Ads
related to: 5 lever mortice locks for external doors
Search results
Results From The WOW.Com Content Network
Again, the term refers to the lock mechanism, so a lock can be both a mortise lock and a lever tumbler lock. In the modern lever tumbler lock, the key moves a series of levers that allow the bolt to move in the door. [5] Pin tumbler lock, commonly used for mortise locks in the US. The next major innovation to mortise lock mechanisms came in 1865.
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.
This is an accepted version of this page This is the latest accepted revision, reviewed on 16 January 2025. Device to open or close door Various examples of door handles throughout history A door handle or doorknob is a handle used to open or close a door. Door handles can be found on all types of doors including: exterior doors of residential and commercial buildings, internal doors, cupboard ...
Historically, such locks were intended for use at night-time, hence the name. [5] The keyless egress that they offer is a valuable fire safety measure, but may be a security risk if breaking a glass panel (usually in the door) or a nearby small window allows an intruder to reach the knob inside and open the door from the outside.
Within the United Kingdom it is standard practice to have a 5-lever British standard mortise lock fitted to a wooden door, this will ensure that the property is compliant within the insurance sector. [7] A cylinder that is anti-snap fitted to a uPVC door will prevent lock snapping.
[5] Face plate A metal plate on the lockset itself (on the door, not the jamb) is called a face plate. False gate A false gate is a mechanical element on levers in lever tumbler locks or discs in disc tumbler locks to make the lock more difficult to pick. Glass relocking device