Practical mechanical drawing and machine design self taught .. (1907)
Westinghouse, Charles. [from old catalog] · Chicago, F. J. Drake & co. · leaf 144
n its straight-line path by contact withthe surfaces of the slot; but the description ofhow a plane surface is produced is more a matterof workshop practice than of kinematics, and it MECHANISMS 141 will be found in most text-books wMcb. deal witliworkshop appliances. The mechanism representedin… … ^7777777777777777777^^ Fig. 218. Tchebicheffs. The two levers, P^B and PgD, areof equal leng-th, and are crossed, and the couplerDB, in the mean position of the mechanism, isparallel to the fixed link (Fig, 218). The tracingpoint, A, is the middle point of the coupler, and,very approximately,…
Mechanical drawing · Machine design
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