Published at Thursday, September 29th, 2016 - 02:18:13 AM. Door. By john.
Hinge terminology : Components : Pin The rod that holds the leaves together, inside the knuckle. Knuckle The hollow—typically circular—portion creating the joint of the hinge through which the pin is set. The knuckles of either leaf typically alternate and interlock with the pin passing through all of them. (aka. loop, joint, node or curl) Leaf The portions (typically two) that extend laterally from the knuckle and typically revolve around the pin. Characteristics End Play Axial movement between the leaves along the axis of the pin. This motion allows the leaves to rotate without binding and is determined by the typical distance between knuckles (knuckle gap) when both edges of the leaves are aligned. Gauge Thickness of the leaves. Hinge Width Length from the outer edge of one leaf to the outer edge of the other leaf, perpendicularly across the pin(aka open width). Hinge Length The length of the leaves parallel to the pin. Knuckle Length The typical length of an individual knuckle parallel to the pin. Leaf Width Length from the center of the pin to the outer edge of the leaf. Pitch Distance from the end of a knuckle to the same edge of its adjacent knuckle on the same leaf Slop A colloquialism referring to loose angular movement of the leaves relative to the pin.
A door is a panel that makes an opening in a building, room or vehicle. Doors are usually made of a hard, impermeable, and hard-to-break substance (such as wood or metal), but sometimes consisting of a hard frame into which windows or screens have been fitted. Doors are often attached by hinges to a frame. Doors make ingress into or egress from a building, room, or vehicle easier to manage. The panel may be moved in various ways (at angles away from the frame, by sliding on a plane parallel to the frame, by folding in angles on a parallel plane, or by spinning along an axis at the center of the frame) to allow or prevent ingress or egress. In most cases, a doors interior matches its exterior side. But in other cases (e.g., a vehicle door) the two sides are radically different. Often doors have locking mechanisms to ensure that only some people can open them. Doors can have devices such as knockers or doorbells by which people outside can announce their presence and summon someone either to open the door for them or give permission to open and enter. Apart from providing access into and out of a space, doors can have the secondary functions of ensuring privacy by preventing unwanted attention from outsiders, of separating areas with different functions, of allowing light to pass into and out of a space, of controlling ventilation or air drafts so that interiors may be more effectively heated or cooled, of dampening noise, and of blocking the spread of fire. Doors may have aesthetic, symbolic, ritualistic purposes. To be given the key to a door can signify a change in status from outsider to insider. Doors and doorways frequently appear in literature and the arts with metaphorical or allegorical import as a portent of change.
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