A spring or similar mechanism causes the latch to return to its protruding state whenever the knob is not being turned. The end of the cylinder is the " latch bolt" (more simply known as the "latch"), which protrudes into a space carved out of the door frame, and which prevents the door from being opened if the knob is not turned. Pushing the lever or turning the knob pulls the cylinder in the direction of the turn. The doorknob has a spindle running through it that sits just above a cylinder, to which the spindle is connected.
#PULL DOOR INSTALL#
The lever latch handle is easy to install and use, and is available in a variety of styles and finishes. This type of door handle is used on interior doors that do not require to be locked. Pushing the handle down rotates the spindle, operating the tubular latch mechanism inside the door, allowing it to be opened. The door handle has only a lever handle or knob which operates this latch. Doors fitted with this handle have a latch that keeps the door shut. The most common type of door handle is the Lever latch or Latch door handle on a backplate found in residential houses and commercial and public buildings.Some door handles are also arm- or foot-operated to reduce transmission of contagious illnesses. Door handles have been in existence for at least 5000 years, and its design has evolved since, with more advanced mechanism, types, and designs made. Examples include brass, porcelain, cut glass, wood, and bronze. Door handles can be made out of a plethora of materials. The most common types of door handle are the lever handle and the doorknob. A large number of handles, particularly for commercial and residential doors, incorporate latching or locking mechanisms or are manufactured to fit to standardised door locking or latching mechanisms. There are many designs of door handle, depending on the appropriate use. Door handles can be found on all types of doors including exterior doors of residential and commercial buildings, internal doors, cupboard doors and vehicle doors. Various examples of door handles throughout historyĪ door handle or doorknob is a handle used to open or close a door.
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