin tumbler lock - Wikipedia

    en.wikipedia.org/wiki/Pin_tumbler_lock

    The first known example of a tumbler lock was found in the ruins of the Palace of Khorsabad built by king Sargon II (721–705 BC.) in Iraq. [1] Basic principles of the pin tumbler lock may date as far back as 2000 BC in Egypt; the lock consisted of a wooden post affixed to the door and a horizontal bolt that slid into the post.

  7. David J. Marks - Wikipedia

    en.wikipedia.org/wiki/David_J._Marks

    David J. Marks is a woodworker living in Santa Rosa, California. [1] Marks studied art at Cabrillo College in Santa Cruz, California. In 1981, he opened a studio in Santa Rosa with his cat Liz and his young daughter. Through the 1980s, his focus was on one-of-a-kind furniture. Beginning in the 90s, he has moved toward wood turning and sculpture.