How Does A Deadlock Door Lock Work

Double cylinder locks will accept a key on both sides and therefore do not require and often do not have any twist knob.

How does a deadlock door lock work.

A deadlock if it is cylinder operated may be either single cylinder or double cylinder. Here are six things you need to know about mortise locks for residential door security. Before you buy a deadlock work out whether you have a left or right handed door. A 5 lever mortice deadlock is commonly fitted to wooden doors and is locked from both the inside and outside with a key they are fitted within the material of the door rather than on the surface.

Heavy weather stripping can cause a problem if the latch works perfectly when the door is closed gently. The key to match the particular lock lifts the pins to the correct height to allow the latch the part that protrudes into the door frame to be pulled back against the spring allowing the door to open. If it does the problem can be corrected by moving the strike plate towards the exterior. Most likely the door latch installation somehow kept the deadlocking plunger also called a deadlock latch from being engaged or allowed it to be disengaged.

A single cylinder deadlock will accept a key on one side of the lock but is operated by a twist knob on the other side. Each pair of pins rests in a shaft which goes through the center of the cylinder and into the area around it. Also check the backset the distance between the outside of the door and the centre of the doorknob that is how far the handle is set back from the door edge. Inside a cylinder there are several pairs of pins along with tumblers.

The minimum door width is 45mm or 1 75 inches. The most common backset measures in australia are either 60mm or 70mm. To do this step outside and look at the door if the hinges are on the left it s a left handed door and vice versa. Very small springs are placed at the top of each shaft.

1 the mortise lock defined. Any five lever mortice deadlock that is not bs3621 approved will usually have a nightlatch fitted as additional security. To use a mortise lock your door must be thick enough to accommodate it. It is the purpose of this part of the door lock mechanism to prevent doors from being opened in this fashion.

These are electrically powered magnets which when energised powered up will grab hold of a metal plate fitted opposite to the magnet creating a phenomenal hold typically anywhere between 250kg and 500kg per magnet. Each pin is of a different height. This prevents unwanted unlocking of the door by forced access to the interior twist knob via a nearby window for example.