The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 19
, &c. there is not the necessary space. For thispurpose it is proposed to make use of the well-know property, that if acircle of radius r roll in the interior of a circle 2 r, any point in the cir-cumference of the former will constantly describe the same diameter ofthe latter. This geometrical… … Fig. J. drical studs fixed at equal distances in the pitch circle of radius 2t,cbeing its centre. These are fixed firmly to the frame. The bar c E, re-presented by the dotted line, is capable of moving about the fixed centre c,Hind at E carries the centre of the segment F G of radius r; e E = r C…
Architecture · Civil engineering · Science
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