Combination locks have one or more numerical dials that open the lock when the correct combination is. Knob locks are the most common type of door lock available and the primary security method for most doors. The lock cylinder is located on the knob itself instead of on the door. Knob locks should therefore not be used on external doors, as they can be easily broken with basic tools such as a hammer or key.
Cam locks consist of a fastener with an attached arm, or cam, that rotates to lock it. They are cylindrical and have a metal tube with a hole on one side that helps position the bolt when inserted. These door locks are commonly used on vending machines, filing cabinets, desks or cabinets to prevent unauthorized access. In fully constructed cabinets, they are invisible for the most part.
Certain cam locks fully secure cabinet doors, making them attractive for protecting sensitive materials. Padlocks are easy to recognize both because of their mobile nature and because of their shackle shape with a loop-shaped handle. They can be designed with shoulders raised around the shackle, also known as protected or wrapped padlocks, to prevent bolt cutters from going through them. Keypad locks can be opened with an attached numeric keypad instead of a key.
They can be battery operated or mechanical and typically use bolt locks, knob locks, or mortise locks for the actual locking mechanism. These locks offer greater versatility and allow keyless entry, although many also have holes to open other unlocking mechanisms. Some keyboard locks allow for multiple custom codes, so building managers can easily restrict access. The above list does not include everyone.
There are many other door locks, and many fall into the seven categories of knob locks, bolt locks, cam locks, padlocks, mortise locks, smart locks, and keypad locks. For example, door locks with a lever handle are used for interior doors and work much like knob locks. The orientation of the door, or the direction in which the door moves when opened, is another crucial factor for the installation of the lock. Some locks work with a specific hand, while others work for both.
For example, deadbolt locks can be installed on any type of manual door without any problem. The orientation of the door depends on which side of the door has the hinges; hinges aligned to the right mark a door on the right, while hinges aligned to the left mark a door on the left. Cam locks are a very versatile type of lock that is most commonly used for low-security applications. You'll usually see them in filing cabinets and mailboxes.
Cam locks are available in a wide variety of different lengths and in a handful of different subtypes. In fact, they are one of the most customizable types of locks that exist. Padlocks are not embedded in a door or furniture. They can be attached or removed at will by using a shackle to hold a door closed or an object in place.
They are often used to lock sheds, school lockers, and even luggage. While padlocks are common, they're also considered a relatively weak lock because it's easy to break them if you have access to a cutter, drill, or hammer. They are also easy to pick up. These locks are unlocked by entering a certain series of numbers into the lock, which means that, in theory, only someone who knows the correct number sequence can unlock them.
The number sequence can also be reset to keep the code secure. Similar in appearance to combination locks, these locks are opened with a small key instead of a numerical sequence. While some people prefer not to have to remember a set of numbers to access their belongings, there is a risk of losing the key because they are usually quite small. While some key locks can be reopened, this doesn't happen on all models, so if you lose your key, you may have to break the lock to access whatever is protecting the lock.
The locks can be installed on the surface of the door (think of a bolt that slides from the top of the door itself to a housing secured in the door jam) or they can be installed inside the door for added security. The internal lock is more common because it is more secure. Also known as a “vertical bolt”, this lock is commonly used on double doors and entrance doors to apartments. Jimmy Proof locks use two interlocking vertical bolts.
When the lock is activated, those bolts enter a locking plate. The advantage of a Jimmy Proof lock is that it is easy to install and difficult for potential thieves to open, since it cannot be unhooked by separating the frame from the door. Some models even have a way of closing the lock so that you can't use a key to enter from the outside. This prevents a thief from opening the lock while you're at home.
Handle locks can be found on all types of doors, both internal and external, but their strengths and weaknesses can make one better than the other, depending on where you use them. .
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