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The "modern interchangeable core" [2] —and all other cores, as well—actually has its roots in "a bulkier, pedestal-shaped removable configuration" [3] developed in 1919 by Frank Best, then proprietor of Best Universal Lock Company.
In addition to its associated commercial and architectural primary hardware components - such as locksets, padlocks, specialty locks and accessories [2] - Best Access is primarily known for its "small format" interchangeable cores, which were introduced under Frank Best's direction in the 1960s as a replacement for the removable core keying configuration that he had first developed in 1919.
Key Retainer for Small Format Interchangeable Cores. A key retainer device (KRD) is a small metal unit that is wall or door mounted, usually designed for the interchangeable core that retains one key (Key A) while the second key (Key B) is used for authorized purposes. When the key in use (Key B) is returned into the key retainer, the key held ...
The lock housing is the part of the lock that does not move when the lock is opened. It is responsible for transferring the action of the key to the bolt. [7] Master pin In a pin tumbler lock, a master pin is an optional, usually short, disk-like pin placed between the top and bottom pins. Its purpose is to allow two differently-cut keys to ...
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Elton John's gift may be his song, but that doesn't mean he loves them all.. During an appearance on The Late Show with Stephen Colbert on Tuesday, Dec. 17, the 77-year-old musician spoke about ...
These locks were intended to be interchangeable, being manufactured in large volumes in a steam-powered factory using gauges and lathes. Subsequent experiments have suggested that the lock's components were interchangeable at a higher rate than those of the later British New Land Pattern musket and the American M1816 musket. [8]
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