Published at Wednesday, September 28th, 2016 - 18:08:13 PM. 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.
Dutch door : A Dutch door (American English), stable door (British English), or half door (Hiberno English), is a door divided horizontally in such a fashion that the bottom half may remain shut while the top half opens. They were known in early New England as a double-hung door. The initial purpose of this door design was to keep animals out of farmhouses or to keep children inside while allowing light and air to filter through the open top; essentially combining a door with a fairly large window. When the top half was open they also allowed a breeze, but stopped the wind from blowing dirt into the house. This type of door was common in the Netherlands in the seventeenth century and appears in Dutch paintings of the period. They were also commonly found in the Dutch cultural areas of New York and New Jersey before the American Revolution. Dutch doors are often used in North-American passenger train cars to allow crewmen to interact safely with other employees not aboard their trains (or simply to visually inspect their own train) without risking falling from the train. Recent operating rules changes in Canada have rendered the Dutch-doors obsolete, although older rolling stock retains the doors. Similar doors were once commonplace in Irish houses, called half-doors (Irish: leathdoras or comhla bheag). According to The Irish Times, A traditional half-door is really a door and a half – a full door that opens inwards and a half door set to the front of the frame that opens outwards. They were designed to keep poultry and pigs from entering the house, as well as allowing air and sunlight into the usually dark and smoky cottages. The term is also applied to the modified rear doors on selected GMC Safaris and Chevrolet Astros that have a flip up rear window and two small half-size doors underneath.
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