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  2. Crossbar latch - Wikipedia

    en.wikipedia.org/wiki/Crossbar_latch

    The Crossbar latch is a technology published by Phillip Kuekes of HP Labs in 2001 and granted a US patent in 2003, [1] with the goal of eventually replacing transistors in various applications. [2] This would enable the creation of integrated circuits composed solely of memristors , which, according to the patent, might be easier and less ...

  3. Electromagnetic door holder - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_door_holder

    Wall-mounted electromagnetic door holder securing a door in the open position. An electromagnetic door holder (electromagnetic door holder and release or hold-open device, sometimes informally called a mag hold open or electric doorstop) is a simple electromechanical mechanism which can be used to hold a fire door or security door open until given a signal to release.

  4. Police lock - Wikipedia

    en.wikipedia.org/wiki/Police_lock

    Crossbar police lock schematic. Another type of lock also called a police lock and also formerly made by the Fox Police Lock Company is the crossbar police lock. It features two steel bars across the width of the door and beyond, held by two brackets set in the doorframe. [1] [3] When the door is unlocked, the bars are moved inwards to the ...

  5. Electric strike - Wikipedia

    en.wikipedia.org/wiki/Electric_strike

    An electric strike is an access control device used for door frames. It replaces the fixed strike faceplate often used with a latch (also known as a keeper). Like a fixed strike plate, it normally presents a ramped or beveled surface to the locking latch allowing the door to close and latch just like a fixed strike would.

  6. Mul-T-Lock - Wikipedia

    en.wikipedia.org/wiki/Mul-T-Lock

    Mul-T-Lock was established in 1973, with the invention of the 4-way lock. In 1976,Its marketing efforts expanded internationally in 1976. As the company experienced growth, it expanded its manufacturing facilities. [2] In 1987 Mul-T-Lock opened its first business unit in the United States and its second manufacturing plant in Israel. [3]

  7. Master Lock - Wikipedia

    en.wikipedia.org/wiki/Master_Lock

    In 2012, Master Lock introduced a line of combination padlocks called the dialSpeed. [17] The dialSpeed lock is battery-operated, has a lit face, and features multiple user-programmable combinations. It has a master unlocking code that can be accessed through the company web site. [17] In 2014, Master Lock acquired SentrySafe for $117.5 million ...

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