Nowadays, on the doors of almost any entrance, we can see combination locks. At their core, they are not completely reliable, but they still help to keep the staircase clean and prevent outsiders from entering it.
Combination locks differ in principle of operation, device and, accordingly, cost. They are mounted and built-in, mechanical and electronic. In order to open the code lock, you must enter in a certain way (most often using the keyboard) the code sequence stored in the secret of the lock. Such locks have both pros and cons compared to conventional ones. Among the advantages can be distinguished lack of
Your keys, which tend to get lost at the most inopportune moment. If relatives or friends come to visit you, there is no need to make duplicates. Also, the pluses include the ability to change the code if there is a suspicion that the old code has become known to strangers. The downside is that the code can be forgotten corny or it can be spied by an outsider. Undoubtedly, the disadvantages include the fact that with frequent typing of the same code on the buttons, the numbers are erased, and a likely attacker can easily take advantage of this. For this reason
e codes need to be changed as often as possible.
On the doors of buildings, you can often find mechanical combination locks. This is due to their simplicity of design and relatively high reliability. Such locks are made of quality steel. Unlike electronic locks, they do not depend on electricity, and also practically do not have mechanisms that can break. Inside are cylinders, which, after entering the code, line up in a certain sequence, and the door opens. After opening the door, it is enough to simply close it behind you, such a lock will snap into place automatically (if you have an auto-drawer, you don’t even need to do this, the door will close itself).
Another variety are electronic combination locks. They are also used on the doors of buildings along with mechanical ones, but are more expensive due to the fact that they use modern microprocessor technologies. Unlike mechanical combination locks, in electronic code sequences are stored in the memory of an electronic device. They also lack bulky cylinders and buttons. They are replaced by a miniature optical panel and keyboard. They are considered more progressive, as they have a number of additional functions, such as, for example, lighting the keyboard or opening a door using a special card, but they should also take into account several nuances. Firstly, such a castle should have protection from the weather (no water should get inside), and secondly, for normal operation it
need a constant supply of electricity.
A separate type of combination locks is a padlock combination lock. It is a usual padlock with a few wheels (usually 3-4) for dialing the corresponding code. Due to this, it is more reliable than a conventional padlock, but still less reliable than a built-in lock, since the steel arch can be cut. Most often, such locks are used to close garages, closets or utility rooms.