Door knobs have been in use around the world for centuries and were first manufactured in the United States in the mid-nineteenth century. Though spherical or ball-shaped door knobs are the hardest to turn, this shape is most preferred. Egg-shaped door knobs are the easiest for most people to use. Doorknobs have been made of many materials, including wood, ceramic, glass, plastic and different types of metal. Brass is one of the most popular materials because of its excellent resistance to rust.
The average doorknob is 5.715 cm in diameter. The basic constituents of the knob are rose, shank, spindle and knob-top. The knob-top is the upper and larger part that is grasped by the hand. The shank is the projecting stem of a knob and contains a hole to hold the spindle. The knob rose is a round plate or washer that forms a knob socket and is adapted for attachment to the surface of a door. The knob is attached to the spindle, a metal shaft is used for turning the latch of the lock. Doorfurnitureonline.com is a leading provider of door knobs in UK.
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