Door Handles. Sunday , November 19th , 2017 - 03:51:25 AM
There are two types of handles, when it comes to general use: external or outdoor handles which are utilized on all main entrances to the home, be it front door, back door, side door or service door; and internal handles which are used for the doors inside the house such as bedroom doors and toilet doors. One of the most popular broad types of external door handles is the lever type, which is commonly used in European homes. External latches are normally bigger as they frequently come with key-in locks for security, and are called lever lock handles. Indoor handles (or lever latch handles) are smaller, as they come without locks, and key-in locks are normally installed separately on the door. There are also external handles with combined door knockers, a very practical alternative when your electric door buzzer is out of order.
As door handles easily catch germs and bacteria because of the variety of individual hands that touch them in the course of a day, it is important to consider the materials used. It is believed that certain materials like brass, copper and silver discourage the growth of bacteria and germs through some kind of electro-chemical effect; while other materials like aluminum, stainless steel, glass and porcelain do not have the same action. However, this belief has remained just that... a belief: and studies have not been extensive enough to confirm or disprove this possible effect, except in the case of silver. Hospitals in particular are experimenting with handle materials as they continue their fight against infectious disease within their wards.
When you consider that some 120 million doorways exist in the United States alone and another two million are installed each year, you can only imagine the vast number of door knobs. Going back in history, doors were initially made from textiles and animal hides. However, during the ancient Mesopotamia and Egyptian era, wooden doors were developed. Soon, materials for making doors expanded to include stone, glass, metal, and even paper.
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