The greeks developed a simple door lock by about 700 b c.
Materials used in door handle.
As a material for door handles stainless steel is thus best applied to heavily used doors particularly those in public buildings such as the public authorities hospitals on ships in motorway.
Some door handles are arm or foot operated to reduce transmission of contagious illnesses.
The average doorknob is 2 25 in 5 715 cm in diameter.
The key itself was a sickle shaped piece of metal from two to three feet long.
It can be plain white cream or black or combined with gold lines or brass chrome and bronze fittings.
Although not as popular porcelain door handles are available in many different colours.
By pulling the string the homeowner could lock the door from the outside.
Door handles can be made out of a wide variety of materials.
Porcelain is mainly used for internal door knobs and is a very practical and low maintenance material.
Brass is one of the most popular materials because of its excellent resistance to rust.
Egg shaped door knobs are the easiest for most people to use.
Wood doors are primarily used for interior door applications.
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 white porcelain brown mineral cut glass wood and victorian bronze.
Doorknobs have been made of many materials including wood ceramic glass plastic and different types of metal.
Then the string was stuffed back through the keyhole.
A combination of several materials is sometimes used but the three basic material choices for exterior doors are wood steel and fiberglass.
You can go as basic as a flat door or as ornate as panel doors with detailed carvings.
Wood doors are probably some of the most beautiful doors on the market and have seemingly endless design and finish options.