Industrial drawing and geometry; an introduction to various branches of technical drawing (1911)
Spooner, Henry John, 1856- · London, New York [etc.] Longmans, Green, and co. · leaf 53
Lines.—Let the given lines beAB, AC, and CD (Fig. 96), iatersecting in A and C. Bisect the angle BAC by the line AE.The centre of the requii-ed circle must be somewhere in this line. Bisect the angle ACD bythe Une CF ; the centre must also be somewhere in CF. Therefore it is in G, the… … Fig. 95.—Arc touching agiven arc and a Une in a A H B Fig. 96.—Circle touchingthree straight lines. fixed point.Note.—This problem sometimes occurs when a small bevel wheel is drawn, and AB is part of the boss or hub, and CD is the back of the rim. Three other circles can be drawn to touch the…
Mechanical drawing · Geometrical drawing
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