A practical treatise on handrailing : showing new and simple methods for finding the pitch of the plank, drawing the moulds, bevelling, jointing-up, and squaring the wreath (1890)
Collings, George · London : Crosby Lockwood and Son · leaf 69
43 QUADRANT OF WINDERS. that the quarter ellipse of the moulds must finish at the points we have indicated ; secondly, that these points will always be perpendicularly over the inside and outside of the rail on the joint line of the plan ; thirdh% that the triangular piece we added to the inside of… … of the pieces we have added Fig. t. will be found to belong to and form part of the opposite quarter circle. The concave side of the mould, therefore, when the joint line is drawn, covers more than a quarter of a circle. But we cannot draw more than a quarter of an ellipse on the one mould when the…
Hand-railing · Stair building
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
