a flat one. At C note that the outline of the hemisphere is made up of a serai-circle and a semi-ellipse. Also noticehow the curved lines of the slot are determined. 208. At Q, Fig. 32, is shown a torus ring, a form occurring in valve handles, hand wheels, pipe returnsand bends. If we take equal… … Fig. 32. point where it is situated. A projection of the wire hoop would be an elUpse, as shown in the dotted hne inQ. Each paper circle would project as an ellipse. The major axis of each ellipse would be perpendicular to thecurve of the wire i.e. to the curve of the large ellipse. Major axes of…
Mechanical drawing · Lettering
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