Deadbolt Locks South Western Ontario
Locksmith South Western Ontario 647-866-0956
Deadbolt Locks South Western Ontario
The easiest way in which to define a deadbolt or deadlock is to describe it as a locking mechanism, which is different from a spring bolt lock simply because a deadbolt cannot be moved to the open position unless the lock cylinder is rotated with the use of a key. In most of the common spring bolt locks a spring is used to keep the bolt in place, which will allow retraction when force is applied to the bolt itself.
This is why a door, which has been fitted with a deadbolt will always, be more resistant to illegal entry when the correct key is not present. In some cases, a deadbolt is used to further bolster a spring bolt lock especially if it is fitted to an entry door of a property. A cylinder-operated deadlock may either be a double cylinder or a single cylinder.
In the event of a single cylinder deadlock, it will only be possible to insert the key on one side of the lock while there will be a twist knob on the other side. When a double cylinder deadlock is present, it will be possible to insert a key from both sides and therefore the need for any twist knob is eliminated.
Benefits of double cylinder deadlocks
Because there is no interior twist knob, it will be impossible to unlock the door by turning the twist knob via a nearby window. In some areas double cylinder locks is against building regulations because they can 
be difficult to open especially from the inside and therefore they are in violation of fire safety regulations.
With some manufacturers, there may actually be a lockable knob, which will still require a key at least on one side, most often on the external side. There may also be a twist knob on the internal side, which can only be opened when a button has been pressed. If there is no button then the internal site will also require a key. There is also another variant of the standard deadbolt and this is known as the vertical deadbolt, which has been an invention of Samuel Segal.
The advantage of vertical deadbolts is that they are able to resist jimmying which is a process where a possible intruder insert a pry bar between the door jam and the door and then proceed to pry the deadbolt out of the door in order to gain access.
Different types of deadbolts
There is the single cylinder with a removable thumb-turn; there is also the push-button deadbolt, which can be either electrical or mechanical. There is also the exit only function, which does not have any external cylinder. There is also the classroom function. There are some safety concerns as far as the double cylinder design is concerned. Should there be any emergency such as a fire people inside the property will be prevented from a scraping through door which has been fitted with double cylinder deadbolts unless the correct key for the deadlock is available. It has happened that such locks have resulted in unnecessary loss of life during house fires. One way in which to avoid this is to only lock the deadlock when there are no people inside the house or alternatively a key should be readily available.
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