A padlock is a safety device which is used as a portable lock, when the doors or compartments allow us to place a lock today. The padlock was and is cheaper than a lock and is easier to use, and it is used, for example, in large doors that are secured with chains in order to make sure that padlock is placed between the links of the chain and then closed.
If you have a small chest or a cupboard with a door, two locks are placed on top of each other and a small padlock is placed to secure the valuable stuff.
To open a padlock, a normal steel key is used, although there are some that are opened by a set of keys that are introduced into the locking system that allow an alignment of the closure, and therefore its opening. In some occasion, these padlocks are reprogrammed and their key changes for safety.
In the ancient times, there were no padlocks, and people only secured their doors by tying them up or putting them on a stick. However, at the end of the 17th century, Christopher Polhem manufactured a kind of padlock. Today, we see there are many types of padlocks available.
Types of Padlocks
There are different types of padlocks today, as we have Cylindrical bolt latch used as cylindrical pins of uneven length and operate with a tubular shaped wrench.
This system is a fixed combination with no master key system, which means that the vendors provide a key combination that cannot be changed by a master key. If padlocks have a fixed combination with a master key system that can be operated by a master key, which means that it will work with any type of key.
There are the largest and strongest models used on large metal doors. In addition, there are the common padlocks that ensure goods that remain unfailingly in the street as bikes and motorcycles, and these padlocks are complemented by a metal chain to be able to secure the vehicle.
All padlocks except one model are sold with keys cut differently or cut in the same way, in certain cases, they are offered with a master key where each one has its individual key and at the same time with the key that works for all. Most of the models that are commercialized on the market are very useful and flexible and satisfy the generality of the consumers.