A duster brush (jamb duster) is a painter's large brush, about ten centimetres wide and three centimetres thick with long bristles, about eight centimetres long. A duster brush is used for removing dry grit, dirt and dust prior to painting. Research Duster Brush
In architecture, the term elbow describes a sharp angle in any surface of wainscoting or other woodwork; the upright sides which flank any panelled work, as the sides of windows, where the jamb makes an elbow with the window back.
In architecture an impost is the top member of a pillar, pier, wall, etc., upon which the weight of an arch rests. The impost is called continuous, if the mouldings of the arch or architrave run down the jamb or pier without a break. Research Impost
In architecture a jamb is the vertical side of any opening, such as a door or fireplace; hence, less properly, the term applies to any narrow vertical surface of a wall, such as the wall of a chimney- breast or of a pier, as distinguished from its face. Research Jamb
In architecture, a stop is a member, plain or moulded, formed of a separate piece and fixed to a jamb, against which a door or window shuts. This takes the place, or answers the purpose, of a rebate.
 
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert