Alacoque Door Handles September 21st, 2017 - 05:50:55
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.
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.
Doors throughout history have also changed regarding functionality. For instance we still find doors of all types those that roll slide swing and fold. Of course for doors to function hardware is required to include door handles. Just as with doors handles have a long history although these were first manufactured during the mid-19th century in America. The first handle was shaped like an egg and today they are still found in many homes especially older homes. Interestingly because of the way this type of door handle is grasped it has proved to be the easiest to open.
This is because it can be very easy to buy a range of handles only to decide you need some with integrated locks at a later date but if they do not do them in the range you may find yourself swapping out all of your handles for a new range. So a tip when buying is to make sure that the range you are looking at actually has all the handle fitments you need to avoid a costly swap out at a later date. Also if you are buying ones for commercial premises then you may want to ask your supplier if the handles you are looking at purchasing will be suitable as they will have to put up with a lot more "Traffic" in terms of how often they are opened and closed during the day as well as how hard wearing the finish of the door handles is.