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  2. Master keying - Wikipedia

    en.wikipedia.org/wiki/Master_keying

    Unlike a master key system, where each individual lock has one individual operating key and one common master key, a maison lock is designed to be operated by every key within the system. Because of the inherent lack of security in the maison key system, some jurisdictions prohibit the use of maison key systems in apartment and condominium ...

  3. Master Lock - Wikipedia

    en.wikipedia.org/wiki/Master_Lock

    Master Lock is an American company that sells padlocks, combination locks, safes, and related security products. Now a subsidiary of Fortune Brands Innovations , Master Lock Company LLC was formed in 1921 by locksmith -inventor Harry Soref and is headquartered in Oak Creek, Wisconsin .

  4. Skeleton key - Wikipedia

    en.wikipedia.org/wiki/Skeleton_key

    Two warded lock keys and a homemade skeleton key. A skeleton key (also known as a passkey [1]) is a type of master key in which the serrated edge has been removed in such a way that it can open numerous locks, [2] most commonly the warded lock. The term derives from the fact that the key has been reduced to its essential parts. [2]

  5. Best Lock Corporation - Wikipedia

    en.wikipedia.org/wiki/Best_Lock_Corporation

    Best Lock Corporation was an American publicly traded door hardware and lock manufacturer. Founded in 1925 as Best Universal Lock Company by Frank Ellison Best, the privately held company relocated from Seattle , Washington, to Indianapolis , Indiana, in 1938, where operations expanded and evolved.

  6. Locksmithing - Wikipedia

    en.wikipedia.org/wiki/Locksmithing

    Harry Soref founded the Master Lock Company in 1921 and patented an improved padlock in 1924 with a patent lock casing constructed out of laminated steel. Linus Yale Sr. invented a pin tumbler lock in 1848. Linus Yale Jr. improved upon his father's lock in 1861, using a smaller, flat key with serrated edges that is the basis of modern pin ...

  7. Knox Box - Wikipedia

    en.wikipedia.org/wiki/Knox_Box

    A Knox vault in an academic building A Knox KeySecure, attached inside the cab of a fire engine, holds a high-security key [broken anchor] to open KnoxBox key boxes in the area. A Knox Box is a small, wall-mounted safe that holds building keys for fire departments , emergency medical services , and sometimes police to retrieve in emergency ...

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