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Patents relating to early versions of the lock go back to at least 1907. Fox set up the Fox Police Lock Company in New York City to manufacture the locks under the brand name Police Lock; [1] other companies have made similar locks under the same designation, [2] so the term has become genericized to a degree. The name comes from the police ...
Higher security lever locks (such as the five-lever) usually have notches cut into the levers. These catch the locking bolt and prevent it from moving if picking is attempted (similar to the security pins in a pin tumbler lock). The Chubb detector lock is a variation of the lever lock which was designed to detect and prevent picking attempts.
For example, master keyed pin tumbler locks often have two shear points at each pin position, one for the change key and one for the master key. A far more secure (and more expensive) system has two cylinders in each lock, one for the change key and one for the master key. Master keyed lock systems generally reduce overall security. [2]
In addition to locks, such as the classic padlock or locks for doors, windows, bicycles and motorbikes, ABUS also produces smoke alarms, video surveillance systems, products for two-wheeler and boat security, alarm systems, locking systems and access control systems, [53] and in 2018, Abus expanded its range of smart home solutions.
Security hardware includes doors, locks, alarm systems, lighting, motion detectors, and security camera systems. Personal security involves practices like ensuring doors are locked, alarms are activated, owning a Dog, windows are closed, and extra keys are not hidden outside.
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