Alacoque Door Handles September 21st, 2017 - 06:04:32
Aluminium Handles - ever heard the saying simple yet effective? This sums up these door handles in one sentence. They are plain simple cheap and so versatile that they are perfect for pretty much any kind of setting. Their design is straight lines and simple the aluminum metal makes them look clean and hygienic. Due to their superb value for money these are great for offices public buildings and schools; They are also usually DDA Compliant and also suitable for social housing.
The simplest handle is a pull - or push - projection on the side opposite the hinge. The placement of the handle is generally where it will provide an optimal mechanical advantage; most doors operating as second class levers. Doors with centre pulls or rings or a pivot point in a location other than one edge of the door use first or third class lever principles. Depictions of door handles in paintings dating to the first century CE are centrally placed hinged rings. The modern door knocker is a vestige of this style of primitive door handle. Doors were typically secured by bars and brackets to prevent them from being opened by either intent or accident.
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.
Besides security it is important to consider the functionality of the door furniture handle. If the door is made of hardwood it should have a handle mechanism that makes it easy to open and close the door. Furthermore handles in common passage doors need to be durable to handle the continuous handling. You can then use the less durable but more beautiful handles for the inner doors that may not require a lot of opening and closing. A major concern with door knobs especially for public doors is the hygiene. People including medical practitioners have argued that handles do spread contagious diseases. By using materials like brass copper and silver you reduce the infection rate since these metals are poisonous to germs.