A latch or catch (called sneck in Northern England and Scotland) is a type of mechanical binder that connects two (or more) objects or surfaces while allowing for their regular separation. A latch usually uses other hardware on other mounting surfaces. Depending on the type and design of the latch, the hardware involved can be known as guard or strike . Note that the latch is not the same as the door or window lock mechanism, although often they are found together in the same product.
The range of latches in the complex form of flexible metal springs or plastic spikes, as used to keep the electric tool boxes made from die mold closed, to the multi-point hook latch used to keep the large door closed.
Video Latch
Tipe umum
Latch deadbolt
A single throw. Bolts can be attached to the butt plate only after the door is closed. The locking mechanism usually prevents the bolts being forcibly pulled.
Spring hook
- Latchbolt or Hookwatches The very common type of lock, usually part of the lockset, is a spring bolt with a beveled tip. When the door is pushed closed, the end of the bolt is connected to the lip of the beater plate; the spring allows the bolt to pull back. Once the door is fully closed, the bolt automatically extends to the strike plate, holding the door closed. Latchbolt is released (retracted) normally when the user turns the door handle, which via lockset mechanism, manually retracts latchbolt, allowing the door to open.
- Deadlocking latchbolt ( deadlatch ) is an elaboration on latchbolt that includes guardbolt to prevent "shimming" or "jimmying" from latch hooks. When the door is closed, the latch and guardbolt are retracted, and the door closes normally, with the latchbolt entering the strike plate. The throwing plate, however, holds the guardbolt in a depressed position: the mechanism in the lockset holds the latchbolt in its projected position. This setting prevents latchbolt from being depressed through the use of credit cards or other tools, which will lead to unauthorized entries.
- Draw Latch is a two-piece latch where one side has an arm that can attach to the other half, and when closing the tongs, pull the two parts together. Often used in tool boxes, crates, crates and windows. No need to be completely closed to secure both parts.
- Spring bolt lock (or night lock ): The locking mechanism used with latchbolt
Slam latch
The slam hook uses a spring and is activated by closing or slamming the door. Like all hooks, a slam latch is a mechanism for holding closed doors. Kait slam gets its name from its ability to slam doors and drawers close without damaging the bolt. Slam hooks are rugged and ideal for industrial, agricultural and construction applications.
Cam key
The cam key is a type of lock consisting of a base and cam . Base is where the key or tool is used to rotate the ridge, which is what is attached. Cams can be straight or offset; Reversible offset cams. Generally found in garage closets, filing cabinets, tool crates, and other locations where privacy and security are required.
Latch Norfolk
Norfolk's latch is a latch type fitted with thumb-actuated levers and is used to hold closed gates and wooden doors. In the Norfolk latch, the handle is mounted to the back plate independently of the thumb piece. Introduced around 1800-1820, the Norfolk hook, originally from the English area of ​​the same name, differs from the older Suffolk hook, which has no back plate attached to the thumb.
Pockets suffolk
A Suffolk latch is a latch type fitted with a thumb-driven lever and is used to hold closed gates and wooden doors.
The Suffolk latch originated in the English Suffolk area in the 16th century and remained in common use until the 19th century. They recently back in support, especially at the garden gates and warehouses. They were common from the 17th century until about 1825, and the lack of rear platters made them different from the later ones, and the Norfolk latch neighbors (introduced 1800-1820). Both the Suffolk latch and the Norfolk bolt are considered to have been named by architectural artist William Twopenny (1797-1873). Many of these plates find their way to America and other parts of the world.
Crossbar
A bar , sometimes called a bolt , is a primitive bind that only consists of posts that restrict the door.
Crossbars are historically common, simple fasteners consisting only of boards or beams fitted to one side of a door by a cleat set. The board can slide past the frame to block the door. Alternatively, the bar may be a separate section placed into an open cleat or hook, extending across the frame on both sides. The effect of this device is essentially the inverse of the crash bar where its operation is to allow the door to be opened inward rather than outward. In a set of double doors, the same principle applies, but does not need to go beyond the frame. The bar just extends to another cleat set on another door like to interrupt the door opening.
Cable hook
A cabin hook is a rod connected to the staples. Bars are usually permanently attached to rings or staples mounted with screws or nails for wood or wall at the same level as the eye screws. The screw of the eye is usually screwed onto the adjacent wall or to the door itself. Used for holding cabinets, doors or gates open or closed.
Cabin hooks are used in many situations to hold open doors, such as on boats to prevent doors from swinging and hitting other woods as the ship moves due to wave motion. This use also spreads to other domains, where a door must be opened or a self-closing device used to close the door.
Many buildings are built with fireproof doors to separate the various parts of the building and to allow people to be protected from fire and smoke. When using a cabin hook in such situations, one should remember that flame retardant doors are expensive and heavy items, and only serve as fire doors if always closed. To open fire doors that are often heavy with ease, a magnetic door holder is used which is released when the building of an electric fire alarm system is activated by fire. Because cabin hooks must be manually activated, they are not practical for fire doors.
Divert latch
Also named draw latch or draw catch. It has a claw or loop that catches the strike plate (named catch plate in this case) when it reaches a certain position.
Pawl
A pawl is a latch that will allow movement in one direction, but prevents back movement. Generally used in combination with ratchet wheels.
Maps Latch
Apps
Architecture
Some types of latches are usually installed in doors or windows.
Armament
Many types of armaments combine hooks with unique designs for their weapons.
Firearms
Firearms require special hooks used when loading and firing weapons.
The break-action weapon is a hinged weapon and the latch is operated to release two parts of the weapon to expose the breech and allow loading and removing ammunition. Then closed and re-locked before being fired. Separate operations may be needed to tilt and open the hammer bars to fire a new round. Break open universal action in double barrel rifles, double barrel rifles and combination weapons, and is also common in single shotguns, pistols, and rifles, and can also be found in flare guns, grenade launchers, air rifles and some older revolver designs.
Some latch designs have been used to load revolvers. In a top-break revolver, the frame is hinged on the bottom of the front of the cylinder. Its frame is in two parts, united by a latch on the back of the top of the cylinder. For a swing cylinder, the cylinder is mounted on a coaxial shaft with a chamber, and the cylinder swings out and down. Some designs, such as the Super Redhawk Ruger or the Taurus Raging Bull, use hooks on the front and back of the cylinder to provide a secure bond between the cylinder and the frame.
To fire the revolver, generally the hammer is first manually tipped and fitted in place. The trigger, when pulled, releases the hammer, which fires round in the room.
Knife
Different types of knives with folding knives or can be drawn depend on hooks for their function. Switchblade uses an internal spring to produce a blade held in place by a button-activated knob. Likewise the ballistic ballistic knob uses a strong hook to hold a strong spring from firing a knife as a projectile until triggered by opening the latch. A gravity knife depends on the latch to hold the folding knife in the open position after it is released. balisong uses a single latch to hold the folding blade open and closed, depending on the position of the handle; by rotating the same 180 degree latch can be used in either configuration. Balisong hooks have many variations, including magnetic variants and some that can be opened through the spring when the handles are squeezed together.
The utility knife also often uses a latch to hold the folding blade either open or closed. This allows it to be locked in orientation to the handle when in use, but it is also stored securely. To unlock this type of knife may require a much greater force than various weapons as an additional security feature.
More
Crossbows combine the type of latch to hold the drawstring arc before shooting.
Automobiles
The car incorporates many special purpose hooks as door components, hood/hood, luggage/boot door, seat belt, etc.
In a passenger car, the hood can be held up by a hidden latch. In a race car or car with an aftermarket hood (which does not use a factory latch system), the hood can be pressed by a pin hood.
The term Nader bolt is the nickname for the bolt on the vehicle that allows the hinged door to remain securely locked and closed. It was named after consumer rights advocate and politician Ralph Nader, who in 1965 released the book Unsafe at Any Speed ​​claiming that the American automaker was fundamentally flawed with respect to operator safety.
Hooks in seat belts usually tie a belt that blocks occupants to the body of the car. Especially in the rear seats, slightly different hooks can be used for each seat to prevent adjacent seat belts from sticking to the wrong point. The release of the inertial safety belt is a potential state where, in collision, the locking of the seat belt may inadvertently escape causing potential injury to the passenger. The additional risk of locking the seat belt is that in some cases the occupant may believe that the button is secure (eg, by hearing the characteristic clicks) when in fact it is not.
A parking pawl is a device that locks the transmission on an automated vehicle when placed in the park.
Bakeware
The spring button (in this case the over-center latch) is used to hold the spring pan wall in place.
See also
- The door chain
- Electric strike
- Single-point locking
- Snib
References
Source of the article : Wikipedia
0 Comments